Defaults rename, clean up api to use properties or direct access rather than

explicit getters.

IPython/Extensions/clearcmd.py

@@ -1,46 +1,46 b''
 # -*- coding: utf-8 -*-
 """ IPython extension: add %clear magic """
 
 import IPython.ipapi
 import gc
 ip = IPython.ipapi.get()
 
 
 def clear_f(self,arg):
     """ Clear various data (e.g. stored history data)
     
     %clear out - clear output history
     %clear in  - clear input history
     """
     
     api = self.getapi()
     for target in arg.split():
         if target == 'out':
-            print "Flushing output cache (%d entries)" % len(api.user_ns()['_oh'])
+            print "Flushing output cache (%d entries)" % len(api.user_ns['_oh'])
             self.outputcache.flush()
         elif target == 'in':
             print "Flushing input history"
             from IPython import iplib
             del self.input_hist[:]
             del self.input_hist_raw[:]
             for n in range(1,self.outputcache.prompt_count + 1):
                 key = '_i'+`n`
                 try:
                     del self.user_ns[key]
                 except: pass
         elif target == 'array':
             try:
                 pylab=ip.IP.pylab
                 for x in self.user_ns.keys():
                     if isinstance(self.user_ns[x],pylab.arraytype):
                         del self.user_ns[x]
             except AttributeError:
                 print "Clear array only available in -pylab mode"
             gc.collect()                
             
             
 ip.expose_magic("clear",clear_f)
     
 
 
 

IPython/Extensions/ext_rescapture.py

@@ -1,66 +1,66 b''
 # -*- coding: utf-8 -*-
 """ IPython extension: new prefilters for output grabbing 
 
 Provides 
 
 var = %magic blah blah
 
 var = !ls
 
 $Id: genutils.py 1077 2006-01-24 18:15:27Z vivainio $
 
 """
 
 import IPython.ipapi
 from IPython.genutils import *
 
 ip = IPython.ipapi.get()
 
 import re
 
 def hnd_magic(line,mo):
     """ Handle a = %mymagic blah blah """
     #cmd = genutils.make_quoted_expr(mo.group('syscmd'))
     #mag = 'ipmagic
     #return "%s = %s"
     var = mo.group('varname')
     cmd = mo.group('cmd')
     expr = make_quoted_expr(cmd)
     return itpl('$var = _ip.magic($expr)')
 
 def hnd_syscmd(line,mo):
     """ Handle a = !ls """
     #cmd = genutils.make_quoted_expr(mo.group('syscmd'))
     #mag = 'ipmagic
     #return "%s = %s"
     var = mo.group('varname')
     cmd = mo.group('cmd')
     expr = make_quoted_expr(itpl("sc -lv =$cmd"))
     return itpl('$var = _ip.magic($expr)')
 
 def install_re_handler(pat, hnd):
-    ip.meta().re_prefilters.append((re.compile(pat), hnd))
+    ip.meta.re_prefilters.append((re.compile(pat), hnd))
 
 def init_handlers():
 
-    ip.meta().re_prefilters = []
+    ip.meta.re_prefilters = []
 
     install_re_handler('(?P<varname>[\w\.]+)\s*=\s*%(?P<cmd>.*)',
                        hnd_magic
                        )
     
     install_re_handler('(?P<varname>[\w\.]+)\s*=\s*!(?P<cmd>.*)',
                        hnd_syscmd
                        )
 
 init_handlers()
 
 def regex_prefilter_f(self,line):    
-    for pat, handler in ip.meta().re_prefilters:
+    for pat, handler in ip.meta.re_prefilters:
         mo = pat.match(line)
         if mo:
             return handler(line,mo)
     
     raise IPython.ipapi.TryNext
 
 ip.set_hook('input_prefilter', regex_prefilter_f)     

IPython/Extensions/ipipe.py

@@ -1,1841 +1,1841 b''
 # -*- coding: iso-8859-1 -*-
 
 """
 ``ipipe`` provides classes to be used in an interactive Python session. Doing a
 ``from ipipe import *`` is the preferred way to do this. The name of all
 objects imported this way starts with ``i`` to minimize collisions.
 
 ``ipipe`` supports "pipeline expressions", which is something resembling Unix
 pipes. An example is:
 
     >>> ienv | isort("key.lower()")
 
 This gives a listing of all environment variables sorted by name.
 
 
 There are three types of objects in a pipeline expression:
 
 * ``Table``s: These objects produce items. Examples are ``ls`` (listing the
   current directory, ``ienv`` (listing environment variables), ``ipwd`` (listing
   user account) and ``igrp`` (listing user groups). A ``Table`` must be the
   first object in a pipe expression.
 
 * ``Pipe``s: These objects sit in the middle of a pipe expression. They
   transform the input in some way (e.g. filtering or sorting it). Examples are:
   ``ifilter`` (which filters the input pipe), ``isort`` (which sorts the input
   pipe) and ``ieval`` (which evaluates a function or expression for each object
   in the input pipe).
 
 * ``Display``s: These objects can be put as the last object in a pipeline
   expression. There are responsible for displaying the result of the pipeline
   expression. If a pipeline expression doesn't end in a display object a default
   display objects will be used. One example is ``browse`` which is a ``curses``
   based browser.
 
 
 Adding support for pipeline expressions to your own objects can be done through
 three extensions points (all of them optional):
 
 * An object that will be displayed as a row by a ``Display`` object should
   implement the method ``__xattrs__(self, mode)``. This method must return a
   sequence of attribute names. This sequence may also contain integers, which
   will be treated as sequence indizes. Also supported is ``None``, which uses
   the object itself and callables which will be called with the object as the
   an argument. If ``__xattrs__()`` isn't implemented ``(None,)`` will be used as
   the attribute sequence (i.e. the object itself (it's ``repr()`` format) will
   be being displayed. The global function ``xattrs()`` implements this
   functionality.
 
 * When an object ``foo`` is displayed in the header, footer or table cell of the
   browser ``foo.__xrepr__(mode)`` is called. Mode can be ``"header"`` or
   ``"footer"`` for the header or footer line and ``"cell"`` for a table cell.
   ``__xrepr__()```must return an iterable (e.g. by being a generator) which
   produces the following items: The first item should be a tuple containing
   the alignment (-1 left aligned, 0 centered and 1 right aligned) and whether
   the complete output must be displayed or if the browser is allowed to stop
   output after enough text has been produced (e.g. a syntax highlighted text
   line would use ``True``, but for a large data structure (i.e. a nested list,
   tuple or dictionary) ``False`` would be used). The other output ``__xrepr__()``
   may produce is tuples of ``Style```objects and text (which contain the text
   representation of the object; see the ``astyle`` module). If ``__xrepr__()``
   recursively outputs a data structure the function ``xrepr(object, mode)`` can
   be used and ``"default"`` must be passed as the mode in these calls. This in
   turn calls the ``__xrepr__()`` method on ``object`` (or uses ``repr(object)``
   as the string representation if ``__xrepr__()`` doesn't exist).
 
 * Objects that can be iterated by ``Pipe``s must implement the method
 ``__xiter__(self, mode)``. ``mode`` can take the following values:
 
   - ``"default"``: This is the default value and ist always used by pipeline
     expressions. Other values are only used in the browser.
   - ``None``: This value is passed by the browser. The object must return an
     iterable of ``XMode`` objects describing all modes supported by the object.
     (This should never include ``"default"`` or ``None``).
   - Any other value that the object supports.
 
   The global function ``xiter()`` can be called to get such an iterator. If
   the method ``_xiter__`` isn't implemented, ``xiter()`` falls back to
   ``__iter__``. In addition to that, dictionaries and modules receive special
   treatment (returning an iterator over ``(key, value)`` pairs). This makes it
   possible to use dictionaries and modules in pipeline expressions, for example:
 
       >>> import sys
       >>> sys | ifilter("isinstance(value, int)") | idump
       key        |value
       api_version|      1012
       dllhandle  | 503316480
       hexversion |  33817328
       maxint     |2147483647
       maxunicode |     65535
       >>> sys.modules | ifilter("_.value is not None") | isort("_.key.lower()")
       ...
 
   Note: The expression strings passed to ``ifilter()`` and ``isort()`` can
   refer to the object to be filtered or sorted via the variable ``_`` and to any
   of the attributes of the object, i.e.:
 
       >>> sys.modules | ifilter("_.value is not None") | isort("_.key.lower()")
 
   does the same as
 
       >>> sys.modules | ifilter("value is not None") | isort("key.lower()")
 
   In addition to expression strings, it's possible to pass callables (taking
   the object as an argument) to ``ifilter()``, ``isort()`` and ``ieval()``:
 
       >>> sys | ifilter(lambda _:isinstance(_.value, int)) \
       ...     | ieval(lambda _: (_.key, hex(_.value))) | idump
       0          |1
       api_version|0x3f4
       dllhandle  |0x1e000000
       hexversion |0x20402f0
       maxint     |0x7fffffff
       maxunicode |0xffff
 """
 
 import sys, os, os.path, stat, glob, new, csv, datetime, types
 import itertools, mimetypes
 
 try: # Python 2.3 compatibility
     import collections
 except ImportError:
     deque = list
 else:
     deque = collections.deque
 
 try: # Python 2.3 compatibility
     set
 except NameError:
     import sets
     set = sets.Set
 
 try: # Python 2.3 compatibility
     sorted
 except NameError:
     def sorted(iterator, key=None, reverse=False):
         items = list(iterator)
         if key is not None:
             items.sort(lambda i1, i2: cmp(key(i1), key(i2)))
         else:
             items.sort()
         if reverse:
             items.reverse()
         return items
 
 try:
     import pwd
 except ImportError:
     pwd = None
 
 try:
     import grp
 except ImportError:
     grp = None
 
 import path
 try:
     from IPython import genutils, ipapi
 except ImportError:
     genutils = None
     ipapi = None
 
 import astyle
 
 
 __all__ = [
     "ifile", "ils", "iglob", "iwalk", "ipwdentry", "ipwd", "igrpentry", "igrp",
     "icsv", "ix", "ichain", "isort", "ifilter", "ieval", "ienum", "ienv",
     "idump", "iless"
 ]
 
 
 os.stat_float_times(True) # enable microseconds
 
 
 class AttrNamespace(object):
     """
     Helper class that is used for providing a namespace for evaluating
     expressions containing attribute names of an object.
     """
     def __init__(self, wrapped):
         self.wrapped = wrapped
 
     def __getitem__(self, name):
         if name == "_":
             return self.wrapped
         try:
             return getattr(self.wrapped, name)
         except AttributeError:
             raise KeyError(name)
 
 # Python 2.3 compatibility
 # use eval workaround to find out which names are used in the
 # eval string and put them into the locals. This works for most
 # normal uses case, bizarre ones like accessing the locals()
 # will fail
 try:
     eval("_", None, AttrNamespace(None))
 except TypeError:
     real_eval = eval
     def eval(codestring, _globals, _locals):
         """
         eval(source[, globals[, locals]]) -> value
 
         Evaluate the source in the context of globals and locals.
         The source may be a string representing a Python expression
         or a code object as returned by compile().
         The globals must be a dictionary and locals can be any mappping.
 
         This function is a workaround for the shortcomings of
         Python 2.3's eval.
         """
 
         code = compile(codestring, "_eval", "eval")
         newlocals = {}
         for name in code.co_names:
             try:
                 newlocals[name] = _locals[name]
             except KeyError:
                 pass
         return real_eval(code, _globals, newlocals)
 
 
 noitem = object()
 
 def item(iterator, index, default=noitem):
     """
     Return the ``index``th item from the iterator ``iterator``.
     ``index`` must be an integer (negative integers are relative to the
     end (i.e. the last item produced by the iterator)).
 
     If ``default`` is given, this will be the default value when
     the iterator doesn't contain an item at this position. Otherwise an
     ``IndexError`` will be raised.
 
     Note that using this function will partially or totally exhaust the
     iterator.
     """
     i = index
     if i>=0:
         for item in iterator:
             if not i:
                 return item
             i -= 1
     else:
         i = -index
         cache = deque()
         for item in iterator:
             cache.append(item)
             if len(cache)>i:
                 cache.popleft()
         if len(cache)==i:
             return cache.popleft()
     if default is noitem:
         raise IndexError(index)
     else:
         return default
 
 
 def getglobals(g):
     if g is None:
         if ipapi is not None:
-            return ipapi.get().user_ns()
+            return ipapi.get().user_ns
         else:
             return globals()
     return g
 
 
 class Table(object):
     """
     A ``Table`` is an object that produces items (just like a normal Python
     iterator/generator does) and can be used as the first object in a pipeline
     expression. The displayhook will open the default browser for such an object
     (instead of simply printing the ``repr()`` result).
     """
 
     # We want to support ``foo`` and ``foo()`` in pipeline expression:
     # So we implement the required operators (``|`` and ``+``) in the metaclass,
     # instantiate the class and forward the operator to the instance
     class __metaclass__(type):
         def __iter__(self):
             return iter(self())
 
         def __or__(self, other):
             return self() | other
 
         def __add__(self, other):
             return self() + other
 
         def __radd__(self, other):
             return other + self()
 
         def __getitem__(self, index):
             return self()[index]
 
     def __getitem__(self, index):
         return item(self, index)
 
     def __contains__(self, item):
         for haveitem in self:
             if item == haveitem:
                 return True
         return False
 
     def __or__(self, other):
         # autoinstantiate right hand side
         if isinstance(other, type) and issubclass(other, (Table, Display)):
             other = other()
         # treat simple strings and functions as ``ieval`` instances
         elif not isinstance(other, Display) and not isinstance(other, Table):
             other = ieval(other)
         # forward operations to the right hand side
         return other.__ror__(self)
 
     def __add__(self, other):
         # autoinstantiate right hand side
         if isinstance(other, type) and issubclass(other, Table):
             other = other()
         return ichain(self, other)
 
     def __radd__(self, other):
         # autoinstantiate left hand side
         if isinstance(other, type) and issubclass(other, Table):
             other = other()
         return ichain(other, self)
 
     def __iter__(self):
         return xiter(self, "default")
 
 
 class Pipe(Table):
     """
     A ``Pipe`` is an object that can be used in a pipeline expression. It
     processes the objects it gets from its input ``Table``/``Pipe``. Note that
     a ``Pipe`` object can't be used as the first object in a pipeline
     expression, as it doesn't produces items itself.
     """
     class __metaclass__(Table.__metaclass__):
         def __ror__(self, input):
             return input | self()
 
     def __ror__(self, input):
         # autoinstantiate left hand side
         if isinstance(input, type) and issubclass(input, Table):
             input = input()
         self.input = input
         return self
 
 
 def _getattr(obj, name, default=noitem):
     """
     Internal helper for getting an attribute of an item. If ``name`` is ``None``
     return the object itself. If ``name`` is an integer, use ``__getitem__``
     instead. If the attribute or item does not exist, return ``default``.
     """
     if name is None:
         return obj
     elif isinstance(name, basestring):
         if name.endswith("()"):
             return getattr(obj, name[:-2], default)()
         else:
             return getattr(obj, name, default)
     elif callable(name):
         try:
             return name(obj)
         except AttributeError:
             return default
     else:
         try:
             return obj[name]
         except IndexError:
             return default
 
 
 def _attrname(name):
     """
     Internal helper that gives a proper name for the attribute ``name``
     (which might be ``None`` or an ``int``).
     """
     if name is None:
         return "_"
     elif isinstance(name, basestring):
         return name
     elif callable(name):
         return getattr(name, "__xname__", name.__name__)
     else:
         return str(name)
 
 
 def xrepr(item, mode):
     try:
         func = item.__xrepr__
     except AttributeError:
         pass
     else:
         try:
             for x in func(mode):
                 yield x
         except (KeyboardInterrupt, SystemExit):
             raise
         except Exception:
             yield (astyle.style_default, repr(item))
         return
     if item is None:
         yield (astyle.style_type_none, repr(item))
     elif isinstance(item, bool):
         yield (astyle.style_type_bool, repr(item))
     elif isinstance(item, str):
         if mode == "cell":
             yield (astyle.style_default, repr(item.expandtabs(tab))[1:-1])
         else:
             yield (astyle.style_default, repr(item))
     elif isinstance(item, unicode):
         if mode == "cell":
             yield (astyle.style_default, repr(item.expandtabs(tab))[2:-1])
         else:
             yield (astyle.style_default, repr(item))
     elif isinstance(item, (int, long, float)):
         yield (1, True)
         yield (astyle.style_type_number, repr(item))
     elif isinstance(item, complex):
         yield (astyle.style_type_number, repr(item))
     elif isinstance(item, datetime.datetime):
         if mode == "cell":
             # Don't use strftime() here, as this requires year >= 1900
             yield (astyle.style_type_datetime,
                    "%04d-%02d-%02d %02d:%02d:%02d.%06d" % \
                         (item.year, item.month, item.day,
                          item.hour, item.minute, item.second,
                          item.microsecond),
                     )
         else:
             yield (astyle.style_type_datetime, repr(item))
     elif isinstance(item, datetime.date):
         if mode == "cell":
             yield (astyle.style_type_datetime,
                    "%04d-%02d-%02d" % (item.year, item.month, item.day))
         else:
             yield (astyle.style_type_datetime, repr(item))
     elif isinstance(item, datetime.time):
         if mode == "cell":
             yield (astyle.style_type_datetime,
                     "%02d:%02d:%02d.%06d" % \
                         (item.hour, item.minute, item.second, item.microsecond))
         else:
             yield (astyle.style_type_datetime, repr(item))
     elif isinstance(item, datetime.timedelta):
         yield (astyle.style_type_datetime, repr(item))
     elif isinstance(item, Exception):
         if item.__class__.__module__ == "exceptions":
             classname = item.__class__.__name__
         else:
             classname = "%s.%s" % \
                 (item.__class__.__module__, item.__class__.__name__)
         if mode == "header" or mode == "footer":
             yield (astyle.style_error, "%s: %s" % (classname, item))
         else:
             yield (astyle.style_error, classname)
     elif isinstance(item, (list, tuple)):
         if mode == "header" or mode == "footer":
             if item.__class__.__module__ == "__builtin__":
                 classname = item.__class__.__name__
             else:
                 classname = "%s.%s" % \
                     (item.__class__.__module__,item.__class__.__name__)
             yield (astyle.style_default,
                    "<%s object with %d items at 0x%x>" % \
                        (classname, len(item), id(item)))
         else:
             yield (-1, False)
             if isinstance(item, list):
                 yield (astyle.style_default, "[")
                 end = "]"
             else:
                 yield (astyle.style_default, "(")
                 end = ")"
             for (i, subitem) in enumerate(item):
                 if i:
                     yield (astyle.style_default, ", ")
                 for part in xrepr(subitem, "default"):
                     yield part
             yield (astyle.style_default, end)
     elif isinstance(item, (dict, types.DictProxyType)):
         if mode == "header" or mode == "footer":
             if item.__class__.__module__ == "__builtin__":
                 classname = item.__class__.__name__
             else:
                 classname = "%s.%s" % \
                     (item.__class__.__module__,item.__class__.__name__)
             yield (astyle.style_default,
                    "<%s object with %d items at 0x%x>" % \
                     (classname, len(item), id(item)))
         else:
             yield (-1, False)
             if isinstance(item, dict):
                 yield (astyle.style_default, "{")
                 end = "}"
             else:
                 yield (astyle.style_default, "dictproxy((")
                 end = "})"
             for (i, (key, value)) in enumerate(item.iteritems()):
                 if i:
                     yield (astyle.style_default, ", ")
                 for part in xrepr(key, "default"):
                     yield part
                 yield (astyle.style_default, ": ")
                 for part in xrepr(value, "default"):
                     yield part
             yield (astyle.style_default, end)
     else:
         yield (astyle.style_default, repr(item))
 
 
 def xattrs(item, mode):
     try:
         func = item.__xattrs__
     except AttributeError:
         if mode == "detail":
             return dir(item)
         else:
             return (None,)
     else:
         try:
             return func(mode)
         except (KeyboardInterrupt, SystemExit):
             raise
         except Exception:
             return (None,)
 
 
 def xiter(item, mode):
     if mode == "detail":
         def items():
             for name in xattrs(item, mode):
                 yield XAttr(item, name)
         return items()
     try:
         func = item.__xiter__
     except AttributeError:
         if isinstance(item, (dict, types.DictProxyType)):
             def items(item):
                 fields = ("key", "value")
                 for (key, value) in item.iteritems():
                     yield Fields(fields, key=key, value=value)
             return items(item)
         elif isinstance(item, new.module):
             def items(item):
                 fields = ("key", "value")
                 for key in sorted(item.__dict__):
                     yield Fields(fields, key=key, value=getattr(item, key))
             return items(item)
         elif isinstance(item, basestring):
             if not len(item):
                 raise ValueError("can't enter empty string")
             lines = item.splitlines()
             if len(lines) <= 1:
                 raise ValueError("can't enter one line string")
             return iter(lines)
         return iter(item)
     else:
         return iter(func(mode)) # iter() just to be safe
 
 
 class ichain(Pipe):
     """
     Chains multiple ``Table``s into one.
     """
 
     def __init__(self, *iters):
         self.iters = iters
 
     def __xiter__(self, mode):
         return itertools.chain(*self.iters)
 
     def __xrepr__(self, mode):
         if mode == "header" or mode == "footer":
             for (i, item) in enumerate(self.iters):
                 if i:
                     yield (astyle.style_default, "+")
                 if isinstance(item, Pipe):
                     yield (astyle.style_default, "(")
                 for part in xrepr(item, mode):
                     yield part
                 if isinstance(item, Pipe):
                     yield (astyle.style_default, ")")
         else:
             yield (astyle.style_default, repr(self))
 
     def __repr__(self):
         args = ", ".join([repr(it) for it in self.iters])
         return "%s.%s(%s)" % \
             (self.__class__.__module__, self.__class__.__name__, args)
 
 
 class ifile(path.path):
     """
     file (or directory) object.
     """
 
     def __add_(self, other):
         return ifile(path._base(self) + other)
 
     def __radd_(self, other):
         return ifile(other + path._base(self))
 
     def __div_(self, other):
         return ifile(path.__div__(self, other))
 
     def getcwd():
         return ifile(path.path.getcwd())
     getcwd.__doc__ = path.path.getcwd.__doc__
     getcwd = staticmethod(getcwd)
 
     def abspath(self):
         return ifile(path.path.abspath(self))
     abspath.__doc__ = path.path.abspath.__doc__
 
     def normcase(self):
         return ifile(path.path.normcase(self))
     normcase.__doc__ = path.path.normcase.__doc__
 
     def normpath(self):
         return ifile(path.path.normpath(self))
     normpath.__doc__ = path.path.normpath.__doc__
 
     def realpath(self):
         return ifile(path.path.realpath(self))
     realpath.__doc__ = path.path.realpath.__doc__
 
     def expanduser(self):
         return ifile(path.path.expanduser(self))
     expanduser.__doc__ = path.path.expanduser.__doc__
 
     def expandvars(self):
         return ifile(path.path.expandvars(self))
     expandvars.__doc__ = path.path.expandvars.__doc__
 
     def dirname(self):
         return ifile(path.path.dirname(self))
     dirname.__doc__ = path.path.dirname.__doc__
 
     parent = property(dirname, None, None, path.path.parent.__doc__)
 
     def splitpath(self):
         (parent, child) = path.path.splitpath(self)
         return (ifile(parent), child)
     splitpath.__doc__ = path.path.splitpath.__doc__
 
     def splitdrive(self):
         (drive, rel) = path.path.splitdrive(self)
         return (ifile(drive), rel)
     splitdrive.__doc__ = path.path.splitdrive.__doc__
 
     def splitext(self):
         (filename, ext) = path.path.splitext(self)
         return (ifile(filename), ext)
     splitext.__doc__ = path.path.splitext.__doc__
 
     if hasattr(path.path, "splitunc"):
         def splitunc(self):
             (unc, rest) = path.path.splitunc(self)
             return (ifile(unc), rest)
         splitunc.__doc__ = path.path.splitunc.__doc__
 
         def _get_uncshare(self):
             unc, r = os.path.splitunc(self)
             return ifile(unc)
 
         uncshare = property(
             _get_uncshare, None, None,
             """ The UNC mount point for this path.
             This is empty for paths on local drives. """)
 
     def joinpath(self, *args):
         return ifile(path.path.joinpath(self, *args))
     joinpath.__doc__ = path.path.joinpath.__doc__
 
     def splitall(self):
         return map(ifile, path.path.splitall(self))
     splitall.__doc__ = path.path.splitall.__doc__
 
     def relpath(self):
         return ifile(path.path.relpath(self))
     relpath.__doc__ = path.path.relpath.__doc__
 
     def relpathto(self, dest):
         return ifile(path.path.relpathto(self, dest))
     relpathto.__doc__ = path.path.relpathto.__doc__
 
     def listdir(self, pattern=None):
         return [ifile(child) for child in path.path.listdir(self, pattern)]
     listdir.__doc__ = path.path.listdir.__doc__
 
     def dirs(self, pattern=None):
         return [ifile(child) for child in path.path.dirs(self, pattern)]
     dirs.__doc__ = path.path.dirs.__doc__
 
     def files(self, pattern=None):
         return [ifile(child) for child in path.path.files(self, pattern)]
     files.__doc__ = path.path.files.__doc__
 
     def walk(self, pattern=None):
         for child in path.path.walk(self, pattern):
             yield ifile(child)
     walk.__doc__ = path.path.walk.__doc__
 
     def walkdirs(self, pattern=None):
         for child in path.path.walkdirs(self, pattern):
             yield ifile(child)
     walkdirs.__doc__ = path.path.walkdirs.__doc__
 
     def walkfiles(self, pattern=None):
         for child in path.path.walkfiles(self, pattern):
             yield ifile(child)
     walkfiles.__doc__ = path.path.walkfiles.__doc__
 
     def glob(self, pattern):
         return map(ifile, path.path.glob(self, pattern))
     glob.__doc__ = path.path.glob.__doc__
 
     if hasattr(os, 'readlink'):
         def readlink(self):
             return ifile(path.path.readlink(self))
         readlink.__doc__ = path.path.readlink.__doc__
 
         def readlinkabs(self):
             return ifile(path.path.readlinkabs(self))
         readlinkabs.__doc__ = path.path.readlinkabs.__doc__
 
     def getmode(self):
         return self.stat().st_mode
     mode = property(getmode, None, None, "Access mode")
 
     def gettype(self):
         data = [
             (stat.S_ISREG, "file"),
             (stat.S_ISDIR, "dir"),
             (stat.S_ISCHR, "chardev"),
             (stat.S_ISBLK, "blockdev"),
             (stat.S_ISFIFO, "fifo"),
             (stat.S_ISLNK, "symlink"),
             (stat.S_ISSOCK,"socket"),
         ]
         lstat = self.lstat()
         if lstat is not None:
             types = set([text for (func, text) in data if func(lstat.st_mode)])
         else:
             types = set()
         m = self.mode
         types.update([text for (func, text) in data if func(m)])
         return ", ".join(types)
     type = property(gettype, None, None, "file type (file, directory, link, etc.)")
 
     def getmodestr(self):
         m = self.mode
         data = [
             (stat.S_IRUSR, "-r"),
             (stat.S_IWUSR, "-w"),
             (stat.S_IXUSR, "-x"),
             (stat.S_IRGRP, "-r"),
             (stat.S_IWGRP, "-w"),
             (stat.S_IXGRP, "-x"),
             (stat.S_IROTH, "-r"),
             (stat.S_IWOTH, "-w"),
             (stat.S_IXOTH, "-x"),
         ]
         return "".join([text[bool(m&bit)] for (bit, text) in data])
 
     modestr = property(getmodestr, None, None, "Access mode as string")
 
     def getblocks(self):
         return self.stat().st_blocks
     blocks = property(getblocks, None, None, "File size in blocks")
 
     def getblksize(self):
         return self.stat().st_blksize
     blksize = property(getblksize, None, None, "Filesystem block size")
 
     def getdev(self):
         return self.stat().st_dev
     dev = property(getdev)
 
     def getnlink(self):
         return self.stat().st_nlink
     nlink = property(getnlink, None, None, "Number of links")
 
     def getuid(self):
         return self.stat().st_uid
     uid = property(getuid, None, None, "User id of file owner")
 
     def getgid(self):
         return self.stat().st_gid
     gid = property(getgid, None, None, "Group id of file owner")
 
     def getowner(self):
         stat = self.stat()
         try:
             return pwd.getpwuid(stat.st_uid).pw_name
         except KeyError:
             return stat.st_uid
     owner = property(getowner, None, None, "Owner name (or id)")
 
     def getgroup(self):
         stat = self.stat()
         try:
             return grp.getgrgid(stat.st_gid).gr_name
         except KeyError:
             return stat.st_gid
     group = property(getgroup, None, None, "Group name (or id)")
 
     def getadate(self):
         return datetime.datetime.utcfromtimestamp(self.atime)
     adate = property(getadate, None, None, "Access date")
 
     def getcdate(self):
         return datetime.datetime.utcfromtimestamp(self.ctime)
     cdate = property(getcdate, None, None, "Creation date")
 
     def getmdate(self):
         return datetime.datetime.utcfromtimestamp(self.mtime)
     mdate = property(getmdate, None, None, "Modification date")
 
     def getmimetype(self):
         return mimetypes.guess_type(self.basename())[0]
     mimetype = property(getmimetype, None, None, "MIME type")
 
     def getencoding(self):
         return mimetypes.guess_type(self.basename())[1]
     encoding = property(getencoding, None, None, "Compression")
 
     def __repr__(self):
         return "ifile(%s)" % path._base.__repr__(self)
 
     defaultattrs = (None, "type", "size", "modestr", "owner", "group", "mdate")
 
     def __xattrs__(self, mode):
         if mode == "detail":
             return (
                 "name", "basename()", "abspath()", "realpath()",
                 "type", "mode", "modestr", "stat()", "lstat()",
                 "uid", "gid", "owner", "group", "dev", "nlink",
                 "ctime", "mtime", "atime", "cdate", "mdate", "adate",
                 "size", "blocks", "blksize", "isdir()", "islink()",
                 "mimetype", "encoding"
             )
         return self.defaultattrs
 
     def __xrepr__(self, mode):
         try:
             if self.isdir():
                 name = "idir"
                 style = astyle.style_dir
             else:
                 name = "ifile"
                 style = astyle.style_file
         except IOError:
             name = "ifile"
             style = astyle.style_default
         if mode == "cell" or mode in "header" or mode == "footer":
             abspath = repr(path._base(self.normpath()))
             if abspath.startswith("u"):
                 abspath = abspath[2:-1]
             else:
                 abspath = abspath[1:-1]
             if mode == "cell":
                 yield (style, abspath)
             else:
                 yield (style, "%s(%s)" % (name, abspath))
         else:
             yield (style, repr(self))
 
     def __xiter__(self, mode):
         if self.isdir():
             yield iparentdir(self / os.pardir)
             for child in sorted(self.listdir()):
                 yield child
         else:
             f = self.open("rb")
             for line in f:
                 yield line
             f.close()
 
 
 class iparentdir(ifile):
     def __xrepr__(self, mode):
         if mode == "cell":
             yield (astyle.style_dir, os.pardir)
         else:
             for part in ifile.__xrepr__(self, mode):
                 yield part
 
 
 class ils(Table):
     """
     List the current (or a specific) directory.
 
     Examples:
 
         >>> ils
         >>> ils("/usr/local/lib/python2.4")
         >>> ils("~")
     """
     def __init__(self, base=os.curdir):
         self.base = os.path.expanduser(base)
 
     def __xiter__(self, mode):
         return xiter(ifile(self.base), mode)
 
     def __xrepr__(self, mode):
        return ifile(self.base).__xrepr__(mode)
 
     def __repr__(self):
         return "%s.%s(%r)" % \
             (self.__class__.__module__, self.__class__.__name__, self.base)
 
 
 class iglob(Table):
     """
     List all files and directories matching a specified pattern.
     (See ``glob.glob()`` for more info.).
 
     Examples:
 
         >>> iglob("*.py")
     """
     def __init__(self, glob):
         self.glob = glob
 
     def __xiter__(self, mode):
         for name in glob.glob(self.glob):
             yield ifile(name)
 
     def __xrepr__(self, mode):
         if mode == "header" or mode == "footer" or mode == "cell":
             yield (astyle.style_default,
                    "%s(%r)" % (self.__class__.__name__, self.glob))
         else:
             yield (astyle.style_default, repr(self))
 
     def __repr__(self):
         return "%s.%s(%r)" % \
             (self.__class__.__module__, self.__class__.__name__, self.glob)
 
 
 class iwalk(Table):
     """
     List all files and directories in a directory and it's subdirectory.
 
         >>> iwalk
         >>> iwalk("/usr/local/lib/python2.4")
         >>> iwalk("~")
     """
     def __init__(self, base=os.curdir, dirs=True, files=True):
         self.base = os.path.expanduser(base)
         self.dirs = dirs
         self.files = files
 
     def __xiter__(self, mode):
         for (dirpath, dirnames, filenames) in os.walk(self.base):
             if self.dirs:
                 for name in sorted(dirnames):
                     yield ifile(os.path.join(dirpath, name))
             if self.files:
                 for name in sorted(filenames):
                     yield ifile(os.path.join(dirpath, name))
 
     def __xrepr__(self, mode):
         if mode == "header" or mode == "footer" or mode == "cell":
             yield (astyle.style_default,
                    "%s(%r)" % (self.__class__.__name__, self.base))
         else:
             yield (astyle.style_default, repr(self))
 
     def __repr__(self):
         return "%s.%s(%r)" % \
             (self.__class__.__module__, self.__class__.__name__, self.base)
 
 
 class ipwdentry(object):
     """
     ``ipwdentry`` objects encapsulate entries in the Unix user account and
     password database.
     """
     def __init__(self, id):
         self._id = id
         self._entry = None
 
     def _getentry(self):
         if self._entry is None:
             if isinstance(self._id, basestring):
                 self._entry = pwd.getpwnam(self._id)
             else:
                 self._entry = pwd.getpwuid(self._id)
         return self._entry
 
     def getname(self):
         if isinstance(self._id, basestring):
             return self._id
         else:
             return self._getentry().pw_name
     name = property(getname, None, None, "User name")
 
     def getpasswd(self):
         return self._getentry().pw_passwd
     passwd = property(getpasswd, None, None, "Password")
 
     def getuid(self):
         if isinstance(self._id, basestring):
             return self._getentry().pw_uid
         else:
             return self._id
     uid = property(getuid, None, None, "User id")
 
     def getgid(self):
         return self._getentry().pw_gid
     gid = property(getgid, None, None, "Primary group id")
 
     def getgroup(self):
         return igrpentry(self.gid)
     group = property(getgroup, None, None, "Group")
 
     def getgecos(self):
         return self._getentry().pw_gecos
     gecos = property(getgecos, None, None, "Information (e.g. full user name)")
 
     def getdir(self):
         return self._getentry().pw_dir
     dir = property(getdir, None, None, "$HOME directory")
 
     def getshell(self):
         return self._getentry().pw_shell
     shell = property(getshell, None, None, "Login shell")
 
     def __xattrs__(self, mode):
         return ("name", "passwd", "uid", "gid", "gecos", "dir", "shell")
 
     def __repr__(self):
         return "%s.%s(%r)" % \
             (self.__class__.__module__, self.__class__.__name__, self._id)
 
 
 class ipwd(Table):
     """
     List all entries in the Unix user account and password database.
 
     Example:
 
         >>> ipwd | isort("uid")
     """
     def __iter__(self):
         for entry in pwd.getpwall():
             yield ipwdentry(entry.pw_name)
 
     def __xrepr__(self, mode):
         if mode == "header" or mode == "footer" or mode == "cell":
             yield (astyle.style_default, "%s()" % self.__class__.__name__)
         else:
             yield (astyle.style_default, repr(self))
 
 
 class igrpentry(object):
     """
     ``igrpentry`` objects encapsulate entries in the Unix group database.
     """
     def __init__(self, id):
         self._id = id
         self._entry = None
 
     def _getentry(self):
         if self._entry is None:
             if isinstance(self._id, basestring):
                 self._entry = grp.getgrnam(self._id)
             else:
                 self._entry = grp.getgrgid(self._id)
         return self._entry
 
     def getname(self):
         if isinstance(self._id, basestring):
             return self._id
         else:
             return self._getentry().gr_name
     name = property(getname, None, None, "Group name")
 
     def getpasswd(self):
         return self._getentry().gr_passwd
     passwd = property(getpasswd, None, None, "Password")
 
     def getgid(self):
         if isinstance(self._id, basestring):
             return self._getentry().gr_gid
         else:
             return self._id
     gid = property(getgid, None, None, "Group id")
 
     def getmem(self):
         return self._getentry().gr_mem
     mem = property(getmem, None, None, "Members")
 
     def __xattrs__(self, mode):
         return ("name", "passwd", "gid", "mem")
 
     def __xrepr__(self, mode):
         if mode == "header" or mode == "footer" or mode == "cell":
             yield (astyle.style_default, "group ")
             try:
                 yield (astyle.style_default, self.name)
             except KeyError:
                 if isinstance(self._id, basestring):
                     yield (astyle.style_default, self.name_id)
                 else:
                     yield (astyle.style_type_number, str(self._id))
         else:
             yield (astyle.style_default, repr(self))
 
     def __xiter__(self, mode):
         for member in self.mem:
             yield ipwdentry(member)
 
     def __repr__(self):
         return "%s.%s(%r)" % \
             (self.__class__.__module__, self.__class__.__name__, self._id)
 
 
 class igrp(Table):
     """
     This ``Table`` lists all entries in the Unix group database.
     """
     def __xiter__(self, mode):
         for entry in grp.getgrall():
             yield igrpentry(entry.gr_name)
 
     def __xrepr__(self, mode):
         if mode == "header" or mode == "footer":
             yield (astyle.style_default, "%s()" % self.__class__.__name__)
         else:
             yield (astyle.style_default, repr(self))
 
 
 class Fields(object):
     def __init__(self, fieldnames, **fields):
         self.__fieldnames = fieldnames
         for (key, value) in fields.iteritems():
             setattr(self, key, value)
 
     def __xattrs__(self, mode):
         return self.__fieldnames
 
     def __xrepr__(self, mode):
         yield (-1, False)
         if mode == "header" or mode == "cell":
             yield (astyle.style_default, self.__class__.__name__)
             yield (astyle.style_default, "(")
             for (i, f) in enumerate(self.__fieldnames):
                 if i:
                     yield (astyle.style_default, ", ")
                 yield (astyle.style_default, f)
                 yield (astyle.style_default, "=")
                 for part in xrepr(getattr(self, f), "default"):
                     yield part
             yield (astyle.style_default, ")")
         elif mode == "footer":
             yield (astyle.style_default, self.__class__.__name__)
             yield (astyle.style_default, "(")
             for (i, f) in enumerate(self.__fieldnames):
                 if i:
                     yield (astyle.style_default, ", ")
                 yield (astyle.style_default, f)
             yield (astyle.style_default, ")")
         else:
             yield (astyle.style_default, repr(self))
 
 
 class FieldTable(Table, list):
     def __init__(self, *fields):
         Table.__init__(self)
         list.__init__(self)
         self.fields = fields
 
     def add(self, **fields):
         self.append(Fields(self.fields, **fields))
 
     def __xiter__(self, mode):
         return list.__iter__(self)
 
     def __xrepr__(self, mode):
         yield (-1, False)
         if mode == "header" or mode == "footer":
             yield (astyle.style_default, self.__class__.__name__)
             yield (astyle.style_default, "(")
             for (i, f) in enumerate(self.__fieldnames):
                 if i:
                     yield (astyle.style_default, ", ")
                 yield (astyle.style_default, f)
             yield (astyle.style_default, ")")
         else:
             yield (astyle.style_default, repr(self))
 
     def __repr__(self):
         return "<%s.%s object with fields=%r at 0x%x>" % \
             (self.__class__.__module__, self.__class__.__name__,
              ", ".join(map(repr, self.fields)), id(self))
 
 
 class List(list):
     def __xattrs__(self, mode):
         return xrange(len(self))
 
     def __xrepr__(self, mode):
         yield (-1, False)
         if mode == "header" or mode == "cell" or mode == "footer" or mode == "default":
             yield (astyle.style_default, self.__class__.__name__)
             yield (astyle.style_default, "(")
             for (i, item) in enumerate(self):
                 if i:
                     yield (astyle.style_default, ", ")
                 for part in xrepr(item, "default"):
                     yield part
             yield (astyle.style_default, ")")
         else:
             yield (astyle.style_default, repr(self))
 
 
 class ienv(Table):
     """
     List environment variables.
 
     Example:
 
         >>> ienv
     """
 
     def __xiter__(self, mode):
         fields = ("key", "value")
         for (key, value) in os.environ.iteritems():
             yield Fields(fields, key=key, value=value)
 
     def __xrepr__(self, mode):
         if mode == "header" or mode == "cell":
             yield (astyle.style_default, "%s()" % self.__class__.__name__)
         else:
             yield (astyle.style_default, repr(self))
 
 
 class icsv(Pipe):
     """
     This ``Pipe`` lists turn the input (with must be a pipe outputting lines
     or an ``ifile``) into lines of CVS columns.
     """
     def __init__(self, **csvargs):
         """
         Create an ``icsv`` object. ``cvsargs`` will be passed through as
         keyword arguments to ``cvs.reader()``.
         """
         self.csvargs = csvargs
 
     def __xiter__(self, mode):
         input = self.input
         if isinstance(input, ifile):
             input = input.open("rb")
         reader = csv.reader(input, **self.csvargs)
         for line in reader:
             yield List(line)
 
     def __xrepr__(self, mode):
         yield (-1, False)
         if mode == "header" or mode == "footer":
             input = getattr(self, "input", None)
             if input is not None:
                 for part in xrepr(input, mode):
                     yield part
                 yield (astyle.style_default, " | ")
             yield (astyle.style_default, "%s(" % self.__class__.__name__)
             for (i, (name, value)) in enumerate(self.csvargs.iteritems()):
                 if i:
                     yield (astyle.style_default, ", ")
                 yield (astyle.style_default, name)
                 yield (astyle.style_default, "=")
                 for part in xrepr(value, "default"):
                     yield part
             yield (astyle.style_default, ")")
         else:
             yield (astyle.style_default, repr(self))
 
     def __repr__(self):
         args = ", ".join(["%s=%r" % item for item in self.csvargs.iteritems()])
         return "<%s.%s %s at 0x%x>" % \
         (self.__class__.__module__, self.__class__.__name__, args, id(self))
 
 
 class ix(Table):
     """
     Execute a system command and list its output as lines
     (similar to ``os.popen()``).
 
     Examples:
 
         >>> ix("ps x")
         >>> ix("find .") | ifile
     """
     def __init__(self, cmd):
         self.cmd = cmd
         self._pipe = None
 
     def __xiter__(self, mode):
         self._pipe = os.popen(self.cmd)
         for l in self._pipe:
             yield l.rstrip("\r\n")
         self._pipe.close()
         self._pipe = None
 
     def __del__(self):
         if self._pipe is not None and not self._pipe.closed:
             self._pipe.close()
         self._pipe = None
 
     def __xrepr__(self, mode):
         if mode == "header" or mode == "footer":
             yield (astyle.style_default,
                    "%s(%r)" % (self.__class__.__name__, self.cmd))
         else:
             yield (astyle.style_default, repr(self))
 
     def __repr__(self):
         return "%s.%s(%r)" % \
             (self.__class__.__module__, self.__class__.__name__, self.cmd)
 
 
 class ifilter(Pipe):
     """
     Filter an input pipe. Only objects where an expression evaluates to true
     (and doesn't raise an exception) are listed.
 
     Examples:
 
         >>> ils | ifilter("_.isfile() and size>1000")
         >>> igrp | ifilter("len(mem)")
         >>> sys.modules | ifilter(lambda _:_.value is not None)
     """
 
     def __init__(self, expr, globals=None, errors="raiseifallfail"):
         """
         Create an ``ifilter`` object. ``expr`` can be a callable or a string
         containing an expression. ``globals`` will be used as the global
         namespace for calling string expressions (defaulting to IPython's
         user namespace). ``errors`` specifies how exception during evaluation
         of ``expr`` are handled:
 
         * ``drop``: drop all items that have errors;
 
         * ``keep``: keep all items that have errors;
 
         * ``keeperror``: keep the exception of all items that have errors;
 
         * ``raise``: raise the exception;
 
         * ``raiseifallfail``: raise the first exception if all items have errors;
           otherwise drop those with errors (this is the default).
         """
         self.expr = expr
         self.globals = globals
         self.errors = errors
 
     def __xiter__(self, mode):
         if callable(self.expr):
             def test(item):
                 return self.expr(item)
         else:
             g = getglobals(self.globals)
             def test(item):
                 return eval(self.expr, g, AttrNamespace(item))
 
         ok = 0
         exc_info = None
         for item in xiter(self.input, mode):
             try:
                 if test(item):
                     yield item
                 ok += 1
             except (KeyboardInterrupt, SystemExit):
                 raise
             except Exception, exc:
                 if self.errors == "drop":
                     pass # Ignore errors
                 elif self.errors == "keep":
                     yield item
                 elif self.errors == "keeperror":
                     yield exc
                 elif self.errors == "raise":
                     raise
                 elif self.errors == "raiseifallfail":
                     if exc_info is None:
                         exc_info = sys.exc_info()
         if not ok and exc_info is not None:
             raise exc_info[0], exc_info[1], exc_info[2]
 
     def __xrepr__(self, mode):
         if mode == "header" or mode == "footer":
             input = getattr(self, "input", None)
             if input is not None:
                 for part in xrepr(input, mode):
                     yield part
                 yield (astyle.style_default, " | ")
             yield (astyle.style_default, "%s(" % self.__class__.__name__)
             for part in xrepr(self.expr, "default"):
                 yield part
             yield (astyle.style_default, ")")
         else:
             yield (astyle.style_default, repr(self))
 
     def __repr__(self):
         return "<%s.%s expr=%r at 0x%x>" % \
             (self.__class__.__module__, self.__class__.__name__,
              self.expr, id(self))
 
 
 class ieval(Pipe):
     """
     Evaluate an expression for each object in the input pipe.
 
     Examples:
 
         >>> ils | ieval("_.abspath()")
         >>> sys.path | ieval(ifile)
     """
 
     def __init__(self, expr, globals=None, errors="raiseifallfail"):
         """
         Create an ``ieval`` object. ``expr`` can be a callable or a string
         containing an expression. For the meaning of ``globals`` and
         ``errors`` see ``ifilter``.
         """
         self.expr = expr
         self.globals = globals
         self.errors = errors
 
     def __xiter__(self, mode):
         if callable(self.expr):
             def do(item):
                 return self.expr(item)
         else:
             g = getglobals(self.globals)
             def do(item):
                 return eval(self.expr, g, AttrNamespace(item))
 
         ok = 0
         exc_info = None
         for item in xiter(self.input, mode):
             try:
                 yield do(item)
             except (KeyboardInterrupt, SystemExit):
                 raise
             except Exception, exc:
                 if self.errors == "drop":
                     pass # Ignore errors
                 elif self.errors == "keep":
                     yield item
                 elif self.errors == "keeperror":
                     yield exc
                 elif self.errors == "raise":
                     raise
                 elif self.errors == "raiseifallfail":
                     if exc_info is None:
                         exc_info = sys.exc_info()
         if not ok and exc_info is not None:
             raise exc_info[0], exc_info[1], exc_info[2]
 
     def __xrepr__(self, mode):
         if mode == "header" or mode == "footer":
             input = getattr(self, "input", None)
             if input is not None:
                 for part in xrepr(input, mode):
                     yield part
                 yield (astyle.style_default, " | ")
             yield (astyle.style_default, "%s(" % self.__class__.__name__)
             for part in xrepr(self.expr, "default"):
                 yield part
             yield (astyle.style_default, ")")
         else:
             yield (astyle.style_default, repr(self))
 
     def __repr__(self):
         return "<%s.%s expr=%r at 0x%x>" % \
             (self.__class__.__module__, self.__class__.__name__,
              self.expr, id(self))
 
 
 class ienum(Pipe):
     """
     Enumerate the input pipe (i.e. wrap each input object in an object
     with ``index`` and ``object`` attributes).
 
     Examples:
 
         >>> xrange(20) | ieval("_,_*_") | ienum | ifilter("index % 2 == 0") | ieval("object")
     """
     def __xiter__(self, mode):
         fields = ("index", "object")
         for (index, object) in enumerate(xiter(self.input, mode)):
             yield Fields(fields, index=index, object=object)
 
 
 class isort(Pipe):
     """
     Sorts the input pipe.
 
     Examples:
 
         >>> ils | isort("size")
         >>> ils | isort("_.isdir(), _.lower()", reverse=True)
     """
 
     def __init__(self, key, globals=None, reverse=False):
         """
         Create an ``isort`` object. ``key`` can be a callable or a string
         containing an expression. If ``reverse`` is true the sort order will
         be reversed. For the meaning of ``globals`` see ``ifilter``.
         """
         self.key = key
         self.globals = globals
         self.reverse = reverse
 
     def __xiter__(self, mode):
         if callable(self.key):
             items = sorted(
                 xiter(self.input, mode),
                 key=self.key,
                 reverse=self.reverse
             )
         else:
             g = getglobals(self.globals)
             def key(item):
                 return eval(self.key, g, AttrNamespace(item))
             items = sorted(
                 xiter(self.input, mode),
                 key=key,
                 reverse=self.reverse
             )
         for item in items:
             yield item
 
     def __xrepr__(self, mode):
         if mode == "header" or mode == "footer":
             input = getattr(self, "input", None)
             if input is not None:
                 for part in xrepr(input, mode):
                     yield part
                 yield (astyle.style_default, " | ")
             yield (astyle.style_default, "%s(" % self.__class__.__name__)
             for part in xrepr(self.key, "default"):
                 yield part
             if self.reverse:
                 yield (astyle.style_default, ", ")
                 for part in xrepr(True, "default"):
                     yield part
             yield (astyle.style_default, ")")
         else:
             yield (astyle.style_default, repr(self))
 
     def __repr__(self):
         return "<%s.%s key=%r reverse=%r at 0x%x>" % \
             (self.__class__.__module__, self.__class__.__name__,
              self.key, self.reverse, id(self))
 
 
 tab = 3 # for expandtabs()
 
 def _format(field):
     if isinstance(field, str):
         text = repr(field.expandtabs(tab))[1:-1]
     elif isinstance(field, unicode):
         text = repr(field.expandtabs(tab))[2:-1]
     elif isinstance(field, datetime.datetime):
         # Don't use strftime() here, as this requires year >= 1900
         text = "%04d-%02d-%02d %02d:%02d:%02d.%06d" % \
             (field.year, field.month, field.day,
              field.hour, field.minute, field.second, field.microsecond)
     elif isinstance(field, datetime.date):
         text = "%04d-%02d-%02d" % (field.year, field.month, field.day)
     else:
         text = repr(field)
     return text
 
 
 class Display(object):
     class __metaclass__(type):
         def __ror__(self, input):
             return input | self()
 
     def __ror__(self, input):
         self.input = input
         return self
 
     def display(self):
         pass
 
 
 class iless(Display):
     cmd = "less --quit-if-one-screen --LONG-PROMPT --LINE-NUMBERS --chop-long-lines --shift=8 --RAW-CONTROL-CHARS"
 
     def display(self):
         try:
             pager = os.popen(self.cmd, "w")
             try:
                 for item in xiter(self.input, "default"):
                     attrs = xattrs(item, "default")
                     attrs = ["%s=%s" % (a, _format(_getattr(item, a))) for a in attrs]
                     pager.write(" ".join(attrs))
                     pager.write("\n")
             finally:
                 pager.close()
         except Exception, exc:
             print "%s: %s" % (exc.__class__.__name__, str(exc))
 
 
 def xformat(value, mode, maxlength):
     align = None
     full = True
     width = 0
     text = astyle.Text()
     for (style, part) in xrepr(value, mode):
         # only consider the first result
         if align is None:
             if isinstance(style, int):
                 # (style, text) really is (alignment, stop)
                 align = style
                 full = part
                 continue
             else:
                 align = -1
                 full = True
         if not isinstance(style, int):
             text.append((style, part))
             width += len(part)
             if width >= maxlength and not full:
                 text.append((astyle.style_ellisis, "..."))
                 width += 3
                 break
     if align is None: # default to left alignment
         align = -1
     return (align, width, text)
 
 
 class idump(Display):
     # The approximate maximum length of a column entry
     maxattrlength = 200
 
     # Style for column names
     style_header = astyle.Style.fromstr("white:black:bold")
 
     def __init__(self, *attrs):
         self.attrs = attrs
         self.headerpadchar = " "
         self.headersepchar = "|"
         self.datapadchar = " "
         self.datasepchar = "|"
 
     def display(self):
         stream = genutils.Term.cout
         allattrs = []
         allattrset = set()
         colwidths = {}
         rows = []
         for item in xiter(self.input, "default"):
             row = {}
             attrs = self.attrs
             if not attrs:
                 attrs = xattrs(item, "default")
             for attrname in attrs:
                 if attrname not in allattrset:
                     allattrs.append(attrname)
                     allattrset.add(attrname)
                     colwidths[attrname] = len(_attrname(attrname))
                 try:
                     value = _getattr(item, attrname, None)
                 except (KeyboardInterrupt, SystemExit):
                     raise
                 except Exception, exc:
                     value = exc
                 (align, width, text) = xformat(value, "cell", self.maxattrlength)
                 colwidths[attrname] = max(colwidths[attrname], width)
                 # remember alignment, length and colored parts
                 row[attrname] = (align, width, text)
             rows.append(row)
 
         stream.write("\n")
         for (i, attrname) in enumerate(allattrs):
             self.style_header(_attrname(attrname)).write(stream)
             spc = colwidths[attrname] - len(_attrname(attrname))
             if i < len(colwidths)-1:
                 stream.write(self.headerpadchar*spc)
                 stream.write(self.headersepchar)
         stream.write("\n")
 
         for row in rows:
             for (i, attrname) in enumerate(allattrs):
                 (align, width, text) = row[attrname]
                 spc = colwidths[attrname] - width
                 if align == -1:
                     text.write(stream)
                     if i < len(colwidths)-1:
                         stream.write(self.datapadchar*spc)
                 elif align == 0:
                     spc = colwidths[attrname] - width
                     spc1 = spc//2
                     spc2 = spc-spc1
                     stream.write(self.datapadchar*spc1)
                     text.write(stream)
                     if i < len(colwidths)-1:
                         stream.write(self.datapadchar*spc2)
                 else:
                     stream.write(self.datapadchar*spc)
                     text.write(stream)
                 if i < len(colwidths)-1:
                     stream.write(self.datasepchar)
             stream.write("\n")
 
 
 class XMode(object):
     """
     An ``XMode`` object describes one enter mode available for an object
     """
     def __init__(self, object, mode, title=None, description=None):
         """
         Create a new ``XMode`` object for the object ``object``. This object
         must support the enter mode ``mode`` (i.e. ``object.__xiter__(mode)``
         must return an iterable). ``title`` and ``description`` will be
         displayed in the browser when selecting among the available modes.
         """
         self.object = object
         self.mode = mode
         self.title = title
         self.description = description
 
     def __repr__(self):
         return "<%s.%s object mode=%r at 0x%x>" % \
             (self.__class__.__module__, self.__class__.__name__,
              self.mode, id(self))
 
     def __xrepr__(self, mode):
         if mode == "header" or mode == "footer":
             yield (astyle.style_default, self.title)
         else:
             yield (astyle.style_default, repr(self))
 
     def __xattrs__(self, mode):
         if mode == "detail":
             return ("object", "mode", "title", "description")
         return ("title", "description")
 
     def __xiter__(self, mode):
         return xiter(self.object, self.mode)
 
 
 class XAttr(object):
     def __init__(self, object, name):
         self.name = _attrname(name)
 
         try:
             self.value = _getattr(object, name)
         except (KeyboardInterrupt, SystemExit):
             raise
         except Exception, exc:
             if exc.__class__.__module__ == "exceptions":
                 self.value = exc.__class__.__name__
             else:
                 self.value = "%s.%s" % \
                     (exc.__class__.__module__, exc.__class__.__name__)
             self.type = self.value
         else:
             t = type(self.value)
             if t.__module__ == "__builtin__":
                 self.type = t.__name__
             else:
                 self.type = "%s.%s" % (t.__module__, t.__name__)
 
         doc = None
         if isinstance(name, basestring):
             if name.endswith("()"):
                 doc = getattr(getattr(object, name[:-2]), "__doc__", None)
             else:
                 try:
                     meta = getattr(type(object), name)
                 except AttributeError:
                     pass
                 else:
                     if isinstance(meta, property):
                         doc = getattr(meta, "__doc__", None)
         elif callable(name):
             doc = getattr(name, "__doc__", None)
         if isinstance(doc, basestring):
             doc = doc.strip()
         self.doc = doc
 
     def __xattrs__(self, mode):
         return ("name", "type", "doc", "value")
 
 
 try:
     from ibrowse import ibrowse
 except ImportError:
     # No curses (probably Windows) => use ``idump`` as the default display.
     defaultdisplay = idump
 else:
     defaultdisplay = ibrowse
     __all__.append("ibrowse")
 
 
 # If we're running under IPython, install an IPython displayhook that
 # returns the object from Display.display(), else install a displayhook
 # directly as sys.displayhook
 api = None
 if ipapi is not None:
     try:
         api = ipapi.get()
     except AttributeError:
         pass
 
 if api is not None:
     def displayhook(self, obj):
         if isinstance(obj, type) and issubclass(obj, Table):
             obj = obj()
         if isinstance(obj, Table):
             obj = obj | defaultdisplay
         if isinstance(obj, Display):
             return obj.display()
         else:
             raise ipapi.TryNext
     api.set_hook("result_display", displayhook)
 else:
     def installdisplayhook():
         _originalhook = sys.displayhook
         def displayhook(obj):
             if isinstance(obj, type) and issubclass(obj, Table):
                 obj = obj()
             if isinstance(obj, Table):
                 obj = obj | defaultdisplay
             if isinstance(obj, Display):
                 return obj.display()
             else:
                 _originalhook(obj)
         sys.displayhook = displayhook
     installdisplayhook()

IPython/Extensions/ipy_system_conf.py

@@ -1,24 +1,24 b''
 """ System wide configuration file for IPython.
 
 This will be imported by ipython for all users.
 
 After this ipy_user_conf.py is imported, user specific configuration
 should reside there. 
 
  """
 
 import IPython.ipapi
 ip = IPython.ipapi.get()
 
 # add system wide configuration information, import extensions etc. here.
 # nothing here is essential 
 
 import sys
 
 import ext_rehashdir # %rehashdir magic
 import ext_rescapture # var = !ls and var = %magic
 import pspersistence # %store magic
 import clearcmd # %clear
 # Basic readline config
 
-o = ip.options()
  No newline at end of file
+o = ip.options

IPython/Extensions/pspersistence.py

@@ -1,176 +1,176 b''
 # -*- coding: utf-8 -*-
 """
 %store magic for lightweight persistence.
 
 Stores variables, aliases etc. in PickleShare database.
 
 $Id: iplib.py 1107 2006-01-30 19:02:20Z vivainio $
 """
 
 import IPython.ipapi
 ip = IPython.ipapi.get()
 
 import pickleshare
 
 import inspect,pickle,os,sys,textwrap
 from IPython.FakeModule import FakeModule
 
 def restore_aliases(self):
     ip = self.getapi()
-    staliases = ip.getdb().get('stored_aliases', {})
+    staliases = ip.db.get('stored_aliases', {})
     for k,v in staliases.items():
         #print "restore alias",k,v # dbg
         self.alias_table[k] = v
 
 
 def refresh_variables(ip):
-    db = ip.getdb()
+    db = ip.db
     for key in db.keys('autorestore/*'):
         # strip autorestore
         justkey = os.path.basename(key)
         try:
             obj = db[key]
         except KeyError:
             print "Unable to restore variable '%s', ignoring (use %%store -d to forget!)" % justkey
             print "The error was:",sys.exc_info()[0]
         else:
             #print "restored",justkey,"=",obj #dbg
-            ip.user_ns()[justkey] = obj
+            ip.user_ns[justkey] = obj
     
     
 
 def restore_data(self):
     ip = self.getapi()
     refresh_variables(ip)
     restore_aliases(self)
     raise IPython.ipapi.TryNext
     
 ip.set_hook('late_startup_hook', restore_data)
 
 def magic_store(self, parameter_s=''):
     """Lightweight persistence for python variables.
 
     Example:
     
     ville@badger[~]|1> A = ['hello',10,'world']\\
     ville@badger[~]|2> %store A\\
     ville@badger[~]|3> Exit
     
     (IPython session is closed and started again...)
     
     ville@badger:~$ ipython -p pysh\\
     ville@badger[~]|1> print A
     
     ['hello', 10, 'world']
     
     Usage:
     
     %store          - Show list of all variables and their current values\\
     %store <var>    - Store the *current* value of the variable to disk\\
     %store -d <var> - Remove the variable and its value from storage\\
     %store -z       - Remove all variables from storage\\
     %store -r       - Refresh all variables from store (delete current vals)\\
     %store foo >a.txt  - Store value of foo to new file a.txt\\
     %store foo >>a.txt - Append value of foo to file a.txt\\   
     
     It should be noted that if you change the value of a variable, you
     need to %store it again if you want to persist the new value.
     
     Note also that the variables will need to be pickleable; most basic
     python types can be safely %stored.
     """
     
     opts,argsl = self.parse_options(parameter_s,'drz',mode='string')
     args = argsl.split(None,1)
     ip = self.getapi()
-    db = ip.getdb()
+    db = ip.db
     # delete
     if opts.has_key('d'):
         try:
             todel = args[0]
         except IndexError:
             error('You must provide the variable to forget')
         else:
             try:
                 del db['autorestore/' + todel]
             except:
                 error("Can't delete variable '%s'" % todel)
     # reset
     elif opts.has_key('z'):
         for k in db.keys('autorestore/*'):
             del db[k]
 
     elif opts.has_key('r'):
         refresh_variables(ip)
 
     
     # run without arguments -> list variables & values
     elif not args:
         vars = self.db.keys('autorestore/*')
         vars.sort()            
         if vars:
             size = max(map(len,vars))
         else:
             size = 0
             
         print 'Stored variables and their in-db values:'
         fmt = '%-'+str(size)+'s -> %s'
         get = db.get
         for var in vars:
             justkey = os.path.basename(var)
             # print 30 first characters from every var
             print fmt % (justkey,repr(get(var,'<unavailable>'))[:50])
     
     # default action - store the variable
     else:
         # %store foo >file.txt or >>file.txt
         if len(args) > 1 and args[1].startswith('>'):
             fnam = os.path.expanduser(args[1].lstrip('>').lstrip())
             if args[1].startswith('>>'):
                 fil = open(fnam,'a')
             else:
                 fil = open(fnam,'w')
             obj = ip.ev(args[0])
             print "Writing '%s' (%s) to file '%s'." % (args[0],
               obj.__class__.__name__, fnam)
 
             
             if not isinstance (obj,basestring):
                 from pprint import pprint
                 pprint(obj,fil)
             else:
                 fil.write(obj)
                 if not obj.endswith('\n'):
                     fil.write('\n')
             
             fil.close()
             return
         
         # %store foo
         try:
-            obj = ip.user_ns()[args[0]]
+            obj = ip.user_ns[args[0]]
         except KeyError:
             # it might be an alias
             if args[0] in self.alias_table:
                 staliases = db.get('stored_aliases',{})
                 staliases[ args[0] ] = self.alias_table[ args[0] ]
                 db['stored_aliases'] = staliases                
                 print "Alias stored:", args[0], self.alias_table[ args[0] ]
                 return
             else:
                 print "Error: unknown variable '%s'" % args[0]
             
         else:
             if isinstance(inspect.getmodule(obj), FakeModule):
                 print textwrap.dedent("""\
                 Warning:%s is %s 
                 Proper storage of interactively declared classes (or instances
                 of those classes) is not possible! Only instances
                 of classes in real modules on file system can be %%store'd.
                 """ % (args[0], obj) ) 
                 return
             #pickled = pickle.dumps(obj)
             self.db[ 'autorestore/' + args[0] ] = obj
             print "Stored '%s' (%s)" % (args[0], obj.__class__.__name__)
 
 ip.expose_magic('store',magic_store)

IPython/Magic.py

@@ -1,2952 +1,2953 b''
 # -*- coding: utf-8 -*-
 """Magic functions for InteractiveShell.
 
-$Id: Magic.py 1209 2006-03-12 20:34:28Z vivainio $"""
+$Id: Magic.py 1314 2006-05-19 18:24:14Z fperez $"""
 
 #*****************************************************************************
 #       Copyright (C) 2001 Janko Hauser <[e-mail]> and
 #       Copyright (C) 2001-2006 Fernando Perez <[e-mail]>
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #*****************************************************************************
 
 #****************************************************************************
 # Modules and globals
 
 from IPython import Release
 __author__  = '%s <%s>\n%s <%s>' % \
               ( Release.authors['Janko'] + Release.authors['Fernando'] )
 __license__ = Release.license
 
 # Python standard modules
 import __builtin__
 import bdb
 import inspect
 import os
 import pdb
 import pydoc
+import shlex
 import sys
 import re
 import tempfile
 import time
 import cPickle as pickle
 import textwrap
 from cStringIO import StringIO
 from getopt import getopt,GetoptError
 from pprint import pprint, pformat
 
 # profile isn't bundled by default in Debian for license reasons
 try:
     import profile,pstats
 except ImportError:
     profile = pstats = None
 
 # Homebrewed
 import IPython
 from IPython import Debugger, OInspect, wildcard
 from IPython.FakeModule import FakeModule
 from IPython.Itpl import Itpl, itpl, printpl,itplns
 from IPython.PyColorize import Parser
 from IPython.ipstruct import Struct
 from IPython.macro import Macro
 from IPython.genutils import *
 from IPython import platutils
 
 #***************************************************************************
 # Utility functions
 def on_off(tag):
     """Return an ON/OFF string for a 1/0 input. Simple utility function."""
     return ['OFF','ON'][tag]
 
 class Bunch: pass
 
 #***************************************************************************
 # Main class implementing Magic functionality
 class Magic:
     """Magic functions for InteractiveShell.
 
     Shell functions which can be reached as %function_name. All magic
     functions should accept a string, which they can parse for their own
     needs. This can make some functions easier to type, eg `%cd ../`
     vs. `%cd("../")`
 
     ALL definitions MUST begin with the prefix magic_. The user won't need it
     at the command line, but it is is needed in the definition. """
 
     # class globals
     auto_status = ['Automagic is OFF, % prefix IS needed for magic functions.',
                    'Automagic is ON, % prefix NOT needed for magic functions.']
 
     #......................................................................
     # some utility functions
 
     def __init__(self,shell):
         
         self.options_table = {}
         if profile is None:
             self.magic_prun = self.profile_missing_notice
         self.shell = shell
 
         # namespace for holding state we may need
         self._magic_state = Bunch()
 
     def profile_missing_notice(self, *args, **kwargs):
         error("""\
 The profile module could not be found.  If you are a Debian user,
 it has been removed from the standard Debian package because of its non-free
 license. To use profiling, please install"python2.3-profiler" from non-free.""")
 
     def default_option(self,fn,optstr):
         """Make an entry in the options_table for fn, with value optstr"""
 
         if fn not in self.lsmagic():
             error("%s is not a magic function" % fn)
         self.options_table[fn] = optstr
 
     def lsmagic(self):
         """Return a list of currently available magic functions.
 
         Gives a list of the bare names after mangling (['ls','cd', ...], not
         ['magic_ls','magic_cd',...]"""
 
         # FIXME. This needs a cleanup, in the way the magics list is built.
         
         # magics in class definition
         class_magic = lambda fn: fn.startswith('magic_') and \
                       callable(Magic.__dict__[fn])
         # in instance namespace (run-time user additions)
         inst_magic =  lambda fn: fn.startswith('magic_') and \
                      callable(self.__dict__[fn])
         # and bound magics by user (so they can access self):
         inst_bound_magic =  lambda fn: fn.startswith('magic_') and \
                            callable(self.__class__.__dict__[fn])
         magics = filter(class_magic,Magic.__dict__.keys()) + \
                  filter(inst_magic,self.__dict__.keys()) + \
                  filter(inst_bound_magic,self.__class__.__dict__.keys())
         out = []
         for fn in magics:
             out.append(fn.replace('magic_','',1))
         out.sort()
         return out
     
     def extract_input_slices(self,slices,raw=False):
         """Return as a string a set of input history slices.
 
         Inputs:
 
           - slices: the set of slices is given as a list of strings (like
           ['1','4:8','9'], since this function is for use by magic functions
           which get their arguments as strings.
 
         Optional inputs:
 
           - raw(False): by default, the processed input is used.  If this is
           true, the raw input history is used instead.
 
         Note that slices can be called with two notations:
 
         N:M -> standard python form, means including items N...(M-1).
 
         N-M -> include items N..M (closed endpoint)."""
 
         if raw:
             hist = self.shell.input_hist_raw
         else:
             hist = self.shell.input_hist
 
         cmds = []
         for chunk in slices:
             if ':' in chunk:
                 ini,fin = map(int,chunk.split(':'))
             elif '-' in chunk:
                 ini,fin = map(int,chunk.split('-'))
                 fin += 1
             else:
                 ini = int(chunk)
                 fin = ini+1
             cmds.append(hist[ini:fin])
         return cmds
         
     def _ofind(self,oname):
         """Find an object in the available namespaces.
 
         self._ofind(oname) -> dict with keys: found,obj,ospace,ismagic
 
         Has special code to detect magic functions.
         """
         
         oname = oname.strip()
 
         # Namespaces to search in:
         user_ns        = self.shell.user_ns
         internal_ns    = self.shell.internal_ns
         builtin_ns     = __builtin__.__dict__
         alias_ns       = self.shell.alias_table
 
         # Put them in a list. The order is important so that we find things in
         # the same order that Python finds them.
         namespaces = [ ('Interactive',user_ns),
                        ('IPython internal',internal_ns),
                        ('Python builtin',builtin_ns),
                        ('Alias',alias_ns),
                        ]
 
         # initialize results to 'null'
         found = 0; obj = None;  ospace = None;  ds = None;
         ismagic = 0; isalias = 0
 
         # Look for the given name by splitting it in parts.  If the head is
         # found, then we look for all the remaining parts as members, and only
         # declare success if we can find them all.
         oname_parts = oname.split('.')
         oname_head, oname_rest = oname_parts[0],oname_parts[1:]
         for nsname,ns in namespaces:
             try:
                 obj = ns[oname_head]
             except KeyError:
                 continue
             else:
                 for part in oname_rest:
                     try:
                         obj = getattr(obj,part)
                     except:
                         # Blanket except b/c some badly implemented objects
                         # allow __getattr__ to raise exceptions other than
                         # AttributeError, which then crashes IPython.
                         break
                 else:
                     # If we finish the for loop (no break), we got all members
                     found = 1
                     ospace = nsname
                     if ns == alias_ns:
                         isalias = 1
                     break  # namespace loop
 
         # Try to see if it's magic
         if not found:
             if oname.startswith(self.shell.ESC_MAGIC):
                 oname = oname[1:]
             obj = getattr(self,'magic_'+oname,None)
             if obj is not None:
                 found = 1
                 ospace = 'IPython internal'
                 ismagic = 1
 
         # Last try: special-case some literals like '', [], {}, etc:
         if not found and oname_head in ["''",'""','[]','{}','()']:
             obj = eval(oname_head)
             found = 1
             ospace = 'Interactive'
             
         return {'found':found, 'obj':obj, 'namespace':ospace,
                 'ismagic':ismagic, 'isalias':isalias}
     
     def arg_err(self,func):
         """Print docstring if incorrect arguments were passed"""
         print 'Error in arguments:'
         print OInspect.getdoc(func)
 
     def format_latex(self,strng):
         """Format a string for latex inclusion."""
 
         # Characters that need to be escaped for latex:
         escape_re = re.compile(r'(%|_|\$|#|&)',re.MULTILINE)
         # Magic command names as headers:
         cmd_name_re = re.compile(r'^(%s.*?):' % self.shell.ESC_MAGIC,
                                  re.MULTILINE)
         # Magic commands 
         cmd_re = re.compile(r'(?P<cmd>%s.+?\b)(?!\}\}:)' % self.shell.ESC_MAGIC,
                             re.MULTILINE)
         # Paragraph continue
         par_re = re.compile(r'\\$',re.MULTILINE)
 
         # The "\n" symbol
         newline_re = re.compile(r'\\n')
 
         # Now build the string for output:
         #strng = cmd_name_re.sub(r'\n\\texttt{\\textsl{\\large \1}}:',strng)
         strng = cmd_name_re.sub(r'\n\\bigskip\n\\texttt{\\textbf{ \1}}:',
                                 strng)
         strng = cmd_re.sub(r'\\texttt{\g<cmd>}',strng)
         strng = par_re.sub(r'\\\\',strng)
         strng = escape_re.sub(r'\\\1',strng)
         strng = newline_re.sub(r'\\textbackslash{}n',strng)
         return strng
 
     def format_screen(self,strng):
         """Format a string for screen printing.
 
         This removes some latex-type format codes."""
         # Paragraph continue
         par_re = re.compile(r'\\$',re.MULTILINE)
         strng = par_re.sub('',strng)
         return strng
 
     def parse_options(self,arg_str,opt_str,*long_opts,**kw):
         """Parse options passed to an argument string.
 
         The interface is similar to that of getopt(), but it returns back a
         Struct with the options as keys and the stripped argument string still
         as a string.
 
         arg_str is quoted as a true sys.argv vector by using shlex.split.
         This allows us to easily expand variables, glob files, quote
         arguments, etc.
 
         Options:
           -mode: default 'string'. If given as 'list', the argument string is
           returned as a list (split on whitespace) instead of a string.
 
           -list_all: put all option values in lists. Normally only options
           appearing more than once are put in a list."""
 
         # inject default options at the beginning of the input line
         caller = sys._getframe(1).f_code.co_name.replace('magic_','')
         arg_str = '%s %s' % (self.options_table.get(caller,''),arg_str)
         
         mode = kw.get('mode','string')
         if mode not in ['string','list']:
             raise ValueError,'incorrect mode given: %s' % mode
         # Get options
         list_all = kw.get('list_all',0)
 
         # Check if we have more than one argument to warrant extra processing:
         odict = {}  # Dictionary with options
         args = arg_str.split()
         if len(args) >= 1:
             # If the list of inputs only has 0 or 1 thing in it, there's no
             # need to look for options
-            argv = shlex_split(arg_str)
+            argv = shlex.split(arg_str)
             # Do regular option processing
             try:
                 opts,args = getopt(argv,opt_str,*long_opts)
             except GetoptError,e:
                 raise GetoptError('%s ( allowed: "%s" %s)' % (e.msg,opt_str, 
                                         " ".join(long_opts)))
             for o,a in opts:
                 if o.startswith('--'):
                     o = o[2:]
                 else:
                     o = o[1:]
                 try:
                     odict[o].append(a)
                 except AttributeError:
                     odict[o] = [odict[o],a]
                 except KeyError:
                     if list_all:
                         odict[o] = [a]
                     else:
                         odict[o] = a
 
         # Prepare opts,args for return
         opts = Struct(odict)
         if mode == 'string':
             args = ' '.join(args)
 
         return opts,args
     
     #......................................................................
     # And now the actual magic functions
 
     # Functions for IPython shell work (vars,funcs, config, etc)
     def magic_lsmagic(self, parameter_s = ''):
         """List currently available magic functions."""
         mesc = self.shell.ESC_MAGIC
         print 'Available magic functions:\n'+mesc+\
               ('  '+mesc).join(self.lsmagic())
         print '\n' + Magic.auto_status[self.shell.rc.automagic]
         return None
         
     def magic_magic(self, parameter_s = ''):
         """Print information about the magic function system."""
 
         mode = ''
         try:
             if parameter_s.split()[0] == '-latex':
                 mode = 'latex'
             if parameter_s.split()[0] == '-brief':
                 mode = 'brief'
         except:
             pass
 
         magic_docs = []
         for fname in self.lsmagic():
             mname = 'magic_' + fname
             for space in (Magic,self,self.__class__):
                 try:
                     fn = space.__dict__[mname]
                 except KeyError:
                     pass
                 else:
                     break
             if mode == 'brief':
                 # only first line
                 fndoc = fn.__doc__.split('\n',1)[0]
             else:
                 fndoc = fn.__doc__
                 
             magic_docs.append('%s%s:\n\t%s\n' %(self.shell.ESC_MAGIC,
                                                 fname,fndoc))
         magic_docs = ''.join(magic_docs)
 
         if mode == 'latex':
             print self.format_latex(magic_docs)
             return
         else:
             magic_docs = self.format_screen(magic_docs)
         if mode == 'brief':
             return magic_docs
         
         outmsg = """
 IPython's 'magic' functions
 ===========================
 
 The magic function system provides a series of functions which allow you to
 control the behavior of IPython itself, plus a lot of system-type
 features. All these functions are prefixed with a % character, but parameters
 are given without parentheses or quotes.
 
 NOTE: If you have 'automagic' enabled (via the command line option or with the
 %automagic function), you don't need to type in the % explicitly.  By default,
 IPython ships with automagic on, so you should only rarely need the % escape.
 
 Example: typing '%cd mydir' (without the quotes) changes you working directory
 to 'mydir', if it exists.
 
 You can define your own magic functions to extend the system. See the supplied
 ipythonrc and example-magic.py files for details (in your ipython
 configuration directory, typically $HOME/.ipython/).
 
 You can also define your own aliased names for magic functions. In your
 ipythonrc file, placing a line like:
 
   execute __IPYTHON__.magic_pf = __IPYTHON__.magic_profile
 
 will define %pf as a new name for %profile.
 
 You can also call magics in code using the ipmagic() function, which IPython
 automatically adds to the builtin namespace.  Type 'ipmagic?' for details.
 
 For a list of the available magic functions, use %lsmagic. For a description
 of any of them, type %magic_name?, e.g. '%cd?'.
 
 Currently the magic system has the following functions:\n"""
 
         mesc = self.shell.ESC_MAGIC
         outmsg = ("%s\n%s\n\nSummary of magic functions (from %slsmagic):"
                   "\n\n%s%s\n\n%s" % (outmsg,
                                      magic_docs,mesc,mesc,
                                      ('  '+mesc).join(self.lsmagic()),
                                      Magic.auto_status[self.shell.rc.automagic] ) )
 
         page(outmsg,screen_lines=self.shell.rc.screen_length)
   
     def magic_automagic(self, parameter_s = ''):
         """Make magic functions callable without having to type the initial %.
         
         Toggles on/off (when off, you must call it as %automagic, of
         course). Note that magic functions have lowest priority, so if there's
         a variable whose name collides with that of a magic fn, automagic
         won't work for that function (you get the variable instead). However,
         if you delete the variable (del var), the previously shadowed magic
         function becomes visible to automagic again."""
 
         rc = self.shell.rc
         rc.automagic = not rc.automagic
         print '\n' + Magic.auto_status[rc.automagic]
 
     def magic_autocall(self, parameter_s = ''):
         """Make functions callable without having to type parentheses.
 
         Usage:
 
            %autocall [mode]
 
         The mode can be one of: 0->Off, 1->Smart, 2->Full.  If not given, the
         value is toggled on and off (remembering the previous state)."""
         
         rc = self.shell.rc
 
         if parameter_s:
             arg = int(parameter_s)
         else:
             arg = 'toggle'
 
         if not arg in (0,1,2,'toggle'):
             error('Valid modes: (0->Off, 1->Smart, 2->Full')
             return
 
         if arg in (0,1,2):
             rc.autocall = arg
         else: # toggle
             if rc.autocall:
                 self._magic_state.autocall_save = rc.autocall
                 rc.autocall = 0
             else:
                 try:
                     rc.autocall = self._magic_state.autocall_save
                 except AttributeError:
                     rc.autocall = self._magic_state.autocall_save = 1
                 
         print "Automatic calling is:",['OFF','Smart','Full'][rc.autocall]
 
     def magic_autoindent(self, parameter_s = ''):
         """Toggle autoindent on/off (if available)."""
 
         self.shell.set_autoindent()
         print "Automatic indentation is:",['OFF','ON'][self.shell.autoindent]
 
     def magic_system_verbose(self, parameter_s = ''):
         """Toggle verbose printing of system calls on/off."""
 
         self.shell.rc_set_toggle('system_verbose')
         print "System verbose printing is:",\
               ['OFF','ON'][self.shell.rc.system_verbose]
 
     def magic_history(self, parameter_s = ''):
         """Print input history (_i<n> variables), with most recent last.
         
         %history        -> print at most 40 inputs (some may be multi-line)\\
         %history n     -> print at most n inputs\\
         %history n1 n2 -> print inputs between n1 and n2 (n2 not included)\\
         
         Each input's number <n> is shown, and is accessible as the
         automatically generated variable _i<n>.  Multi-line statements are
         printed starting at a new line for easy copy/paste.
         
 
         Options:
 
           -n: do NOT print line numbers.  This is useful if you want to get a
           printout of many lines which can be directly pasted into a text
           editor.
 
           This feature is only available if numbered prompts are in use.
 
           -r: print the 'raw' history.  IPython filters your input and
           converts it all into valid Python source before executing it (things
           like magics or aliases are turned into function calls, for
           example).  With this option, you'll see the unfiltered history
           instead of the filtered version: '%cd /' will be seen as '%cd /'
           instead of '_ip.magic("%cd /")'.
         """
 
         shell = self.shell
         if not shell.outputcache.do_full_cache:
             print 'This feature is only available if numbered prompts are in use.'
             return
         opts,args = self.parse_options(parameter_s,'nr',mode='list')
 
         if opts.has_key('r'):
             input_hist = shell.input_hist_raw
         else:
             input_hist = shell.input_hist
         
         default_length = 40
         if len(args) == 0:
             final = len(input_hist)
             init = max(1,final-default_length)
         elif len(args) == 1:
             final = len(input_hist)
             init = max(1,final-int(args[0]))
         elif len(args) == 2:
             init,final = map(int,args)
         else:
             warn('%hist takes 0, 1 or 2 arguments separated by spaces.')
             print self.magic_hist.__doc__
             return
         width = len(str(final))
         line_sep = ['','\n']
         print_nums = not opts.has_key('n')
         for in_num in range(init,final):
             inline = input_hist[in_num]
             multiline = int(inline.count('\n') > 1)
             if print_nums:
                 print '%s:%s' % (str(in_num).ljust(width),line_sep[multiline]),
             print inline,
 
     def magic_hist(self, parameter_s=''):
         """Alternate name for %history."""
         return self.magic_history(parameter_s)
 
     def magic_p(self, parameter_s=''):
         """Just a short alias for Python's 'print'."""
         exec 'print ' + parameter_s in self.shell.user_ns
 
     def magic_r(self, parameter_s=''):
         """Repeat previous input.
 
         If given an argument, repeats the previous command which starts with
         the same string, otherwise it just repeats the previous input.
 
         Shell escaped commands (with ! as first character) are not recognized
         by this system, only pure python code and magic commands.
         """
 
         start = parameter_s.strip()
         esc_magic = self.shell.ESC_MAGIC
         # Identify magic commands even if automagic is on (which means
         # the in-memory version is different from that typed by the user).
         if self.shell.rc.automagic:
             start_magic = esc_magic+start
         else:
             start_magic = start
         # Look through the input history in reverse
         for n in range(len(self.shell.input_hist)-2,0,-1):
             input = self.shell.input_hist[n]
             # skip plain 'r' lines so we don't recurse to infinity
             if input != '_ip.magic("r")\n' and \
                    (input.startswith(start) or input.startswith(start_magic)):
                 #print 'match',`input`  # dbg
                 print 'Executing:',input,
                 self.shell.runlines(input)
                 return
         print 'No previous input matching `%s` found.' % start
 
     def magic_page(self, parameter_s=''):
         """Pretty print the object and display it through a pager.
         
         If no parameter is given, use _ (last output)."""
         # After a function contributed by Olivier Aubert, slightly modified.
 
         oname = parameter_s and parameter_s or '_' 
         info = self._ofind(oname)
         if info['found']:
             page(pformat(info['obj']))
         else:
             print 'Object `%s` not found' % oname
 
     def magic_profile(self, parameter_s=''):
         """Print your currently active IPyhton profile."""
         if self.shell.rc.profile:
             printpl('Current IPython profile: $self.shell.rc.profile.')
         else:
             print 'No profile active.'
         
     def _inspect(self,meth,oname,**kw):
         """Generic interface to the inspector system.
 
         This function is meant to be called by pdef, pdoc & friends."""
         
         oname = oname.strip()
         info = Struct(self._ofind(oname))
         if info.found:
             pmethod = getattr(self.shell.inspector,meth)
             formatter = info.ismagic and self.format_screen or None
             if meth == 'pdoc':
                 pmethod(info.obj,oname,formatter)
             elif meth == 'pinfo':
                 pmethod(info.obj,oname,formatter,info,**kw)
             else:
                 pmethod(info.obj,oname)
         else:
             print 'Object `%s` not found.' % oname
             return 'not found'  # so callers can take other action
         
     def magic_pdef(self, parameter_s=''):
         """Print the definition header for any callable object.
 
         If the object is a class, print the constructor information."""
         self._inspect('pdef',parameter_s)
         
     def magic_pdoc(self, parameter_s=''):
         """Print the docstring for an object.
 
         If the given object is a class, it will print both the class and the
         constructor docstrings."""
         self._inspect('pdoc',parameter_s)
 
     def magic_psource(self, parameter_s=''):
         """Print (or run through pager) the source code for an object."""
         self._inspect('psource',parameter_s)
 
     def magic_pfile(self, parameter_s=''):
         """Print (or run through pager) the file where an object is defined.
 
         The file opens at the line where the object definition begins. IPython
         will honor the environment variable PAGER if set, and otherwise will
         do its best to print the file in a convenient form.
 
         If the given argument is not an object currently defined, IPython will
         try to interpret it as a filename (automatically adding a .py extension
         if needed). You can thus use %pfile as a syntax highlighting code
         viewer."""
 
         # first interpret argument as an object name
         out = self._inspect('pfile',parameter_s)
         # if not, try the input as a filename
         if out == 'not found':
             try:
                 filename = get_py_filename(parameter_s)
             except IOError,msg:
                 print msg
                 return
             page(self.shell.inspector.format(file(filename).read()))
             
     def magic_pinfo(self, parameter_s=''):
         """Provide detailed information about an object.
 
         '%pinfo object' is just a synonym for object? or ?object."""
 
         #print 'pinfo par: <%s>' % parameter_s  # dbg
 
         # detail_level: 0 -> obj? , 1 -> obj??
         detail_level = 0
         # We need to detect if we got called as 'pinfo pinfo foo', which can
         # happen if the user types 'pinfo foo?' at the cmd line.
         pinfo,qmark1,oname,qmark2 = \
                re.match('(pinfo )?(\?*)(.*?)(\??$)',parameter_s).groups()
         if pinfo or qmark1 or qmark2:
             detail_level = 1
         if "*" in oname:
             self.magic_psearch(oname)
         else:
             self._inspect('pinfo',oname,detail_level=detail_level)
 
     def magic_psearch(self, parameter_s=''):
         """Search for object in namespaces by wildcard.
 
         %psearch [options] PATTERN [OBJECT TYPE]
 
         Note: ? can be used as a synonym for %psearch, at the beginning or at
         the end: both a*? and ?a* are equivalent to '%psearch a*'.  Still, the
         rest of the command line must be unchanged (options come first), so
         for example the following forms are equivalent
 
         %psearch -i a* function
         -i a* function?
         ?-i a* function
 
         Arguments:
         
           PATTERN
 
           where PATTERN is a string containing * as a wildcard similar to its
           use in a shell.  The pattern is matched in all namespaces on the
           search path. By default objects starting with a single _ are not
           matched, many IPython generated objects have a single
           underscore. The default is case insensitive matching. Matching is
           also done on the attributes of objects and not only on the objects
           in a module.
 
           [OBJECT TYPE]
 
           Is the name of a python type from the types module. The name is
           given in lowercase without the ending type, ex. StringType is
           written string. By adding a type here only objects matching the
           given type are matched. Using all here makes the pattern match all
           types (this is the default).
 
         Options:
 
           -a: makes the pattern match even objects whose names start with a
           single underscore.  These names are normally ommitted from the
           search.
 
           -i/-c: make the pattern case insensitive/sensitive.  If neither of
           these options is given, the default is read from your ipythonrc
           file.  The option name which sets this value is
           'wildcards_case_sensitive'.  If this option is not specified in your
           ipythonrc file, IPython's internal default is to do a case sensitive
           search.
 
           -e/-s NAMESPACE: exclude/search a given namespace.  The pattern you
           specifiy can be searched in any of the following namespaces:
           'builtin', 'user', 'user_global','internal', 'alias', where
           'builtin' and 'user' are the search defaults.  Note that you should
           not use quotes when specifying namespaces.
 
           'Builtin' contains the python module builtin, 'user' contains all
           user data, 'alias' only contain the shell aliases and no python
           objects, 'internal' contains objects used by IPython.  The
           'user_global' namespace is only used by embedded IPython instances,
           and it contains module-level globals.  You can add namespaces to the
           search with -s or exclude them with -e (these options can be given
           more than once).
     
         Examples:
        
         %psearch a*            -> objects beginning with an a
         %psearch -e builtin a* -> objects NOT in the builtin space starting in a
         %psearch a* function   -> all functions beginning with an a
         %psearch re.e*         -> objects beginning with an e in module re
         %psearch r*.e*         -> objects that start with e in modules starting in r
         %psearch r*.* string   -> all strings in modules beginning with r
 
         Case sensitve search:
        
         %psearch -c a*         list all object beginning with lower case a
 
         Show objects beginning with a single _:
        
         %psearch -a _*         list objects beginning with a single underscore"""
 
         # default namespaces to be searched
         def_search = ['user','builtin']
 
         # Process options/args
         opts,args = self.parse_options(parameter_s,'cias:e:',list_all=True)
         opt = opts.get
         shell = self.shell
         psearch = shell.inspector.psearch
         
         # select case options
         if opts.has_key('i'):
             ignore_case = True
         elif opts.has_key('c'):
             ignore_case = False
         else:
             ignore_case = not shell.rc.wildcards_case_sensitive
 
         # Build list of namespaces to search from user options
         def_search.extend(opt('s',[]))
         ns_exclude = ns_exclude=opt('e',[])
         ns_search = [nm for nm in def_search if nm not in ns_exclude]
         
         # Call the actual search
         try:
             psearch(args,shell.ns_table,ns_search,
                     show_all=opt('a'),ignore_case=ignore_case)
         except:
             shell.showtraceback()
 
     def magic_who_ls(self, parameter_s=''):
         """Return a sorted list of all interactive variables.
 
         If arguments are given, only variables of types matching these
         arguments are returned."""
 
         user_ns = self.shell.user_ns
         internal_ns = self.shell.internal_ns
         user_config_ns = self.shell.user_config_ns
         out = []
         typelist = parameter_s.split()
 
         for i in user_ns:
             if not (i.startswith('_') or i.startswith('_i')) \
                    and not (i in internal_ns or i in user_config_ns):
                 if typelist:
                     if type(user_ns[i]).__name__ in typelist:
                         out.append(i)
                 else:
                     out.append(i)
         out.sort()
         return out
         
     def magic_who(self, parameter_s=''):
         """Print all interactive variables, with some minimal formatting.
 
         If any arguments are given, only variables whose type matches one of
         these are printed.  For example:
 
           %who function str
 
         will only list functions and strings, excluding all other types of
         variables.  To find the proper type names, simply use type(var) at a
         command line to see how python prints type names.  For example:
 
           In [1]: type('hello')\\
           Out[1]: <type 'str'>
 
         indicates that the type name for strings is 'str'.
 
         %who always excludes executed names loaded through your configuration
         file and things which are internal to IPython.
 
         This is deliberate, as typically you may load many modules and the
         purpose of %who is to show you only what you've manually defined."""
 
         varlist = self.magic_who_ls(parameter_s)
         if not varlist:
             print 'Interactive namespace is empty.'
             return
 
         # if we have variables, move on...
 
         # stupid flushing problem: when prompts have no separators, stdout is
         # getting lost. I'm starting to think this is a python bug. I'm having
         # to force a flush with a print because even a sys.stdout.flush
         # doesn't seem to do anything!
 
         count = 0
         for i in varlist:
             print i+'\t',
             count += 1
             if count > 8:
                 count = 0
                 print
             sys.stdout.flush()  # FIXME. Why the hell isn't this flushing???
             
         print # well, this does force a flush at the expense of an extra \n
 
     def magic_whos(self, parameter_s=''):
         """Like %who, but gives some extra information about each variable.
 
         The same type filtering of %who can be applied here.
 
         For all variables, the type is printed. Additionally it prints:
         
           - For {},[],(): their length.
 
           - For Numeric arrays, a summary with shape, number of elements,
           typecode and size in memory.
 
           - Everything else: a string representation, snipping their middle if
           too long."""
         
         varnames = self.magic_who_ls(parameter_s)
         if not varnames:
             print 'Interactive namespace is empty.'
             return
 
         # if we have variables, move on...
 
         # for these types, show len() instead of data:
         seq_types = [types.DictType,types.ListType,types.TupleType]
 
         # for Numeric arrays, display summary info
         try:
             import Numeric
         except ImportError:
             array_type = None
         else:
             array_type = Numeric.ArrayType.__name__
         
         # Find all variable names and types so we can figure out column sizes
         get_vars = lambda i: self.shell.user_ns[i]
         type_name = lambda v: type(v).__name__
         varlist = map(get_vars,varnames)
 
         typelist = []
         for vv in varlist:
             tt = type_name(vv)
             if tt=='instance':
                 typelist.append(str(vv.__class__))
             else:
                 typelist.append(tt)
 
         # column labels and # of spaces as separator
         varlabel = 'Variable'
         typelabel = 'Type'
         datalabel = 'Data/Info'
         colsep = 3
         # variable format strings
         vformat    = "$vname.ljust(varwidth)$vtype.ljust(typewidth)"
         vfmt_short = '$vstr[:25]<...>$vstr[-25:]'
         aformat    = "%s: %s elems, type `%s`, %s bytes"
         # find the size of the columns to format the output nicely
         varwidth = max(max(map(len,varnames)), len(varlabel)) + colsep
         typewidth = max(max(map(len,typelist)), len(typelabel)) + colsep
         # table header
         print varlabel.ljust(varwidth) + typelabel.ljust(typewidth) + \
               ' '+datalabel+'\n' + '-'*(varwidth+typewidth+len(datalabel)+1)
         # and the table itself
         kb = 1024
         Mb = 1048576  # kb**2
         for vname,var,vtype in zip(varnames,varlist,typelist):
             print itpl(vformat),
             if vtype in seq_types:
                 print len(var)
             elif vtype==array_type:
                 vshape = str(var.shape).replace(',','').replace(' ','x')[1:-1]
                 vsize  = Numeric.size(var)
                 vbytes = vsize*var.itemsize()
                 if vbytes < 100000:
                     print aformat % (vshape,vsize,var.typecode(),vbytes)
                 else:
                     print aformat % (vshape,vsize,var.typecode(),vbytes),
                     if vbytes < Mb:
                         print '(%s kb)' % (vbytes/kb,)
                     else:
                         print '(%s Mb)' % (vbytes/Mb,)
             else:
                 vstr = str(var).replace('\n','\\n')
                 if len(vstr) < 50:
                     print vstr
                 else:
                     printpl(vfmt_short)
                 
     def magic_reset(self, parameter_s=''):
         """Resets the namespace by removing all names defined by the user.
 
         Input/Output history are left around in case you need them."""
 
         ans = raw_input(
           "Once deleted, variables cannot be recovered. Proceed (y/n)? ")
         if not ans.lower() == 'y':
             print 'Nothing done.'
             return
         user_ns = self.shell.user_ns
         for i in self.magic_who_ls():
             del(user_ns[i])
 
     def magic_config(self,parameter_s=''):
         """Show IPython's internal configuration."""
         
         page('Current configuration structure:\n'+
              pformat(self.shell.rc.dict()))
 
     def magic_logstart(self,parameter_s=''):
         """Start logging anywhere in a session.
 
         %logstart [-o|-t] [log_name [log_mode]]
 
         If no name is given, it defaults to a file named 'ipython_log.py' in your
         current directory, in 'rotate' mode (see below).
 
         '%logstart name' saves to file 'name' in 'backup' mode.  It saves your
         history up to that point and then continues logging.
 
         %logstart takes a second optional parameter: logging mode. This can be one
         of (note that the modes are given unquoted):\\
           append: well, that says it.\\
           backup: rename (if exists) to name~ and start name.\\
           global: single logfile in your home dir, appended to.\\
           over  : overwrite existing log.\\
           rotate: create rotating logs name.1~, name.2~, etc.
 
         Options:
 
           -o: log also IPython's output.  In this mode, all commands which
           generate an Out[NN] prompt are recorded to the logfile, right after
           their corresponding input line.  The output lines are always
           prepended with a '#[Out]# ' marker, so that the log remains valid
           Python code.
 
           Since this marker is always the same, filtering only the output from
           a log is very easy, using for example a simple awk call:
 
             awk -F'#\\[Out\\]# ' '{if($2) {print $2}}' ipython_log.py
 
           -t: put timestamps before each input line logged (these are put in
           comments)."""
         
         opts,par = self.parse_options(parameter_s,'ot')
         log_output = 'o' in opts
         timestamp = 't' in opts
 
         rc = self.shell.rc
         logger = self.shell.logger
 
         # if no args are given, the defaults set in the logger constructor by
         # ipytohn remain valid
         if par:
             try:
                 logfname,logmode = par.split()
             except:
                 logfname = par
                 logmode = 'backup'
         else:
             logfname = logger.logfname
             logmode = logger.logmode
         # put logfname into rc struct as if it had been called on the command
         # line, so it ends up saved in the log header Save it in case we need
         # to restore it...
         old_logfile = rc.opts.get('logfile','')  
         if logfname:
             logfname = os.path.expanduser(logfname)
         rc.opts.logfile = logfname
         loghead = self.shell.loghead_tpl % (rc.opts,rc.args)
         try:
             started  = logger.logstart(logfname,loghead,logmode,
                                        log_output,timestamp)
         except:
             rc.opts.logfile = old_logfile
             warn("Couldn't start log: %s" % sys.exc_info()[1])
         else:
             # log input history up to this point, optionally interleaving
             # output if requested
 
             if timestamp:
                 # disable timestamping for the previous history, since we've
                 # lost those already (no time machine here).
                 logger.timestamp = False
             if log_output:
                 log_write = logger.log_write
                 input_hist = self.shell.input_hist
                 output_hist = self.shell.output_hist
                 for n in range(1,len(input_hist)-1):
                     log_write(input_hist[n].rstrip())
                     if n in output_hist:
                         log_write(repr(output_hist[n]),'output')
             else:
                 logger.log_write(self.shell.input_hist[1:])
             if timestamp:
                 # re-enable timestamping
                 logger.timestamp = True
                 
             print ('Activating auto-logging. '
                    'Current session state plus future input saved.')
             logger.logstate()
 
     def magic_logoff(self,parameter_s=''):
         """Temporarily stop logging.
 
         You must have previously started logging."""
         self.shell.logger.switch_log(0)
         
     def magic_logon(self,parameter_s=''):
         """Restart logging.
 
         This function is for restarting logging which you've temporarily
         stopped with %logoff. For starting logging for the first time, you
         must use the %logstart function, which allows you to specify an
         optional log filename."""
         
         self.shell.logger.switch_log(1)
     
     def magic_logstate(self,parameter_s=''):
         """Print the status of the logging system."""
 
         self.shell.logger.logstate()
         
     def magic_pdb(self, parameter_s=''):
         """Control the calling of the pdb interactive debugger.
 
         Call as '%pdb on', '%pdb 1', '%pdb off' or '%pdb 0'. If called without
         argument it works as a toggle.
 
         When an exception is triggered, IPython can optionally call the
         interactive pdb debugger after the traceback printout. %pdb toggles
         this feature on and off."""
 
         par = parameter_s.strip().lower()
 
         if par:
             try:
                 new_pdb = {'off':0,'0':0,'on':1,'1':1}[par]
             except KeyError:
                 print ('Incorrect argument. Use on/1, off/0, '
                        'or nothing for a toggle.')
                 return
         else:
             # toggle
             new_pdb = not self.shell.InteractiveTB.call_pdb
 
         # set on the shell
         self.shell.call_pdb = new_pdb
         print 'Automatic pdb calling has been turned',on_off(new_pdb)
 
     def magic_prun(self, parameter_s ='',user_mode=1,
                    opts=None,arg_lst=None,prog_ns=None):
 
         """Run a statement through the python code profiler.
 
         Usage:\\
           %prun [options] statement
 
         The given statement (which doesn't require quote marks) is run via the
         python profiler in a manner similar to the profile.run() function.
         Namespaces are internally managed to work correctly; profile.run
         cannot be used in IPython because it makes certain assumptions about
         namespaces which do not hold under IPython.
 
         Options:
 
         -l <limit>: you can place restrictions on what or how much of the
         profile gets printed. The limit value can be:
 
           * A string: only information for function names containing this string
           is printed.
 
           * An integer: only these many lines are printed.
 
           * A float (between 0 and 1): this fraction of the report is printed
           (for example, use a limit of 0.4 to see the topmost 40% only).
 
         You can combine several limits with repeated use of the option. For
         example, '-l __init__ -l 5' will print only the topmost 5 lines of
         information about class constructors.
 
         -r: return the pstats.Stats object generated by the profiling. This
         object has all the information about the profile in it, and you can
         later use it for further analysis or in other functions.
 
         Since magic functions have a particular form of calling which prevents
         you from writing something like:\\
           In [1]: p = %prun -r print 4  # invalid!\\
         you must instead use IPython's automatic variables to assign this:\\
           In [1]: %prun -r print 4  \\
           Out[1]: <pstats.Stats instance at 0x8222cec>\\
           In [2]: stats = _
 
         If you really need to assign this value via an explicit function call,
         you can always tap directly into the true name of the magic function
         by using the _ip.magic function:\\
           In [3]: stats = _ip.magic('prun','-r print 4')
 
         You can type _ip.magic? for more details.
 
        -s <key>: sort profile by given key. You can provide more than one key
         by using the option several times: '-s key1 -s key2 -s key3...'. The
         default sorting key is 'time'.
 
         The following is copied verbatim from the profile documentation
         referenced below:
 
         When more than one key is provided, additional keys are used as
         secondary criteria when the there is equality in all keys selected
         before them.
         
         Abbreviations can be used for any key names, as long as the
         abbreviation is unambiguous.  The following are the keys currently
         defined:
 
                 Valid Arg       Meaning\\
                   "calls"      call count\\
                   "cumulative" cumulative time\\
                   "file"       file name\\
                   "module"     file name\\
                   "pcalls"     primitive call count\\
                   "line"       line number\\
                   "name"       function name\\
                   "nfl"        name/file/line\\
                   "stdname"    standard name\\
                   "time"       internal time
 
         Note that all sorts on statistics are in descending order (placing
         most time consuming items first), where as name, file, and line number
         searches are in ascending order (i.e., alphabetical). The subtle
         distinction between "nfl" and "stdname" is that the standard name is a
         sort of the name as printed, which means that the embedded line
         numbers get compared in an odd way.  For example, lines 3, 20, and 40
         would (if the file names were the same) appear in the string order
         "20" "3" and "40".  In contrast, "nfl" does a numeric compare of the
         line numbers.  In fact, sort_stats("nfl") is the same as
         sort_stats("name", "file", "line").
 
         -T <filename>: save profile results as shown on screen to a text
         file. The profile is still shown on screen.
 
         -D <filename>: save (via dump_stats) profile statistics to given
         filename. This data is in a format understod by the pstats module, and
         is generated by a call to the dump_stats() method of profile
         objects. The profile is still shown on screen.
 
         If you want to run complete programs under the profiler's control, use
         '%run -p [prof_opts] filename.py [args to program]' where prof_opts
         contains profiler specific options as described here.
         
         You can read the complete documentation for the profile module with:\\
           In [1]: import profile; profile.help() """
 
         opts_def = Struct(D=[''],l=[],s=['time'],T=[''])
         # protect user quote marks
         parameter_s = parameter_s.replace('"',r'\"').replace("'",r"\'")
         
         if user_mode:  # regular user call
             opts,arg_str = self.parse_options(parameter_s,'D:l:rs:T:',
                                               list_all=1)
             namespace = self.shell.user_ns
         else:  # called to run a program by %run -p
             try:
                 filename = get_py_filename(arg_lst[0])
             except IOError,msg:
                 error(msg)
                 return
 
             arg_str = 'execfile(filename,prog_ns)'
             namespace = locals()
 
         opts.merge(opts_def)
         
         prof = profile.Profile()
         try:
             prof = prof.runctx(arg_str,namespace,namespace)
             sys_exit = ''
         except SystemExit:
             sys_exit = """*** SystemExit exception caught in code being profiled."""
 
         stats = pstats.Stats(prof).strip_dirs().sort_stats(*opts.s)
 
         lims = opts.l
         if lims:
             lims = []  # rebuild lims with ints/floats/strings
             for lim in opts.l:
                 try:
                     lims.append(int(lim))
                 except ValueError:
                     try:
                         lims.append(float(lim))
                     except ValueError:
                         lims.append(lim)
                     
         # trap output
         sys_stdout = sys.stdout
         stdout_trap = StringIO()
         try:
             sys.stdout = stdout_trap
             stats.print_stats(*lims)
         finally:
             sys.stdout = sys_stdout
         output = stdout_trap.getvalue()
         output = output.rstrip()
 
         page(output,screen_lines=self.shell.rc.screen_length)
         print sys_exit,
 
         dump_file = opts.D[0]
         text_file = opts.T[0]
         if dump_file:
             prof.dump_stats(dump_file)
             print '\n*** Profile stats marshalled to file',\
                   `dump_file`+'.',sys_exit
         if text_file:
             file(text_file,'w').write(output)
             print '\n*** Profile printout saved to text file',\
                   `text_file`+'.',sys_exit
 
         if opts.has_key('r'):
             return stats
         else:
             return None
 
     def magic_run(self, parameter_s ='',runner=None):
         """Run the named file inside IPython as a program.
 
         Usage:\\
           %run [-n -i -t [-N<N>] -d [-b<N>] -p [profile options]] file [args]
 
         Parameters after the filename are passed as command-line arguments to
         the program (put in sys.argv). Then, control returns to IPython's
         prompt.
 
         This is similar to running at a system prompt:\\
           $ python file args\\
         but with the advantage of giving you IPython's tracebacks, and of
         loading all variables into your interactive namespace for further use
         (unless -p is used, see below).
 
         The file is executed in a namespace initially consisting only of
         __name__=='__main__' and sys.argv constructed as indicated. It thus
         sees its environment as if it were being run as a stand-alone
         program. But after execution, the IPython interactive namespace gets
         updated with all variables defined in the program (except for __name__
         and sys.argv). This allows for very convenient loading of code for
         interactive work, while giving each program a 'clean sheet' to run in.
 
         Options:
         
         -n: __name__ is NOT set to '__main__', but to the running file's name
         without extension (as python does under import).  This allows running
         scripts and reloading the definitions in them without calling code
         protected by an ' if __name__ == "__main__" ' clause.
 
         -i: run the file in IPython's namespace instead of an empty one. This
         is useful if you are experimenting with code written in a text editor
         which depends on variables defined interactively.
 
         -e: ignore sys.exit() calls or SystemExit exceptions in the script
         being run.  This is particularly useful if IPython is being used to
         run unittests, which always exit with a sys.exit() call.  In such
         cases you are interested in the output of the test results, not in
         seeing a traceback of the unittest module.
 
         -t: print timing information at the end of the run.  IPython will give
         you an estimated CPU time consumption for your script, which under
         Unix uses the resource module to avoid the wraparound problems of
         time.clock().  Under Unix, an estimate of time spent on system tasks
         is also given (for Windows platforms this is reported as 0.0).
 
         If -t is given, an additional -N<N> option can be given, where <N>
         must be an integer indicating how many times you want the script to
         run.  The final timing report will include total and per run results.
 
         For example (testing the script uniq_stable.py):
 
             In [1]: run -t uniq_stable
 
             IPython CPU timings (estimated):\\
               User  :    0.19597 s.\\
               System:        0.0 s.\\
 
             In [2]: run -t -N5 uniq_stable
 
             IPython CPU timings (estimated):\\
             Total runs performed: 5\\
               Times :      Total       Per run\\
               User  :   0.910862 s,  0.1821724 s.\\
               System:        0.0 s,        0.0 s.
 
         -d: run your program under the control of pdb, the Python debugger.
         This allows you to execute your program step by step, watch variables,
         etc.  Internally, what IPython does is similar to calling:
         
           pdb.run('execfile("YOURFILENAME")')
 
         with a breakpoint set on line 1 of your file.  You can change the line
         number for this automatic breakpoint to be <N> by using the -bN option
         (where N must be an integer).  For example:
 
           %run -d -b40 myscript
 
         will set the first breakpoint at line 40 in myscript.py.  Note that
         the first breakpoint must be set on a line which actually does
         something (not a comment or docstring) for it to stop execution.
 
         When the pdb debugger starts, you will see a (Pdb) prompt.  You must
         first enter 'c' (without qoutes) to start execution up to the first
         breakpoint.
 
         Entering 'help' gives information about the use of the debugger.  You
         can easily see pdb's full documentation with "import pdb;pdb.help()"
         at a prompt.
 
         -p: run program under the control of the Python profiler module (which
         prints a detailed report of execution times, function calls, etc).
 
         You can pass other options after -p which affect the behavior of the
         profiler itself. See the docs for %prun for details.
 
         In this mode, the program's variables do NOT propagate back to the
         IPython interactive namespace (because they remain in the namespace
         where the profiler executes them).
 
         Internally this triggers a call to %prun, see its documentation for
         details on the options available specifically for profiling."""
 
         # get arguments and set sys.argv for program to be run.
         opts,arg_lst = self.parse_options(parameter_s,'nidtN:b:pD:l:rs:T:e',
                                           mode='list',list_all=1)
 
         try:
             filename = get_py_filename(arg_lst[0])
         except IndexError:
             warn('you must provide at least a filename.')
             print '\n%run:\n',OInspect.getdoc(self.magic_run)
             return
         except IOError,msg:
             error(msg)
             return
 
         # Control the response to exit() calls made by the script being run
         exit_ignore = opts.has_key('e')
         
         # Make sure that the running script gets a proper sys.argv as if it
         # were run from a system shell.
         save_argv = sys.argv # save it for later restoring
         sys.argv = [filename]+ arg_lst[1:]  # put in the proper filename
 
         if opts.has_key('i'):
             prog_ns = self.shell.user_ns
             __name__save = self.shell.user_ns['__name__']
             prog_ns['__name__'] = '__main__'
         else:
             if opts.has_key('n'):
                 name = os.path.splitext(os.path.basename(filename))[0]
             else:
                 name = '__main__'
             prog_ns = {'__name__':name}
 
         # Since '%run foo' emulates 'python foo.py' at the cmd line, we must
         # set the __file__ global in the script's namespace
         prog_ns['__file__'] = filename
         
         # pickle fix.  See iplib for an explanation.  But we need to make sure
         # that, if we overwrite __main__, we replace it at the end
         if prog_ns['__name__'] == '__main__':
             restore_main = sys.modules['__main__']
         else:
             restore_main = False
             
         sys.modules[prog_ns['__name__']] = FakeModule(prog_ns)
         
         stats = None
         try:
             if opts.has_key('p'):
                 stats = self.magic_prun('',0,opts,arg_lst,prog_ns)
             else:
                 if opts.has_key('d'):
                     deb = Debugger.Pdb(self.shell.rc.colors)
                     # reset Breakpoint state, which is moronically kept
                     # in a class
                     bdb.Breakpoint.next = 1
                     bdb.Breakpoint.bplist = {}
                     bdb.Breakpoint.bpbynumber = [None]
                     # Set an initial breakpoint to stop execution
                     maxtries = 10
                     bp = int(opts.get('b',[1])[0])
                     checkline = deb.checkline(filename,bp)
                     if not checkline:
                         for bp in range(bp+1,bp+maxtries+1):
                             if deb.checkline(filename,bp):
                                 break
                         else:
                             msg = ("\nI failed to find a valid line to set "
                                    "a breakpoint\n"
                                    "after trying up to line: %s.\n"
                                    "Please set a valid breakpoint manually "
                                    "with the -b option." % bp)
                             error(msg)
                             return
                     # if we find a good linenumber, set the breakpoint
                     deb.do_break('%s:%s' % (filename,bp))
                     # Start file run
                     print "NOTE: Enter 'c' at the",
                     print "ipdb> prompt to start your script."
                     try:
                         deb.run('execfile("%s")' % filename,prog_ns)
                     except:
                         etype, value, tb = sys.exc_info()
                         # Skip three frames in the traceback: the %run one,
                         # one inside bdb.py, and the command-line typed by the
                         # user (run by exec in pdb itself).
                         self.shell.InteractiveTB(etype,value,tb,tb_offset=3)
                 else:
                     if runner is None:
                         runner = self.shell.safe_execfile
                     if opts.has_key('t'):
                         try:
                             nruns = int(opts['N'][0])
                             if nruns < 1:
                                 error('Number of runs must be >=1')
                                 return
                         except (KeyError):
                             nruns = 1
                         if nruns == 1:
                             t0 = clock2()
                             runner(filename,prog_ns,prog_ns,exit_ignore=exit_ignore)
                             t1 = clock2()
                             t_usr = t1[0]-t0[0]
                             t_sys = t1[1]-t1[1]
                             print "\nIPython CPU timings (estimated):"
                             print "  User  : %10s s." % t_usr
                             print "  System: %10s s." % t_sys
                         else:
                             runs = range(nruns)
                             t0 = clock2()
                             for nr in runs:
                                 runner(filename,prog_ns,prog_ns,exit_ignore=exit_ignore)
                             t1 = clock2()
                             t_usr = t1[0]-t0[0]
                             t_sys = t1[1]-t1[1]
                             print "\nIPython CPU timings (estimated):"
                             print "Total runs performed:",nruns
                             print "  Times : %10s    %10s" % ('Total','Per run')
                             print "  User  : %10s s, %10s s." % (t_usr,t_usr/nruns)
                             print "  System: %10s s, %10s s." % (t_sys,t_sys/nruns)
                             
                     else:
                         runner(filename,prog_ns,prog_ns,exit_ignore=exit_ignore)
                 if opts.has_key('i'):
                     self.shell.user_ns['__name__'] = __name__save
                 else:
                     # update IPython interactive namespace
                     del prog_ns['__name__']
                     self.shell.user_ns.update(prog_ns)
         finally:
             sys.argv = save_argv
             if restore_main:
                 sys.modules['__main__'] = restore_main
         return stats
 
     def magic_runlog(self, parameter_s =''):
         """Run files as logs.
 
         Usage:\\
           %runlog file1 file2 ...
 
         Run the named files (treating them as log files) in sequence inside
         the interpreter, and return to the prompt.  This is much slower than
         %run because each line is executed in a try/except block, but it
         allows running files with syntax errors in them.
 
         Normally IPython will guess when a file is one of its own logfiles, so
         you can typically use %run even for logs. This shorthand allows you to
         force any file to be treated as a log file."""
 
         for f in parameter_s.split():
             self.shell.safe_execfile(f,self.shell.user_ns,
                                      self.shell.user_ns,islog=1)
 
     def magic_timeit(self, parameter_s =''):
         """Time execution of a Python statement or expression
 
         Usage:\\
           %timeit [-n<N> -r<R> [-t|-c]] statement
 
         Time execution of a Python statement or expression using the timeit
         module.
 
         Options:
         -n<N>: execute the given statement <N> times in a loop. If this value
         is not given, a fitting value is chosen. 
         
         -r<R>: repeat the loop iteration <R> times and take the best result.
         Default: 3
         
         -t: use time.time to measure the time, which is the default on Unix.
         This function measures wall time.
         
         -c: use time.clock to measure the time, which is the default on
         Windows and measures wall time. On Unix, resource.getrusage is used
         instead and returns the CPU user time.
 
         -p<P>: use a precision of <P> digits to display the timing result.
         Default: 3
 
         
         Examples:\\
           In [1]: %timeit pass
           10000000 loops, best of 3: 53.3 ns per loop
 
           In [2]: u = None
 
           In [3]: %timeit u is None
           10000000 loops, best of 3: 184 ns per loop
 
           In [4]: %timeit -r 4 u == None
           1000000 loops, best of 4: 242 ns per loop
 
           In [5]: import time
 
           In [6]: %timeit -n1 time.sleep(2)
           1 loops, best of 3: 2 s per loop
           
 
         The times reported by %timeit will be slightly higher than those reported
         by the timeit.py script when variables are accessed. This is due to the
         fact that %timeit executes the statement in the namespace of the shell,
         compared with timeit.py, which uses a single setup statement to import
         function or create variables. Generally, the bias does not matter as long
         as results from timeit.py are not mixed with those from %timeit."""
         import timeit
         import math
 
         units = ["s", "ms", "\xc2\xb5s", "ns"]
         scaling = [1, 1e3, 1e6, 1e9]
 
         opts, stmt = self.parse_options(parameter_s,'n:r:tcp:')
         if stmt == "":
             return
         timefunc = timeit.default_timer
         number = int(getattr(opts, "n", 0))
         repeat = int(getattr(opts, "r", timeit.default_repeat))
         precision = int(getattr(opts, "p", 3))
         if hasattr(opts, "t"):
             timefunc = time.time
         if hasattr(opts, "c"):
             timefunc = clock
 
         timer = timeit.Timer(timer=timefunc)
         # this code has tight coupling to the inner workings of timeit.Timer,
         # but is there a better way to achieve that the code stmt has access
         # to the shell namespace?
 
         src = timeit.template % {'stmt': timeit.reindent(stmt, 8), 'setup': "pass"}
         code = compile(src, "<magic-timeit>", "exec")
         ns = {}
         exec code in self.shell.user_ns, ns
         timer.inner = ns["inner"]
         
         if number == 0:
             # determine number so that 0.2 <= total time < 2.0
             number = 1
             for i in range(1, 10):
                 number *= 10
                 if timer.timeit(number) >= 0.2:
                     break
         
         best = min(timer.repeat(repeat, number)) / number
 
         if best > 0.0:
             order = min(-int(math.floor(math.log10(best)) // 3), 3)
         else:
             order = 3
-        print "%d loops, best of %d: %.*g %s per loop" % (number, repeat, precision,
+        print "%d loops, best of %d: %.*g %s per loop" % (number, repeat,
+                                                          precision,
                                                           best * scaling[order],
                                                           units[order])
 
-
-
-        
     def magic_time(self,parameter_s = ''):
         """Time execution of a Python statement or expression.
 
         The CPU and wall clock times are printed, and the value of the
         expression (if any) is returned.  Note that under Win32, system time
         is always reported as 0, since it can not be measured.
 
         This function provides very basic timing functionality.  In Python
-        2.3, the timeit module offers more control and sophistication, but for
-        now IPython supports Python 2.2, so we can not rely on timeit being
-        present.
+        2.3, the timeit module offers more control and sophistication, so this
+        could be rewritten to use it (patches welcome).
         
         Some examples:
 
           In [1]: time 2**128
           CPU times: user 0.00 s, sys: 0.00 s, total: 0.00 s
           Wall time: 0.00
           Out[1]: 340282366920938463463374607431768211456L
 
           In [2]: n = 1000000
 
           In [3]: time sum(range(n))
           CPU times: user 1.20 s, sys: 0.05 s, total: 1.25 s
           Wall time: 1.37
           Out[3]: 499999500000L
 
           In [4]: time print 'hello world'
           hello world
           CPU times: user 0.00 s, sys: 0.00 s, total: 0.00 s
           Wall time: 0.00
           """
         
         # fail immediately if the given expression can't be compiled
         try:
             mode = 'eval'
             code = compile(parameter_s,'<timed eval>',mode)
         except SyntaxError:
             mode = 'exec'
             code = compile(parameter_s,'<timed exec>',mode)
         # skew measurement as little as possible
         glob = self.shell.user_ns
         clk = clock2
         wtime = time.time
         # time execution
         wall_st = wtime()
         if mode=='eval':
             st = clk()
             out = eval(code,glob)
             end = clk()
         else:
             st = clk()
             exec code in glob
             end = clk()
             out = None
         wall_end = wtime()
         # Compute actual times and report
         wall_time = wall_end-wall_st
         cpu_user = end[0]-st[0]
         cpu_sys = end[1]-st[1]
         cpu_tot = cpu_user+cpu_sys
         print "CPU times: user %.2f s, sys: %.2f s, total: %.2f s" % \
               (cpu_user,cpu_sys,cpu_tot)
         print "Wall time: %.2f" % wall_time
         return out
 
     def magic_macro(self,parameter_s = ''):
         """Define a set of input lines as a macro for future re-execution.
 
         Usage:\\
           %macro [options] name n1-n2 n3-n4 ... n5 .. n6 ...
 
         Options:
         
           -r: use 'raw' input.  By default, the 'processed' history is used,
           so that magics are loaded in their transformed version to valid
           Python.  If this option is given, the raw input as typed as the
           command line is used instead.
 
         This will define a global variable called `name` which is a string
         made of joining the slices and lines you specify (n1,n2,... numbers
         above) from your input history into a single string. This variable
         acts like an automatic function which re-executes those lines as if
         you had typed them. You just type 'name' at the prompt and the code
         executes.
 
         The notation for indicating number ranges is: n1-n2 means 'use line
         numbers n1,...n2' (the endpoint is included).  That is, '5-7' means
         using the lines numbered 5,6 and 7.
 
         Note: as a 'hidden' feature, you can also use traditional python slice
         notation, where N:M means numbers N through M-1.
 
         For example, if your history contains (%hist prints it):
         
           44: x=1\\
           45: y=3\\
           46: z=x+y\\
           47: print x\\
           48: a=5\\
           49: print 'x',x,'y',y\\
 
         you can create a macro with lines 44 through 47 (included) and line 49
         called my_macro with:
 
           In [51]: %macro my_macro 44-47 49
 
         Now, typing `my_macro` (without quotes) will re-execute all this code
         in one pass.
 
         You don't need to give the line-numbers in order, and any given line
         number can appear multiple times. You can assemble macros with any
         lines from your input history in any order.
 
         The macro is a simple object which holds its value in an attribute,
         but IPython's display system checks for macros and executes them as
         code instead of printing them when you type their name.
 
         You can view a macro's contents by explicitly printing it with:
         
           'print macro_name'.
 
         For one-off cases which DON'T contain magic function calls in them you
         can obtain similar results by explicitly executing slices from your
         input history with:
 
           In [60]: exec In[44:48]+In[49]"""
 
         opts,args = self.parse_options(parameter_s,'r',mode='list')
         name,ranges = args[0], args[1:]
         #print 'rng',ranges  # dbg
         lines = self.extract_input_slices(ranges,opts.has_key('r'))
         macro = Macro(lines)
         self.shell.user_ns.update({name:macro})
         print 'Macro `%s` created. To execute, type its name (without quotes).' % name
         print 'Macro contents:'
         print macro,
 
     def magic_save(self,parameter_s = ''):
         """Save a set of lines to a given filename.
 
         Usage:\\
           %save [options] filename n1-n2 n3-n4 ... n5 .. n6 ...
 
         Options:
         
           -r: use 'raw' input.  By default, the 'processed' history is used,
           so that magics are loaded in their transformed version to valid
           Python.  If this option is given, the raw input as typed as the
           command line is used instead.
 
         This function uses the same syntax as %macro for line extraction, but
         instead of creating a macro it saves the resulting string to the
         filename you specify.
 
         It adds a '.py' extension to the file if you don't do so yourself, and
         it asks for confirmation before overwriting existing files."""
 
         opts,args = self.parse_options(parameter_s,'r',mode='list')
         fname,ranges = args[0], args[1:]
         if not fname.endswith('.py'):
             fname += '.py'
         if os.path.isfile(fname):
             ans = raw_input('File `%s` exists. Overwrite (y/[N])? ' % fname)
             if ans.lower() not in ['y','yes']:
                 print 'Operation cancelled.'
                 return
         cmds = ''.join(self.extract_input_slices(ranges,opts.has_key('r')))
         f = file(fname,'w')
         f.write(cmds)
         f.close()
         print 'The following commands were written to file `%s`:' % fname
         print cmds
 
     def _edit_macro(self,mname,macro):
         """open an editor with the macro data in a file"""
         filename = self.shell.mktempfile(macro.value)
         self.shell.hooks.editor(filename)
 
         # and make a new macro object, to replace the old one
         mfile = open(filename)
         mvalue = mfile.read()
         mfile.close()
         self.shell.user_ns[mname] = Macro(mvalue)
 
     def magic_ed(self,parameter_s=''):
         """Alias to %edit."""
         return self.magic_edit(parameter_s)
 
     def magic_edit(self,parameter_s='',last_call=['','']):
         """Bring up an editor and execute the resulting code.
 
         Usage:
           %edit [options] [args]
 
         %edit runs IPython's editor hook.  The default version of this hook is
         set to call the __IPYTHON__.rc.editor command.  This is read from your
         environment variable $EDITOR.  If this isn't found, it will default to
         vi under Linux/Unix and to notepad under Windows.  See the end of this
         docstring for how to change the editor hook.
 
         You can also set the value of this editor via the command line option
         '-editor' or in your ipythonrc file. This is useful if you wish to use
         specifically for IPython an editor different from your typical default
         (and for Windows users who typically don't set environment variables).
 
         This command allows you to conveniently edit multi-line code right in
         your IPython session.
         
         If called without arguments, %edit opens up an empty editor with a
         temporary file and will execute the contents of this file when you
         close it (don't forget to save it!).
 
 
         Options:
 
         -p: this will call the editor with the same data as the previous time
         it was used, regardless of how long ago (in your current session) it
         was.
 
         -r: use 'raw' input.  This option only applies to input taken from the
         user's history.  By default, the 'processed' history is used, so that
         magics are loaded in their transformed version to valid Python.  If
         this option is given, the raw input as typed as the command line is
         used instead.  When you exit the editor, it will be executed by
         IPython's own processor.
         
         -x: do not execute the edited code immediately upon exit. This is
         mainly useful if you are editing programs which need to be called with
         command line arguments, which you can then do using %run.
 
 
         Arguments:
 
         If arguments are given, the following possibilites exist:
 
         - The arguments are numbers or pairs of colon-separated numbers (like
         1 4:8 9). These are interpreted as lines of previous input to be
         loaded into the editor. The syntax is the same of the %macro command.
 
         - If the argument doesn't start with a number, it is evaluated as a
         variable and its contents loaded into the editor. You can thus edit
         any string which contains python code (including the result of
         previous edits).
 
         - If the argument is the name of an object (other than a string),
         IPython will try to locate the file where it was defined and open the
         editor at the point where it is defined. You can use `%edit function`
         to load an editor exactly at the point where 'function' is defined,
         edit it and have the file be executed automatically.
 
         If the object is a macro (see %macro for details), this opens up your
         specified editor with a temporary file containing the macro's data.
         Upon exit, the macro is reloaded with the contents of the file.
 
         Note: opening at an exact line is only supported under Unix, and some
         editors (like kedit and gedit up to Gnome 2.8) do not understand the
         '+NUMBER' parameter necessary for this feature. Good editors like
         (X)Emacs, vi, jed, pico and joe all do.
 
         - If the argument is not found as a variable, IPython will look for a
         file with that name (adding .py if necessary) and load it into the
         editor. It will execute its contents with execfile() when you exit,
         loading any code in the file into your interactive namespace.
 
         After executing your code, %edit will return as output the code you
         typed in the editor (except when it was an existing file). This way
         you can reload the code in further invocations of %edit as a variable,
         via _<NUMBER> or Out[<NUMBER>], where <NUMBER> is the prompt number of
         the output.
 
         Note that %edit is also available through the alias %ed.
 
         This is an example of creating a simple function inside the editor and
         then modifying it. First, start up the editor:
 
         In [1]: ed\\
         Editing... done. Executing edited code...\\
         Out[1]: 'def foo():\\n    print "foo() was defined in an editing session"\\n'
 
         We can then call the function foo():
         
         In [2]: foo()\\
         foo() was defined in an editing session
 
         Now we edit foo.  IPython automatically loads the editor with the
         (temporary) file where foo() was previously defined:
         
         In [3]: ed foo\\
         Editing... done. Executing edited code...
 
         And if we call foo() again we get the modified version:
         
         In [4]: foo()\\
         foo() has now been changed!
 
         Here is an example of how to edit a code snippet successive
         times. First we call the editor:
 
         In [8]: ed\\
         Editing... done. Executing edited code...\\
         hello\\
         Out[8]: "print 'hello'\\n"
 
         Now we call it again with the previous output (stored in _):
 
         In [9]: ed _\\
         Editing... done. Executing edited code...\\
         hello world\\
         Out[9]: "print 'hello world'\\n"
 
         Now we call it with the output #8 (stored in _8, also as Out[8]):
 
         In [10]: ed _8\\
         Editing... done. Executing edited code...\\
         hello again\\
         Out[10]: "print 'hello again'\\n"
 
 
         Changing the default editor hook:
 
         If you wish to write your own editor hook, you can put it in a
         configuration file which you load at startup time.  The default hook
         is defined in the IPython.hooks module, and you can use that as a
         starting example for further modifications.  That file also has
         general instructions on how to set a new hook for use once you've
         defined it."""
         
         # FIXME: This function has become a convoluted mess.  It needs a
         # ground-up rewrite with clean, simple logic.
 
         def make_filename(arg):
             "Make a filename from the given args"
             try:
                 filename = get_py_filename(arg)
             except IOError:
                 if args.endswith('.py'):
                     filename = arg
                 else:
                     filename = None
             return filename
 
         # custom exceptions
         class DataIsObject(Exception): pass
 
-        opts,args = self.parse_options(parameter_s,'prx')
+        opts,args = self.parse_options(parameter_s,'prxn=i')
+
+        print 'opt.n: <%r>' % opts.n  # dbg
+        
         # Set a few locals from the options for convenience:
         opts_p = opts.has_key('p')
         opts_r = opts.has_key('r')
 
         # Default line number value
         lineno = None
         if opts_p:
             args = '_%s' % last_call[0]
             if not self.shell.user_ns.has_key(args):
                 args = last_call[1]
             
         # use last_call to remember the state of the previous call, but don't
         # let it be clobbered by successive '-p' calls.
         try:
             last_call[0] = self.shell.outputcache.prompt_count
             if not opts_p:
                 last_call[1] = parameter_s
         except:
             pass
 
         # by default this is done with temp files, except when the given
         # arg is a filename
         use_temp = 1
 
         if re.match(r'\d',args):
             # Mode where user specifies ranges of lines, like in %macro.
             # This means that you can't edit files whose names begin with
             # numbers this way. Tough.
             ranges = args.split()
             data = ''.join(self.extract_input_slices(ranges,opts_r))
         elif args.endswith('.py'):
             filename = make_filename(args)
             data = ''
             use_temp = 0
         elif args:
             try:
                 # Load the parameter given as a variable. If not a string,
                 # process it as an object instead (below)
 
                 #print '*** args',args,'type',type(args)  # dbg
                 data = eval(args,self.shell.user_ns)
                 if not type(data) in StringTypes:
                     raise DataIsObject
 
             except (NameError,SyntaxError):
                 # given argument is not a variable, try as a filename
                 filename = make_filename(args)
                 if filename is None:
                     warn("Argument given (%s) can't be found as a variable "
                          "or as a filename." % args)
                     return
 
                 data = ''
                 use_temp = 0
             except DataIsObject:
 
                 # macros have a special edit function
                 if isinstance(data,Macro):
                     self._edit_macro(args,data)
                     return
                 
                 # For objects, try to edit the file where they are defined
                 try:
                     filename = inspect.getabsfile(data)
                     datafile = 1
                 except TypeError:
                     filename = make_filename(args)
                     datafile = 1
                     warn('Could not find file where `%s` is defined.\n'
                          'Opening a file named `%s`' % (args,filename))
                 # Now, make sure we can actually read the source (if it was in
                 # a temp file it's gone by now).
                 if datafile:
                     try:
                         lineno = inspect.getsourcelines(data)[1]
                     except IOError:
                         filename = make_filename(args)
                         if filename is None:
                             warn('The file `%s` where `%s` was defined cannot '
                                  'be read.' % (filename,data))
                             return
                 use_temp = 0
         else:
             data = ''
 
         if use_temp:
             filename = self.shell.mktempfile(data)
             print 'IPython will make a temporary file named:',filename
 
         # do actual editing here
         print 'Editing...',
         sys.stdout.flush()
         self.shell.hooks.editor(filename,lineno)
         if opts.has_key('x'):  # -x prevents actual execution
             print
         else:
             print 'done. Executing edited code...'
             if opts_r:
                 self.shell.runlines(file_read(filename))
             else:
                 self.shell.safe_execfile(filename,self.shell.user_ns)
         if use_temp:
             try:
                 return open(filename).read()
             except IOError,msg:
                 if msg.filename == filename:
                     warn('File not found. Did you forget to save?')
                     return
                 else:
                     self.shell.showtraceback()
 
     def magic_xmode(self,parameter_s = ''):
         """Switch modes for the exception handlers.
 
         Valid modes: Plain, Context and Verbose.
 
         If called without arguments, acts as a toggle."""
 
         def xmode_switch_err(name):
             warn('Error changing %s exception modes.\n%s' %
                  (name,sys.exc_info()[1]))
 
         shell = self.shell
         new_mode = parameter_s.strip().capitalize()
         try:
             shell.InteractiveTB.set_mode(mode=new_mode)
             print 'Exception reporting mode:',shell.InteractiveTB.mode
         except:
             xmode_switch_err('user')
 
         # threaded shells use a special handler in sys.excepthook
         if shell.isthreaded:
             try:
                 shell.sys_excepthook.set_mode(mode=new_mode)
             except:
                 xmode_switch_err('threaded')
             
     def magic_colors(self,parameter_s = ''):
         """Switch color scheme for prompts, info system and exception handlers.
 
         Currently implemented schemes: NoColor, Linux, LightBG.
 
         Color scheme names are not case-sensitive."""
 
         def color_switch_err(name):
             warn('Error changing %s color schemes.\n%s' %
                  (name,sys.exc_info()[1]))
             
         
         new_scheme = parameter_s.strip()
         if not new_scheme:
             print 'You must specify a color scheme.'
             return
         import IPython.rlineimpl as readline
         if not readline.have_readline:
             msg = """\
 Proper color support under MS Windows requires Gary Bishop's readline library.
 You can find it at:
 http://sourceforge.net/projects/uncpythontools
 Gary's readline needs the ctypes module, from:
 http://starship.python.net/crew/theller/ctypes
 
 Defaulting color scheme to 'NoColor'"""
             new_scheme = 'NoColor'
             warn(msg)
         # local shortcut
         shell = self.shell
         
         # Set prompt colors
         try:
             shell.outputcache.set_colors(new_scheme)
         except:
             color_switch_err('prompt')
         else:
             shell.rc.colors = \
                        shell.outputcache.color_table.active_scheme_name
         # Set exception colors
         try:
             shell.InteractiveTB.set_colors(scheme = new_scheme)
             shell.SyntaxTB.set_colors(scheme = new_scheme)
         except:
             color_switch_err('exception')
 
         # threaded shells use a verbose traceback in sys.excepthook
         if shell.isthreaded:
             try:
                 shell.sys_excepthook.set_colors(scheme=new_scheme)
             except:
                 color_switch_err('system exception handler')
         
         # Set info (for 'object?') colors
         if shell.rc.color_info:
             try:
                 shell.inspector.set_active_scheme(new_scheme)
             except:
                 color_switch_err('object inspector')
         else:
             shell.inspector.set_active_scheme('NoColor')
                 
     def magic_color_info(self,parameter_s = ''):
         """Toggle color_info.
 
         The color_info configuration parameter controls whether colors are
         used for displaying object details (by things like %psource, %pfile or
         the '?' system). This function toggles this value with each call.
 
         Note that unless you have a fairly recent pager (less works better
         than more) in your system, using colored object information displays
         will not work properly. Test it and see."""
         
         self.shell.rc.color_info = 1 - self.shell.rc.color_info
         self.magic_colors(self.shell.rc.colors)
         print 'Object introspection functions have now coloring:',
         print ['OFF','ON'][self.shell.rc.color_info]
 
     def magic_Pprint(self, parameter_s=''):
         """Toggle pretty printing on/off."""
         
         self.shell.rc.pprint = 1 - self.shell.rc.pprint
         print 'Pretty printing has been turned', \
               ['OFF','ON'][self.shell.rc.pprint]
         
     def magic_exit(self, parameter_s=''):
         """Exit IPython, confirming if configured to do so.
 
         You can configure whether IPython asks for confirmation upon exit by
         setting the confirm_exit flag in the ipythonrc file."""
 
         self.shell.exit()
 
     def magic_quit(self, parameter_s=''):
         """Exit IPython, confirming if configured to do so (like %exit)"""
 
         self.shell.exit()
         
     def magic_Exit(self, parameter_s=''):
         """Exit IPython without confirmation."""
 
         self.shell.exit_now = True
 
     def magic_Quit(self, parameter_s=''):
         """Exit IPython without confirmation (like %Exit)."""
 
         self.shell.exit_now = True
         
     #......................................................................
     # Functions to implement unix shell-type things
     
     def magic_alias(self, parameter_s = ''):
         """Define an alias for a system command.
 
         '%alias alias_name cmd' defines 'alias_name' as an alias for 'cmd'
 
         Then, typing 'alias_name params' will execute the system command 'cmd
         params' (from your underlying operating system).
 
         Aliases have lower precedence than magic functions and Python normal
         variables, so if 'foo' is both a Python variable and an alias, the
         alias can not be executed until 'del foo' removes the Python variable.
 
         You can use the %l specifier in an alias definition to represent the
         whole line when the alias is called.  For example:
 
           In [2]: alias all echo "Input in brackets: <%l>"\\
           In [3]: all hello world\\
           Input in brackets: <hello world>
 
         You can also define aliases with parameters using %s specifiers (one
         per parameter):
         
           In [1]: alias parts echo first %s second %s\\
           In [2]: %parts A B\\
           first A second B\\
           In [3]: %parts A\\
           Incorrect number of arguments: 2 expected.\\
           parts is an alias to: 'echo first %s second %s'
 
         Note that %l and %s are mutually exclusive.  You can only use one or
         the other in your aliases.
 
         Aliases expand Python variables just like system calls using ! or !! 
         do: all expressions prefixed with '$' get expanded.  For details of
         the semantic rules, see PEP-215:
         http://www.python.org/peps/pep-0215.html.  This is the library used by
         IPython for variable expansion.  If you want to access a true shell
         variable, an extra $ is necessary to prevent its expansion by IPython:
 
         In [6]: alias show echo\\
         In [7]: PATH='A Python string'\\
         In [8]: show $PATH\\
         A Python string\\
         In [9]: show $$PATH\\
         /usr/local/lf9560/bin:/usr/local/intel/compiler70/ia32/bin:...
 
         You can use the alias facility to acess all of $PATH.  See the %rehash
         and %rehashx functions, which automatically create aliases for the
         contents of your $PATH.
 
         If called with no parameters, %alias prints the current alias table."""
 
         par = parameter_s.strip()
         if not par:
             if self.shell.rc.automagic:
                 prechar = ''
             else:
                 prechar = self.shell.ESC_MAGIC
             #print 'Alias\t\tSystem Command\n'+'-'*30
             atab = self.shell.alias_table
             aliases = atab.keys()
             aliases.sort()
             res = []
             for alias in aliases:
                 res.append((alias, atab[alias][1]))                
             print "Total number of aliases:",len(aliases)
             return res
         try:
             alias,cmd = par.split(None,1)
         except:
             print OInspect.getdoc(self.magic_alias)
         else:
             nargs = cmd.count('%s')
             if nargs>0 and cmd.find('%l')>=0:
                 error('The %s and %l specifiers are mutually exclusive '
                       'in alias definitions.')
             else:  # all looks OK
                 self.shell.alias_table[alias] = (nargs,cmd)
                 self.shell.alias_table_validate(verbose=0)
     # end magic_alias
 
     def magic_unalias(self, parameter_s = ''):
         """Remove an alias"""
 
         aname = parameter_s.strip()
         if aname in self.shell.alias_table:
             del self.shell.alias_table[aname]
             
     def magic_rehash(self, parameter_s = ''):
         """Update the alias table with all entries in $PATH.
 
         This version does no checks on execute permissions or whether the
         contents of $PATH are truly files (instead of directories or something
         else).  For such a safer (but slower) version, use %rehashx."""
 
         # This function (and rehashx) manipulate the alias_table directly
         # rather than calling magic_alias, for speed reasons.  A rehash on a
         # typical Linux box involves several thousand entries, so efficiency
         # here is a top concern.
         
         path = filter(os.path.isdir,os.environ['PATH'].split(os.pathsep))
         alias_table = self.shell.alias_table
         for pdir in path:
             for ff in os.listdir(pdir):
                 # each entry in the alias table must be (N,name), where
                 # N is the number of positional arguments of the alias.
                 alias_table[ff] = (0,ff)
         # Make sure the alias table doesn't contain keywords or builtins
         self.shell.alias_table_validate()
         # Call again init_auto_alias() so we get 'rm -i' and other modified
         # aliases since %rehash will probably clobber them
         self.shell.init_auto_alias()
 
     def magic_rehashx(self, parameter_s = ''):
         """Update the alias table with all executable files in $PATH.
 
         This version explicitly checks that every entry in $PATH is a file
         with execute access (os.X_OK), so it is much slower than %rehash.
 
         Under Windows, it checks executability as a match agains a
         '|'-separated string of extensions, stored in the IPython config
         variable win_exec_ext.  This defaults to 'exe|com|bat'. """
         
         path = [os.path.abspath(os.path.expanduser(p)) for p in 
             os.environ['PATH'].split(os.pathsep)]
         path = filter(os.path.isdir,path)
         
         alias_table = self.shell.alias_table
         syscmdlist = []
         if os.name == 'posix':
             isexec = lambda fname:os.path.isfile(fname) and \
                      os.access(fname,os.X_OK)
         else:
 
             try:
                 winext = os.environ['pathext'].replace(';','|').replace('.','')
             except KeyError:
                 winext = 'exe|com|bat'
     
             execre = re.compile(r'(.*)\.(%s)$' % winext,re.IGNORECASE)
             isexec = lambda fname:os.path.isfile(fname) and execre.match(fname)
         savedir = os.getcwd()
         try:
             # write the whole loop for posix/Windows so we don't have an if in
             # the innermost part
             if os.name == 'posix':
                 for pdir in path:
                     os.chdir(pdir)
                     for ff in os.listdir(pdir):
                         if isexec(ff):
                             # each entry in the alias table must be (N,name),
                             # where N is the number of positional arguments of the
                             # alias.
                             alias_table[ff] = (0,ff)
                             syscmdlist.append(ff)
             else:
                 for pdir in path:
                     os.chdir(pdir)
                     for ff in os.listdir(pdir):
                         if isexec(ff):
                             alias_table[execre.sub(r'\1',ff)] = (0,ff)
                             syscmdlist.append(ff)
             # Make sure the alias table doesn't contain keywords or builtins
             self.shell.alias_table_validate()
             # Call again init_auto_alias() so we get 'rm -i' and other
             # modified aliases since %rehashx will probably clobber them
             self.shell.init_auto_alias()
-            db = self.getapi().getdb()
+            db = self.getapi().db
             db['syscmdlist'] = syscmdlist
         finally:
             os.chdir(savedir)
         
     def magic_pwd(self, parameter_s = ''):
         """Return the current working directory path."""
         return os.getcwd()
 
     def magic_cd(self, parameter_s=''):
         """Change the current working directory.
 
         This command automatically maintains an internal list of directories
         you visit during your IPython session, in the variable _dh. The
         command %dhist shows this history nicely formatted.
 
         Usage:
 
           cd 'dir': changes to directory 'dir'.
 
           cd -: changes to the last visited directory.
 
           cd -<n>: changes to the n-th directory in the directory history.
 
           cd -b <bookmark_name>: jump to a bookmark set by %bookmark
              (note: cd <bookmark_name> is enough if there is no
               directory <bookmark_name>, but a bookmark with the name exists.)
 
         Options:
 
         -q: quiet.  Do not print the working directory after the cd command is
         executed.  By default IPython's cd command does print this directory,
         since the default prompts do not display path information.
         
         Note that !cd doesn't work for this purpose because the shell where
         !command runs is immediately discarded after executing 'command'."""
 
         parameter_s = parameter_s.strip()
         #bkms = self.shell.persist.get("bookmarks",{})
 
         numcd = re.match(r'(-)(\d+)$',parameter_s)
         # jump in directory history by number
         if numcd:
             nn = int(numcd.group(2))
             try:
                 ps = self.shell.user_ns['_dh'][nn]
             except IndexError:
                 print 'The requested directory does not exist in history.'
                 return
             else:
                 opts = {}
         else:
             #turn all non-space-escaping backslashes to slashes, 
             # for c:\windows\directory\names\
             parameter_s = re.sub(r'\\(?! )','/', parameter_s)            
             opts,ps = self.parse_options(parameter_s,'qb',mode='string')
         # jump to previous
         if ps == '-':
             try:
                 ps = self.shell.user_ns['_dh'][-2]
             except IndexError:
                 print 'No previous directory to change to.'
                 return
         # jump to bookmark if needed
         else:
             if not os.path.isdir(ps) or opts.has_key('b'):
                 bkms = self.db.get('bookmarks', {})
             
                 if bkms.has_key(ps):
                     target = bkms[ps]
                     print '(bookmark:%s) -> %s' % (ps,target)
                     ps = target
                 else:
                     if opts.has_key('b'):
                         error("Bookmark '%s' not found.  "
                               "Use '%%bookmark -l' to see your bookmarks." % ps)
                         return
             
         # at this point ps should point to the target dir
         if ps:
             try:
                 os.chdir(os.path.expanduser(ps))
                 ttitle = ("IPy:" + (
                     os.getcwd() == '/' and '/' or os.path.basename(os.getcwd())))
                 platutils.set_term_title(ttitle)
             except OSError:
                 print sys.exc_info()[1]
             else:
                 self.shell.user_ns['_dh'].append(os.getcwd())
         else:
             os.chdir(self.shell.home_dir)
             platutils.set_term_title("IPy:~")
             self.shell.user_ns['_dh'].append(os.getcwd())
         if not 'q' in opts:
             print self.shell.user_ns['_dh'][-1]
 
     def magic_dhist(self, parameter_s=''):
         """Print your history of visited directories.
 
         %dhist       -> print full history\\
         %dhist n     -> print last n entries only\\
         %dhist n1 n2 -> print entries between n1 and n2 (n1 not included)\\
 
         This history is automatically maintained by the %cd command, and
         always available as the global list variable _dh. You can use %cd -<n>
         to go to directory number <n>."""
 
         dh = self.shell.user_ns['_dh']
         if parameter_s:
             try:
                 args = map(int,parameter_s.split())
             except:
                 self.arg_err(Magic.magic_dhist)
                 return
             if len(args) == 1:
                 ini,fin = max(len(dh)-(args[0]),0),len(dh)
             elif len(args) == 2:
                 ini,fin = args
             else:
                 self.arg_err(Magic.magic_dhist)
                 return
         else:
             ini,fin = 0,len(dh)
         nlprint(dh,
                 header = 'Directory history (kept in _dh)',
                 start=ini,stop=fin)
 
     def magic_env(self, parameter_s=''):
         """List environment variables."""
         
         return os.environ.data
 
     def magic_pushd(self, parameter_s=''):
         """Place the current dir on stack and change directory.
         
         Usage:\\
           %pushd ['dirname']
 
         %pushd with no arguments does a %pushd to your home directory.
         """
         if parameter_s == '': parameter_s = '~'
         dir_s = self.shell.dir_stack
         if len(dir_s)>0 and os.path.expanduser(parameter_s) != \
            os.path.expanduser(self.shell.dir_stack[0]):
             try:
                 self.magic_cd(parameter_s)
                 dir_s.insert(0,os.getcwd().replace(self.home_dir,'~'))
                 self.magic_dirs()
             except:
                 print 'Invalid directory'
         else:
             print 'You are already there!'
 
     def magic_popd(self, parameter_s=''):
         """Change to directory popped off the top of the stack.
         """
         if len (self.shell.dir_stack) > 1:
             self.shell.dir_stack.pop(0)
             self.magic_cd(self.shell.dir_stack[0])
             print self.shell.dir_stack[0]
         else:
             print "You can't remove the starting directory from the stack:",\
                   self.shell.dir_stack
 
     def magic_dirs(self, parameter_s=''):
         """Return the current directory stack."""
 
         return self.shell.dir_stack[:]
 
     def magic_sc(self, parameter_s=''):
         """Shell capture - execute a shell command and capture its output.
 
         DEPRECATED. Suboptimal, retained for backwards compatibility.
         
         You should use the form 'var = !command' instead. Example:
          
          "%sc -l myfiles = ls ~" should now be written as
             
          "myfiles = !ls ~"
          
         myfiles.s, myfiles.l and myfiles.n still apply as documented
         below.
 
         --
         %sc [options] varname=command
 
         IPython will run the given command using commands.getoutput(), and
         will then update the user's interactive namespace with a variable
         called varname, containing the value of the call.  Your command can
         contain shell wildcards, pipes, etc.
 
         The '=' sign in the syntax is mandatory, and the variable name you
         supply must follow Python's standard conventions for valid names.
         
         (A special format without variable name exists for internal use)
 
         Options:
 
           -l: list output.  Split the output on newlines into a list before
           assigning it to the given variable.  By default the output is stored
           as a single string.
 
           -v: verbose.  Print the contents of the variable.
 
         In most cases you should not need to split as a list, because the
         returned value is a special type of string which can automatically
         provide its contents either as a list (split on newlines) or as a
         space-separated string.  These are convenient, respectively, either
         for sequential processing or to be passed to a shell command.
 
         For example:
 
             # Capture into variable a
             In [9]: sc a=ls *py
 
             # a is a string with embedded newlines
             In [10]: a
             Out[10]: 'setup.py\nwin32_manual_post_install.py'
 
             # which can be seen as a list:
             In [11]: a.l
             Out[11]: ['setup.py', 'win32_manual_post_install.py']
 
             # or as a whitespace-separated string:
             In [12]: a.s
             Out[12]: 'setup.py win32_manual_post_install.py'
 
             # a.s is useful to pass as a single command line:
             In [13]: !wc -l $a.s
               146 setup.py
               130 win32_manual_post_install.py
               276 total
 
             # while the list form is useful to loop over:
             In [14]: for f in a.l:
                ....:      !wc -l $f
                ....:
             146 setup.py
             130 win32_manual_post_install.py
 
         Similiarly, the lists returned by the -l option are also special, in
         the sense that you can equally invoke the .s attribute on them to
         automatically get a whitespace-separated string from their contents:
 
             In [1]: sc -l b=ls *py
 
             In [2]: b
             Out[2]: ['setup.py', 'win32_manual_post_install.py']
 
             In [3]: b.s
             Out[3]: 'setup.py win32_manual_post_install.py'
 
         In summary, both the lists and strings used for ouptut capture have
         the following special attributes:
 
             .l (or .list) : value as list.
             .n (or .nlstr): value as newline-separated string.
             .s (or .spstr): value as space-separated string.
         """
 
         opts,args = self.parse_options(parameter_s,'lv')
         # Try to get a variable name and command to run
         try:
             # the variable name must be obtained from the parse_options
             # output, which uses shlex.split to strip options out.
             var,_ = args.split('=',1)
             var = var.strip()
             # But the the command has to be extracted from the original input
             # parameter_s, not on what parse_options returns, to avoid the
             # quote stripping which shlex.split performs on it.
             _,cmd = parameter_s.split('=',1)
         except ValueError:
             var,cmd = '',''
         # If all looks ok, proceed
         out,err = self.shell.getoutputerror(cmd)
         if err:
             print >> Term.cerr,err
         if opts.has_key('l'):
             out = SList(out.split('\n'))
         else:
             out = LSString(out)
         if opts.has_key('v'):
             print '%s ==\n%s' % (var,pformat(out))
         if var:
             self.shell.user_ns.update({var:out})
         else:
             return out
 
     def magic_sx(self, parameter_s=''):
         """Shell execute - run a shell command and capture its output.
 
         %sx command
 
         IPython will run the given command using commands.getoutput(), and
         return the result formatted as a list (split on '\\n').  Since the
         output is _returned_, it will be stored in ipython's regular output
         cache Out[N] and in the '_N' automatic variables.
 
         Notes:
 
         1) If an input line begins with '!!', then %sx is automatically
         invoked.  That is, while:
           !ls
         causes ipython to simply issue system('ls'), typing
           !!ls
         is a shorthand equivalent to:
           %sx ls
         
         2) %sx differs from %sc in that %sx automatically splits into a list,
         like '%sc -l'.  The reason for this is to make it as easy as possible
         to process line-oriented shell output via further python commands.
         %sc is meant to provide much finer control, but requires more
         typing.
 
         3) Just like %sc -l, this is a list with special attributes:
 
           .l (or .list) : value as list.
           .n (or .nlstr): value as newline-separated string.
           .s (or .spstr): value as whitespace-separated string.
 
         This is very useful when trying to use such lists as arguments to
         system commands."""
 
         if parameter_s:
             out,err = self.shell.getoutputerror(parameter_s)
             if err:
                 print >> Term.cerr,err
             return SList(out.split('\n'))
 
     def magic_bg(self, parameter_s=''):
         """Run a job in the background, in a separate thread.
 
         For example,
 
           %bg myfunc(x,y,z=1)
 
         will execute 'myfunc(x,y,z=1)' in a background thread.  As soon as the
         execution starts, a message will be printed indicating the job
         number.  If your job number is 5, you can use
 
           myvar = jobs.result(5)  or  myvar = jobs[5].result
 
         to assign this result to variable 'myvar'.
 
         IPython has a job manager, accessible via the 'jobs' object.  You can
         type jobs? to get more information about it, and use jobs.<TAB> to see
         its attributes.  All attributes not starting with an underscore are
         meant for public use.
 
         In particular, look at the jobs.new() method, which is used to create
         new jobs.  This magic %bg function is just a convenience wrapper
         around jobs.new(), for expression-based jobs.  If you want to create a
         new job with an explicit function object and arguments, you must call
         jobs.new() directly.
 
         The jobs.new docstring also describes in detail several important
         caveats associated with a thread-based model for background job
         execution.  Type jobs.new? for details.
 
         You can check the status of all jobs with jobs.status().
 
         The jobs variable is set by IPython into the Python builtin namespace.
         If you ever declare a variable named 'jobs', you will shadow this
         name.  You can either delete your global jobs variable to regain
         access to the job manager, or make a new name and assign it manually
         to the manager (stored in IPython's namespace).  For example, to
         assign the job manager to the Jobs name, use:
 
           Jobs = __builtins__.jobs"""
         
         self.shell.jobs.new(parameter_s,self.shell.user_ns)
         
     
     def magic_bookmark(self, parameter_s=''):
         """Manage IPython's bookmark system.
 
         %bookmark <name>       - set bookmark to current dir
         %bookmark <name> <dir> - set bookmark to <dir>
         %bookmark -l           - list all bookmarks
         %bookmark -d <name>    - remove bookmark
         %bookmark -r           - remove all bookmarks
 
         You can later on access a bookmarked folder with:
           %cd -b <name>
         or simply '%cd <name>' if there is no directory called <name> AND
         there is such a bookmark defined.
 
         Your bookmarks persist through IPython sessions, but they are
         associated with each profile."""
 
         opts,args = self.parse_options(parameter_s,'drl',mode='list')
         if len(args) > 2:
             error('You can only give at most two arguments')
             return
 
         bkms = self.db.get('bookmarks',{})
             
         if opts.has_key('d'):
             try:
                 todel = args[0]
             except IndexError:
                 error('You must provide a bookmark to delete')
             else:
                 try:
                     del bkms[todel]
                 except:
                     error("Can't delete bookmark '%s'" % todel)
         elif opts.has_key('r'):
             bkms = {}
         elif opts.has_key('l'):
             bks = bkms.keys()
             bks.sort()
             if bks:
                 size = max(map(len,bks))
             else:
                 size = 0
             fmt = '%-'+str(size)+'s -> %s'
             print 'Current bookmarks:'
             for bk in bks:
                 print fmt % (bk,bkms[bk])
         else:
             if not args:
                 error("You must specify the bookmark name")
             elif len(args)==1:
                 bkms[args[0]] = os.getcwd()
             elif len(args)==2:
                 bkms[args[0]] = args[1]
         self.db['bookmarks'] = bkms
 
     def magic_pycat(self, parameter_s=''):
         """Show a syntax-highlighted file through a pager.
 
         This magic is similar to the cat utility, but it will assume the file
         to be Python source and will show it with syntax highlighting. """
         
         try:
             filename = get_py_filename(parameter_s)
             cont = file_read(filename)
         except IOError:
             try:
                 cont = eval(parameter_s,self.user_ns)
             except NameError:
                 cont = None
         if cont is None:
             print "Error: no such file or variable"
             return
             
         page(self.shell.pycolorize(cont),
              screen_lines=self.shell.rc.screen_length)
 
     def magic_cpaste(self, parameter_s=''):
         """Allows you to paste & execute a pre-formatted code block from clipboard
         
         You must terminate the block with '--' (two minus-signs) alone on the
         line. You can also provide your own sentinel with '%paste -s %%' ('%%' 
         is the new sentinel for this operation)
         
         The block is dedented prior to execution to enable execution of 
         method definitions. The executed block is also assigned to variable 
         named 'pasted_block' for later editing with '%edit pasted_block'.
         
         You can also pass a variable name as an argument, e.g. '%cpaste foo'.
         This assigns the pasted block to variable 'foo' as string, without 
         dedenting or executing it.
         
         Do not be alarmed by garbled output on Windows (it's a readline bug). 
         Just press enter and type -- (and press enter again) and the block 
         will be what was just pasted.
         
         IPython statements (magics, shell escapes) are not supported (yet).
         """
         opts,args = self.parse_options(parameter_s,'s:',mode='string')
         par = args.strip()
         sentinel = opts.get('s','--')
         
         from IPython import iplib
         lines = []
         print "Pasting code; enter '%s' alone on the line to stop." % sentinel
         while 1:
             l = iplib.raw_input_original(':')
             if l ==sentinel:
                 break
             lines.append(l)
         block = "\n".join(lines) + '\n'
         #print "block:\n",block
         if not par:
             b = textwrap.dedent(block)
             exec b in self.user_ns            
             self.user_ns['pasted_block'] = b
         else:
             self.user_ns[par] = block
             print "Block assigned to '%s'" % par
             
     def magic_quickref(self,arg):
         """ Show a quick reference sheet """
         import IPython.usage
         qr = IPython.usage.quick_reference + self.magic_magic('-brief')
         
         page(qr)
         
     def magic_upgrade(self,arg):
         """ Upgrade your IPython installation
         
         This will copy the config files that don't yet exist in your 
         ipython dir from the system config dir. Use this after upgrading 
         IPython if you don't wish to delete your .ipython dir.
 
         Call with -nolegacy to get rid of ipythonrc* files (recommended for
         new users)
 
         """
         ip = self.getapi()
         ipinstallation = path(IPython.__file__).dirname()
         upgrade_script = sys.executable + " " + ipinstallation / 'upgrade_dir.py'
         src_config = ipinstallation / 'UserConfig'
-        userdir = path(ip.options().ipythondir)
+        userdir = path(ip.options.ipythondir)
         cmd = upgrade_script + " " + src_config + " " + userdir
         print ">",cmd
         shell(cmd)
         if arg == '-nolegacy':
             legacy = userdir.files('ipythonrc*')
             print "Nuking legacy files:",legacy
             
             [p.remove() for p in legacy]
             suffix = (sys.platform == 'win32' and '.ini' or '')
             (userdir / ('ipythonrc' + suffix)).write_text('# Empty, see ipy_user_conf.py\n')
 
 
 # end Magic

IPython/UserConfig/ipy_profile_sh.py

@@ -1,85 +1,82 b''
-""" Shell mode for ipython
+"""Shell mode for IPython.
 
 Start ipython in shell mode by invoking "ipython -p sh"
 
 (the old version, "ipython -p pysh" still works but this is the more "modern" 
 shell mode and is recommended for users who don't care about pysh-mode
 compatibility)
-
-
 """
 
-
 from IPython import ipapi
 import os,textwrap
 
 # The import below effectively obsoletes your old-style ipythonrc[.ini],
 # so consider yourself warned!
 
-import ipy_sane_defaults
+import ipy_defaults
 
 def main():
     ip = ipapi.get()
-    o = ip.options()
+    o = ip.options
     # autocall to "full" mode (smart mode is default, I like full mode)
     
     o.autocall = 2
     
     # Jason Orendorff's path class is handy to have in user namespace
     # if you are doing shell-like stuff
     try:
         ip.ex("from path import path" )
     except ImportError:
         pass
     
     ip.ex('import os')
     ip.ex("def up(): os.chdir('..')")
         
     # Get pysh-like prompt for all profiles. 
     
     o.prompt_in1= '\C_LightBlue[\C_LightCyan\Y1\C_LightBlue]\C_Green|\#> '
     o.prompt_in2= '\C_Green|\C_LightGreen\D\C_Green> '
     o.prompt_out= '<\#> '
     
     from IPython import Release
 
     import sys
     # I like my banner minimal.
     o.banner = "Py %s IPy %s\n" % (sys.version.split('\n')[0],Release.version)
     
     # make 'd' an alias for ls -F
     
     ip.magic('alias d ls -F --color=auto')
     
     # Make available all system commands through "rehashing" immediately. 
     # You can comment these lines out to speed up startup on very slow 
     # machines, and to conserve a bit of memory. Note that pysh profile does this
     # automatically
     ip.IP.default_option('cd','-q')
     
 
     o.prompts_pad_left="1"
     # Remove all blank lines in between prompts, like a normal shell.
     o.separate_in="0"
     o.separate_out="0"
     o.separate_out2="0"
     
     # now alias all syscommands
     
-    db = ip.getdb()
+    db = ip.db
     
     syscmds = db.get("syscmdlist",[] )
     if not syscmds:
         print textwrap.dedent("""
         System command list not initialized, probably the first run...
         running %rehashx to refresh the command list. Run %rehashx
         again to refresh command list (after installing new software etc.)
         """)
         ip.magic('rehashx')
         syscmds = db.get("syscmdlist")
     for cmd in syscmds:
         #print "al",cmd
         noext, ext = os.path.splitext(cmd)
         ip.IP.alias_table[noext] = (0,cmd)
 
 main()

IPython/UserConfig/ipy_user_conf.py

@@ -1,31 +1,31 b''
 """ User configuration file for IPython
 
 This is a more flexible and safe way to configure ipython than *rc files
 (ipythonrc, ipythonrc-pysh etc.)
 
 This file is always imported on ipython startup. You can import the
 ipython extensions you need here (see IPython/Extensions directory).
 
 Feel free to edit this file to customize your ipython experience.
 
 Note that as such this file does nothing, for backwards compatibility.
 Consult e.g. file 'ipy_profile_sh.py' for an example of the things 
 you can do here.
 
 """
 
 # Most of your config files and extensions will probably start with this import
 
 import IPython.ipapi
 ip = IPython.ipapi.get()
 
 # You probably want to uncomment this if you did %upgrade -nolegacy
-# import ipy_sane_defaults    
+# import ipy_defaults    
 
 def main():
-    o = ip.options()
+    o = ip.options
     # An example on how to set options
     #o.autocall = 1
 
 main()
     

IPython/__init__.py

@@ -1,73 +1,73 b''
 # -*- coding: utf-8 -*-
 """
 IPython -- An enhanced Interactive Python
 
 One of Python's nicest features is its interactive interpreter. This allows
 very fast testing of ideas without the overhead of creating test files as is
 typical in most programming languages. However, the interpreter supplied with
 the standard Python distribution is fairly primitive (and IDLE isn't really
 much better).
 
 IPython tries to:
 
   i - provide an efficient environment for interactive work in Python
   programming. It tries to address what we see as shortcomings of the standard
   Python prompt, and adds many features to make interactive work much more
   efficient.
 
   ii - offer a flexible framework so that it can be used as the base
   environment for other projects and problems where Python can be the
   underlying language. Specifically scientific environments like Mathematica,
   IDL and Mathcad inspired its design, but similar ideas can be useful in many
   fields. Python is a fabulous language for implementing this kind of system
   (due to its dynamic and introspective features), and with suitable libraries
   entire systems could be built leveraging Python's power.
 
   iii - serve as an embeddable, ready to go interpreter for your own programs.
 
-IPython requires Python 2.2 or newer.
+IPython requires Python 2.3 or newer.
 
-$Id: __init__.py 1110 2006-01-30 20:43:30Z vivainio $"""
+$Id: __init__.py 1314 2006-05-19 18:24:14Z fperez $"""
 
 #*****************************************************************************
 #       Copyright (C) 2001-2004 Fernando Perez. <[e-mail]>
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #*****************************************************************************
 
 # Enforce proper version requirements
 import sys
 
 if sys.version[0:3] < '2.3':
     raise ImportError, 'Python Version 2.3 or above is required.'
 
 # Make it easy to import extensions - they are always directly on pythonpath.
 # Therefore, non-IPython modules can be added to Extensions directory
 
 import os
 sys.path.append(os.path.dirname(__file__) + "/Extensions")
         
 # Define what gets imported with a 'from IPython import *'
 __all__ = ['deep_reload','genutils','ipstruct','ultraTB','DPyGetOpt',
            'Itpl','hooks','ConfigLoader','OutputTrap','Release','Shell',
            'platutils','platutils_win32','platutils_posix','platutils_dummy',
            'ipapi','rlineimpl']
 
 # Load __all__ in IPython namespace so that a simple 'import IPython' gives
 # access to them via IPython.<name>
 glob,loc = globals(),locals()
 for name in __all__:
     __import__(name,glob,loc,[])
 
 # Release data
 from IPython import Release # do it explicitly so pydoc can see it - pydoc bug
 __author__   = '%s <%s>\n%s <%s>\n%s <%s>' % \
                ( Release.authors['Fernando'] + Release.authors['Janko'] + \
                  Release.authors['Nathan'] )
 __license__  = Release.license
 __version__  = Release.version
 __revision__ = Release.revision
 
 # Namespace cleanup
 del name,glob,loc

IPython/completer.py

@@ -1,570 +1,570 b''
 """Word completion for IPython.
 
 This module is a fork of the rlcompleter module in the Python standard
 library.  The original enhancements made to rlcompleter have been sent
 upstream and were accepted as of Python 2.3, but we need a lot more
 functionality specific to IPython, so this module will continue to live as an
 IPython-specific utility.
 
 ---------------------------------------------------------------------------
 Original rlcompleter documentation:
 
 This requires the latest extension to the readline module (the
 completes keywords, built-ins and globals in __main__; when completing
 NAME.NAME..., it evaluates (!) the expression up to the last dot and
 completes its attributes.
 
 It's very cool to do "import string" type "string.", hit the
 completion key (twice), and see the list of names defined by the
 string module!
 
 Tip: to use the tab key as the completion key, call
 
     readline.parse_and_bind("tab: complete")
 
 Notes:
 
 - Exceptions raised by the completer function are *ignored* (and
 generally cause the completion to fail).  This is a feature -- since
 readline sets the tty device in raw (or cbreak) mode, printing a
 traceback wouldn't work well without some complicated hoopla to save,
 reset and restore the tty state.
 
 - The evaluation of the NAME.NAME... form may cause arbitrary
 application defined code to be executed if an object with a
 __getattr__ hook is found.  Since it is the responsibility of the
 application (or the user) to enable this feature, I consider this an
 acceptable risk.  More complicated expressions (e.g. function calls or
 indexing operations) are *not* evaluated.
 
 - GNU readline is also used by the built-in functions input() and
 raw_input(), and thus these also benefit/suffer from the completer
 features.  Clearly an interactive application can benefit by
 specifying its own completer function and using raw_input() for all
 its input.
 
 - When the original stdin is not a tty device, GNU readline is never
 used, and this module (and the readline module) are silently inactive.
 
 """
 
 #*****************************************************************************
 #
 # Since this file is essentially a minimally modified copy of the rlcompleter
 # module which is part of the standard Python distribution, I assume that the
 # proper procedure is to maintain its copyright as belonging to the Python
 # Software Foundation (in addition to my own, for all new code).
 #
 #       Copyright (C) 2001 Python Software Foundation, www.python.org
 #       Copyright (C) 2001-2006 Fernando Perez. <[e-mail]>
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #
 #*****************************************************************************
 
 import __builtin__
 import __main__
 import glob
 import keyword
 import os
 import re
+import shlex
 import sys
 import IPython.rlineimpl as readline    
 
 import types
 
 # Python 2.4 offers sets as a builtin
 try:
     set([1,2])
 except NameError:
     from sets import Set as set
 
-
-from IPython.genutils import shlex_split,debugx
+from IPython.genutils import debugx
 
 __all__ = ['Completer','IPCompleter']
 
 def get_class_members(cls):
     ret = dir(cls)
     if hasattr(cls,'__bases__'):
         for base in cls.__bases__:
             ret.extend(get_class_members(base))
     return ret
 
 class Completer:
     def __init__(self,namespace=None,global_namespace=None):
         """Create a new completer for the command line.
 
         Completer([namespace,global_namespace]) -> completer instance.
 
         If unspecified, the default namespace where completions are performed
         is __main__ (technically, __main__.__dict__). Namespaces should be
         given as dictionaries.
 
         An optional second namespace can be given.  This allows the completer
         to handle cases where both the local and global scopes need to be
         distinguished.
 
         Completer instances should be used as the completion mechanism of
         readline via the set_completer() call:
 
         readline.set_completer(Completer(my_namespace).complete)
         """
 
         # some minimal strict typechecks.  For some core data structures, I
         # want actual basic python types, not just anything that looks like
         # one.  This is especially true for namespaces.
         for ns in (namespace,global_namespace):
             if ns is not None and type(ns) != types.DictType:
                 raise TypeError,'namespace must be a dictionary'
 
         # Don't bind to namespace quite yet, but flag whether the user wants a
         # specific namespace or to use __main__.__dict__. This will allow us
         # to bind to __main__.__dict__ at completion time, not now.
         if namespace is None:
             self.use_main_ns = 1
         else:
             self.use_main_ns = 0
             self.namespace = namespace
 
         # The global namespace, if given, can be bound directly
         if global_namespace is None:
             self.global_namespace = {}
         else:
             self.global_namespace = global_namespace
 
     def complete(self, text, state):
         """Return the next possible completion for 'text'.
 
         This is called successively with state == 0, 1, 2, ... until it
         returns None.  The completion should begin with 'text'.
 
         """
         if self.use_main_ns:
             self.namespace = __main__.__dict__
             
         if state == 0:
             if "." in text:
                 self.matches = self.attr_matches(text)
             else:
                 self.matches = self.global_matches(text)
         try:
             return self.matches[state]
         except IndexError:
             return None
 
     def global_matches(self, text):
         """Compute matches when text is a simple name.
 
         Return a list of all keywords, built-in functions and names currently
         defined in self.namespace or self.global_namespace that match.
 
         """
         matches = []
         match_append = matches.append
         n = len(text)
         for lst in [keyword.kwlist,
                     __builtin__.__dict__.keys(),
                     self.namespace.keys(),
                     self.global_namespace.keys()]:
             for word in lst:
                 if word[:n] == text and word != "__builtins__":
                     match_append(word)
         return matches
 
     def attr_matches(self, text):
         """Compute matches when text contains a dot.
 
         Assuming the text is of the form NAME.NAME....[NAME], and is
         evaluatable in self.namespace or self.global_namespace, it will be
         evaluated and its attributes (as revealed by dir()) are used as
         possible completions.  (For class instances, class members are are
         also considered.)
 
         WARNING: this can still invoke arbitrary C code, if an object
         with a __getattr__ hook is evaluated.
 
         """
         import re
 
         # Another option, seems to work great. Catches things like ''.<tab>
         m = re.match(r"(\S+(\.\w+)*)\.(\w*)$", text)
 
         if not m:
             return []
         
         expr, attr = m.group(1, 3)
         try:
             object = eval(expr, self.namespace)
         except:
             object = eval(expr, self.global_namespace)
 
         # Start building the attribute list via dir(), and then complete it
         # with a few extra special-purpose calls.
         words = dir(object)
 
         if hasattr(object,'__class__'):
             words.append('__class__')
             words.extend(get_class_members(object.__class__))
 
         # this is the 'dir' function for objects with Enthought's traits
         if hasattr(object, 'trait_names'):
             try:
                 words.extend(object.trait_names())
                 # eliminate possible duplicates, as some traits may also
                 # appear as normal attributes in the dir() call.
                 words = set(words)
             except TypeError:
                 # This will happen if `object` is a class and not an instance.
                 pass
 
         # filter out non-string attributes which may be stuffed by dir() calls
         # and poor coding in third-party modules
         words = [w for w in words
                  if isinstance(w, basestring) and w != "__builtins__"]
         # Build match list to return
         n = len(attr)
         return ["%s.%s" % (expr, w) for w in words if w[:n] == attr ]
 
 class IPCompleter(Completer):
     """Extension of the completer class with IPython-specific features"""
 
     def __init__(self,shell,namespace=None,global_namespace=None,
                  omit__names=0,alias_table=None):
         """IPCompleter() -> completer
 
         Return a completer object suitable for use by the readline library
         via readline.set_completer().
 
         Inputs:
 
         - shell: a pointer to the ipython shell itself.  This is needed
         because this completer knows about magic functions, and those can
         only be accessed via the ipython instance.
 
         - namespace: an optional dict where completions are performed.
 
         - global_namespace: secondary optional dict for completions, to
         handle cases (such as IPython embedded inside functions) where
         both Python scopes are visible.
 
         - The optional omit__names parameter sets the completer to omit the
         'magic' names (__magicname__) for python objects unless the text
         to be completed explicitly starts with one or more underscores.
 
         - If alias_table is supplied, it should be a dictionary of aliases
         to complete. """
 
         Completer.__init__(self,namespace,global_namespace)
         self.magic_prefix = shell.name+'.magic_'
         self.magic_escape = shell.ESC_MAGIC
         self.readline = readline
         delims = self.readline.get_completer_delims()
         delims = delims.replace(self.magic_escape,'')
         self.readline.set_completer_delims(delims)
         self.get_line_buffer = self.readline.get_line_buffer
         self.omit__names = omit__names
         self.merge_completions = shell.rc.readline_merge_completions
 
         if alias_table is None:
             alias_table = {}
         self.alias_table = alias_table
         # Regexp to split filenames with spaces in them
         self.space_name_re = re.compile(r'([^\\] )')
         # Hold a local ref. to glob.glob for speed
         self.glob = glob.glob
 
         # Determine if we are running on 'dumb' terminals, like (X)Emacs
         # buffers, to avoid completion problems.
         term = os.environ.get('TERM','xterm')
         self.dumb_terminal = term in ['dumb','emacs']
         
         # Special handling of backslashes needed in win32 platforms
         if sys.platform == "win32":
             self.clean_glob = self._clean_glob_win32
         else:
             self.clean_glob = self._clean_glob
         self.matchers = [self.python_matches,
                          self.file_matches,
                          self.alias_matches,
                          self.python_func_kw_matches]
 
     # Code contributed by Alex Schmolck, for ipython/emacs integration
     def all_completions(self, text):
         """Return all possible completions for the benefit of emacs."""
 
         completions = []
         comp_append = completions.append
         try:
             for i in xrange(sys.maxint):
                 res = self.complete(text, i)
 
                 if not res: break
 
                 comp_append(res)
         #XXX workaround for ``notDefined.<tab>``
         except NameError:
             pass
         return completions
     # /end Alex Schmolck code.
 
     def _clean_glob(self,text):
         return self.glob("%s*" % text)
 
     def _clean_glob_win32(self,text):
         return [f.replace("\\","/")
                 for f in self.glob("%s*" % text)]            
 
     def file_matches(self, text):
         """Match filneames, expanding ~USER type strings.
 
         Most of the seemingly convoluted logic in this completer is an
         attempt to handle filenames with spaces in them.  And yet it's not
         quite perfect, because Python's readline doesn't expose all of the
         GNU readline details needed for this to be done correctly.
 
         For a filename with a space in it, the printed completions will be
         only the parts after what's already been typed (instead of the
         full completions, as is normally done).  I don't think with the
         current (as of Python 2.3) Python readline it's possible to do
         better."""
 
         #print 'Completer->file_matches: <%s>' % text # dbg
 
         # chars that require escaping with backslash - i.e. chars
         # that readline treats incorrectly as delimiters, but we
         # don't want to treat as delimiters in filename matching
         # when escaped with backslash
 
         protectables = ' ()[]{}'
 
         def protect_filename(s):
             return "".join([(ch in protectables and '\\' + ch or ch)
                             for ch in s])
         
         lbuf = self.lbuf
         open_quotes = 0  # track strings with open quotes
         try:
-            lsplit = shlex_split(lbuf)[-1]
+            lsplit = shlex.split(lbuf)[-1]
         except ValueError:
             # typically an unmatched ", or backslash without escaped char.
             if lbuf.count('"')==1:
                 open_quotes = 1
                 lsplit = lbuf.split('"')[-1]
             elif lbuf.count("'")==1:
                 open_quotes = 1
                 lsplit = lbuf.split("'")[-1]
             else:
                 return None
         except IndexError:
             # tab pressed on empty line
             lsplit = ""
 
         if lsplit != protect_filename(lsplit):
             # if protectables are found, do matching on the whole escaped
             # name
             has_protectables = 1
             text0,text = text,lsplit
         else:
             has_protectables = 0
             text = os.path.expanduser(text)
 
         if text == "":
             return [protect_filename(f) for f in self.glob("*")]
 
         m0 = self.clean_glob(text.replace('\\',''))
         if has_protectables:
             # If we had protectables, we need to revert our changes to the
             # beginning of filename so that we don't double-write the part
             # of the filename we have so far
             len_lsplit = len(lsplit)
             matches = [text0 + protect_filename(f[len_lsplit:]) for f in m0]
         else:
             if open_quotes:
                 # if we have a string with an open quote, we don't need to
                 # protect the names at all (and we _shouldn't_, as it
                 # would cause bugs when the filesystem call is made).
                 matches = m0
             else:
                 matches = [protect_filename(f) for f in m0]
         if len(matches) == 1 and os.path.isdir(matches[0]):
             # Takes care of links to directories also.  Use '/'
             # explicitly, even under Windows, so that name completions
             # don't end up escaped.
             matches[0] += '/'
         return matches
 
     def alias_matches(self, text):
         """Match internal system aliases"""        
         #print 'Completer->alias_matches:',text,'lb',self.lbuf # dbg
         
         # if we are not in the first 'item', alias matching 
         # doesn't make sense
         if ' ' in self.lbuf:
             return []
         text = os.path.expanduser(text)
         aliases =  self.alias_table.keys()
         if text == "":
             return aliases
         else:
             return [alias for alias in aliases if alias.startswith(text)]
 
     def python_matches(self,text):
         """Match attributes or global python names"""
 
         #print 'Completer->python_matches, txt=<%s>' % text # dbg
         if "." in text:
             try:
                 matches = self.attr_matches(text)
                 if text.endswith('.') and self.omit__names:
                     if self.omit__names == 1:
                         # true if txt is _not_ a __ name, false otherwise:
                         no__name = (lambda txt:
                                     re.match(r'.*\.__.*?__',txt) is None)
                     else:
                         # true if txt is _not_ a _ name, false otherwise:
                         no__name = (lambda txt:
                                     re.match(r'.*\._.*?',txt) is None)
                     matches = filter(no__name, matches)
             except NameError:
                 # catches <undefined attributes>.<tab>
                 matches = []
         else:
             matches = self.global_matches(text)
             # this is so completion finds magics when automagic is on:
             if (matches == [] and 
                  not text.startswith(os.sep) and
                  not ' ' in self.lbuf):
                 matches = self.attr_matches(self.magic_prefix+text)
         return matches
 
     def _default_arguments(self, obj):
         """Return the list of default arguments of obj if it is callable,
         or empty list otherwise."""
 
         if not (inspect.isfunction(obj) or inspect.ismethod(obj)):
             # for classes, check for __init__,__new__
             if inspect.isclass(obj):
                 obj = (getattr(obj,'__init__',None) or
                        getattr(obj,'__new__',None))
             # for all others, check if they are __call__able
             elif hasattr(obj, '__call__'):
                 obj = obj.__call__
             # XXX: is there a way to handle the builtins ?
         try:
             args,_,_1,defaults = inspect.getargspec(obj)
             if defaults:
                 return args[-len(defaults):]
         except TypeError: pass
         return []
 
     def python_func_kw_matches(self,text):
         """Match named parameters (kwargs) of the last open function"""
 
         if "." in text: # a parameter cannot be dotted
             return []
         try: regexp = self.__funcParamsRegex
         except AttributeError:
             regexp = self.__funcParamsRegex = re.compile(r'''
                 '.*?' |    # single quoted strings or
                 ".*?" |    # double quoted strings or
                 \w+   |    # identifier
                 \S         # other characters
                 ''', re.VERBOSE | re.DOTALL)
         # 1. find the nearest identifier that comes before an unclosed
         # parenthesis e.g. for "foo (1+bar(x), pa", the candidate is "foo"
         tokens = regexp.findall(self.get_line_buffer())
         tokens.reverse()
         iterTokens = iter(tokens); openPar = 0
         for token in iterTokens:
             if token == ')':
                 openPar -= 1
             elif token == '(':
                 openPar += 1
                 if openPar > 0:
                     # found the last unclosed parenthesis
                     break
         else:
             return []
         # 2. Concatenate dotted names ("foo.bar" for "foo.bar(x, pa" )
         ids = []
         isId = re.compile(r'\w+$').match
         while True:
             try:
                 ids.append(iterTokens.next())
                 if not isId(ids[-1]):
                     ids.pop(); break
                 if not iterTokens.next() == '.':
                     break
             except StopIteration:
                 break
         # lookup the candidate callable matches either using global_matches
         # or attr_matches for dotted names
         if len(ids) == 1:
             callableMatches = self.global_matches(ids[0])
         else:
             callableMatches = self.attr_matches('.'.join(ids[::-1]))
         argMatches = []
         for callableMatch in callableMatches:
             try: namedArgs = self._default_arguments(eval(callableMatch,
                                                          self.namespace))
             except: continue
             for namedArg in namedArgs:
                 if namedArg.startswith(text):
                     argMatches.append("%s=" %namedArg)
         return argMatches
 
     def complete(self, text, state):
         """Return the next possible completion for 'text'.
 
         This is called successively with state == 0, 1, 2, ... until it
         returns None.  The completion should begin with 'text'.  """
 
         #print '\n*** COMPLETE: <%s> (%s)' % (text,state)  # dbg
 
         # if there is only a tab on a line with only whitespace, instead
         # of the mostly useless 'do you want to see all million
         # completions' message, just do the right thing and give the user
         # his tab!  Incidentally, this enables pasting of tabbed text from
         # an editor (as long as autoindent is off).
 
         # don't apply this on 'dumb' terminals, such as emacs buffers, so we
         # don't interfere with their own tab-completion mechanism.
         self.lbuf = self.get_line_buffer()[:self.readline.get_endidx()]
         if not (self.dumb_terminal or self.get_line_buffer().strip()):
             self.readline.insert_text('\t')
             return None
 
         magic_escape = self.magic_escape
         magic_prefix = self.magic_prefix
 
         try:
             if text.startswith(magic_escape):
                 text = text.replace(magic_escape,magic_prefix)
             elif text.startswith('~'):
                 text = os.path.expanduser(text)
             if state == 0:
                 # Extend the list of completions with the results of each
                 # matcher, so we return results to the user from all
                 # namespaces.
                 if self.merge_completions:
                     self.matches = []
                     for matcher in self.matchers:
                         self.matches.extend(matcher(text))
                 else:
                     for matcher in self.matchers:
                         self.matches = matcher(text)
                         if self.matches:
                             break
 
             try:
                 return self.matches[state].replace(magic_prefix,magic_escape)
             except IndexError:
                 return None
         except:
             #from IPython.ultraTB import AutoFormattedTB; # dbg
             #tb=AutoFormattedTB('Verbose');tb() #dbg
 
             # If completion fails, don't annoy the user.
             return None

IPython/demo.py

@@ -1,418 +1,419 b''
 """Module for interactive demos using IPython.
 
 This module implements a few classes for running Python scripts interactively
 in IPython for demonstrations.  With very simple markup (a few tags in
 comments), you can control points where the script stops executing and returns
 control to IPython.
 
 The classes are (see their docstrings for further details):
 
  - Demo: pure python demos
 
  - IPythonDemo: demos with input to be processed by IPython as if it had been
  typed interactively (so magics work, as well as any other special syntax you
  may have added via input prefilters).
 
  - LineDemo: single-line version of the Demo class.  These demos are executed
  one line at a time, and require no markup.
 
  - IPythonLineDemo: IPython version of the LineDemo class (the demo is
  executed a line at a time, but processed via IPython).
 
 
 The file is run in its own empty namespace (though you can pass it a string of
 arguments as if in a command line environment, and it will see those as
 sys.argv).  But at each stop, the global IPython namespace is updated with the
 current internal demo namespace, so you can work interactively with the data
 accumulated so far.
 
 By default, each block of code is printed (with syntax highlighting) before
 executing it and you have to confirm execution.  This is intended to show the
 code to an audience first so you can discuss it, and only proceed with
 execution once you agree.  There are a few tags which allow you to modify this
 behavior.
 
 The supported tags are:
 
 # <demo> --- stop ---
 
   Defines block boundaries, the points where IPython stops execution of the
   file and returns to the interactive prompt.
 
 # <demo> silent
 
   Make a block execute silently (and hence automatically).  Typically used in
   cases where you have some boilerplate or initialization code which you need
   executed but do not want to be seen in the demo.
   
 # <demo> auto
 
   Make a block execute automatically, but still being printed.  Useful for
   simple code which does not warrant discussion, since it avoids the extra
   manual confirmation.
 
 # <demo> auto_all
 
   This tag can _only_ be in the first block, and if given it overrides the
   individual auto tags to make the whole demo fully automatic (no block asks
   for confirmation).  It can also be given at creation time (or the attribute
   set later) to override what's in the file.
 
 While _any_ python file can be run as a Demo instance, if there are no stop
 tags the whole file will run in a single block (no different that calling
 first %pycat and then %run).  The minimal markup to make this useful is to
 place a set of stop tags; the other tags are only there to let you fine-tune
 the execution.
 
 This is probably best explained with the simple example file below.  You can
 copy this into a file named ex_demo.py, and try running it via:
 
 from IPython.demo import Demo
 d = Demo('ex_demo.py')
 d()  <--- Call the d object (omit the parens if you have autocall set to 2).
 
 Each time you call the demo object, it runs the next block.  The demo object
 has a few useful methods for navigation, like again(), edit(), jump(), seek()
 and back().  It can be reset for a new run via reset() or reloaded from disk
 (in case you've edited the source) via reload().  See their docstrings below.
 
 #################### EXAMPLE DEMO <ex_demo.py> ###############################
 '''A simple interactive demo to illustrate the use of IPython's Demo class.'''
 
 print 'Hello, welcome to an interactive IPython demo.'
 
 # The mark below defines a block boundary, which is a point where IPython will
 # stop execution and return to the interactive prompt.
 # Note that in actual interactive execution, 
 # <demo> --- stop ---
 
 x = 1
 y = 2
 
 # <demo> --- stop ---
 
 # the mark below makes this block as silent
 # <demo> silent
 
 print 'This is a silent block, which gets executed but not printed.'
 
 # <demo> --- stop ---
 # <demo> auto
 print 'This is an automatic block.'
 print 'It is executed without asking for confirmation, but printed.'
 z = x+y
 
 print 'z=',x
 
 # <demo> --- stop ---
 # This is just another normal block.
 print 'z is now:', z
 
 print 'bye!'
 ################### END EXAMPLE DEMO <ex_demo.py> ############################
 """
 #*****************************************************************************
 #     Copyright (C) 2005-2006 Fernando Perez. <[e-mail]>
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #
 #*****************************************************************************
 
 import exceptions
 import os
 import re
+import shlex
 import sys
 
 from IPython.PyColorize import Parser
-from IPython.genutils import marquee, shlex_split, file_read, file_readlines
+from IPython.genutils import marquee, file_read, file_readlines
 
 __all__ = ['Demo','IPythonDemo','LineDemo','IPythonLineDemo','DemoError']
 
 class DemoError(exceptions.Exception): pass
 
 def re_mark(mark):
     return re.compile(r'^\s*#\s+<demo>\s+%s\s*$' % mark,re.MULTILINE)
 
 class Demo:
 
     re_stop     = re_mark('---\s?stop\s?---')
     re_silent   = re_mark('silent')
     re_auto     = re_mark('auto')
     re_auto_all = re_mark('auto_all')
 
     def __init__(self,fname,arg_str='',auto_all=None):
         """Make a new demo object.  To run the demo, simply call the object.
 
         See the module docstring for full details and an example (you can use
         IPython.Demo? in IPython to see it).
 
         Inputs:
         
           - fname = filename.
 
         Optional inputs:
 
           - arg_str(''): a string of arguments, internally converted to a list
           just like sys.argv, so the demo script can see a similar
           environment.
 
           - auto_all(None): global flag to run all blocks automatically without
           confirmation.  This attribute overrides the block-level tags and
           applies to the whole demo.  It is an attribute of the object, and
           can be changed at runtime simply by reassigning it to a boolean
           value.
           """
         
         self.fname    = fname
-        self.sys_argv = [fname] + shlex_split(arg_str)
+        self.sys_argv = [fname] + shlex.split(arg_str)
         self.auto_all = auto_all
         
         # get a few things from ipython.  While it's a bit ugly design-wise,
         # it ensures that things like color scheme and the like are always in
         # sync with the ipython mode being used.  This class is only meant to
         # be used inside ipython anyways,  so it's OK.
         self.ip_ns       = __IPYTHON__.user_ns
         self.ip_colorize = __IPYTHON__.pycolorize
         self.ip_showtb   = __IPYTHON__.showtraceback
         self.ip_runlines = __IPYTHON__.runlines
         self.shell       = __IPYTHON__
 
         # load user data and initialize data structures
         self.reload()
 
     def reload(self):
         """Reload source from disk and initialize state."""
         # read data and parse into blocks
         self.src     = file_read(self.fname)
         src_b        = [b.strip() for b in self.re_stop.split(self.src) if b]
         self._silent = [bool(self.re_silent.findall(b)) for b in src_b]
         self._auto   = [bool(self.re_auto.findall(b)) for b in src_b]
 
         # if auto_all is not given (def. None), we read it from the file
         if self.auto_all is None:
             self.auto_all = bool(self.re_auto_all.findall(src_b[0]))
         else:
             self.auto_all = bool(self.auto_all)
 
         # Clean the sources from all markup so it doesn't get displayed when
         # running the demo
         src_blocks = []
         auto_strip = lambda s: self.re_auto.sub('',s)
         for i,b in enumerate(src_b):
             if self._auto[i]:
                 src_blocks.append(auto_strip(b))
             else:
                 src_blocks.append(b)
         # remove the auto_all marker
         src_blocks[0] = self.re_auto_all.sub('',src_blocks[0])
 
         self.nblocks = len(src_blocks)
         self.src_blocks = src_blocks
 
         # also build syntax-highlighted source
         self.src_blocks_colored = map(self.ip_colorize,self.src_blocks)
 
         # ensure clean namespace and seek offset
         self.reset()
 
     def reset(self):
         """Reset the namespace and seek pointer to restart the demo"""
         self.user_ns     = {}
         self.finished    = False
         self.block_index = 0
 
     def _validate_index(self,index):
         if index<0 or index>=self.nblocks:
             raise ValueError('invalid block index %s' % index)
 
     def _get_index(self,index):
         """Get the current block index, validating and checking status.
 
         Returns None if the demo is finished"""
         
         if index is None:
             if self.finished:
                 print 'Demo finished.  Use reset() if you want to rerun it.'
                 return None
             index = self.block_index
         else:
             self._validate_index(index)
         return index
 
     def seek(self,index):
         """Move the current seek pointer to the given block"""
         self._validate_index(index)
         self.block_index = index
         self.finished = False
 
     def back(self,num=1):
         """Move the seek pointer back num blocks (default is 1)."""
         self.seek(self.block_index-num)
 
     def jump(self,num):
         """Jump a given number of blocks relative to the current one."""
         self.seek(self.block_index+num)
 
     def again(self):
         """Move the seek pointer back one block and re-execute."""
         self.back(1)
         self()
 
     def edit(self,index=None):
         """Edit a block.
 
         If no number is given, use the last block executed.
 
         This edits the in-memory copy of the demo, it does NOT modify the
         original source file.  If you want to do that, simply open the file in
         an editor and use reload() when you make changes to the file.  This
         method is meant to let you change a block during a demonstration for
         explanatory purposes, without damaging your original script."""
 
         index = self._get_index(index)
         if index is None:
             return
         # decrease the index by one (unless we're at the very beginning), so
         # that the default demo.edit() call opens up the sblock we've last run
         if index>0:
             index -= 1
             
         filename = self.shell.mktempfile(self.src_blocks[index])
         self.shell.hooks.editor(filename,1)
         new_block = file_read(filename)
         # update the source and colored block
         self.src_blocks[index] = new_block
         self.src_blocks_colored[index] = self.ip_colorize(new_block)
         self.block_index = index
         # call to run with the newly edited index
         self()
         
     def show(self,index=None):
         """Show a single block on screen"""
 
         index = self._get_index(index)
         if index is None:
             return
 
         print marquee('<%s> block # %s (%s remaining)' %
                       (self.fname,index,self.nblocks-index-1))
         print self.src_blocks_colored[index],
         sys.stdout.flush()
 
     def show_all(self):
         """Show entire demo on screen, block by block"""
 
         fname = self.fname
         nblocks = self.nblocks
         silent = self._silent
         for index,block in enumerate(self.src_blocks_colored):
             if silent[index]:
                 print marquee('<%s> SILENT block # %s (%s remaining)' %
                               (fname,index,nblocks-index-1))
             else:
                 print marquee('<%s> block # %s (%s remaining)' %
                               (fname,index,nblocks-index-1))
             print block,
         sys.stdout.flush()
 
     def runlines(self,source):
         """Execute a string with one or more lines of code"""
 
         exec source in self.user_ns
         
     def __call__(self,index=None):
         """run a block of the demo.
 
         If index is given, it should be an integer >=1 and <= nblocks.  This
         means that the calling convention is one off from typical Python
         lists.  The reason for the inconsistency is that the demo always
         prints 'Block n/N, and N is the total, so it would be very odd to use
         zero-indexing here."""
 
         index = self._get_index(index)
         if index is None:
             return
         try:
             next_block = self.src_blocks[index]
             self.block_index += 1
             if self._silent[index]:
                 print marquee('Executing silent block # %s (%s remaining)' %
                               (index,self.nblocks-index-1))
             else:
                 self.show(index)
                 if self.auto_all or self._auto[index]:
                     print marquee('output')
                 else:
                     print marquee('Press <q> to quit, <Enter> to execute...'),
                     ans = raw_input().strip()
                     if ans:
                         print marquee('Block NOT executed')
                         return
             try:
                 save_argv = sys.argv
                 sys.argv = self.sys_argv
                 self.runlines(next_block)
             finally:
                 sys.argv = save_argv
             
         except:
             self.ip_showtb(filename=self.fname)
         else:
             self.ip_ns.update(self.user_ns)
 
         if self.block_index == self.nblocks:
             print
             print marquee(' END OF DEMO ')
             print marquee('Use reset() if you want to rerun it.')
             self.finished = True
 
 class IPythonDemo(Demo):
     """Class for interactive demos with IPython's input processing applied.
 
     This subclasses Demo, but instead of executing each block by the Python
     interpreter (via exec), it actually calls IPython on it, so that any input
     filters which may be in place are applied to the input block.
 
     If you have an interactive environment which exposes special input
     processing, you can use this class instead to write demo scripts which
     operate exactly as if you had typed them interactively.  The default Demo
     class requires the input to be valid, pure Python code.
     """
 
     def runlines(self,source):
         """Execute a string with one or more lines of code"""
 
         self.runlines(source)
         
 class LineDemo(Demo):
     """Demo where each line is executed as a separate block.
 
     The input script should be valid Python code.
 
     This class doesn't require any markup at all, and it's meant for simple
     scripts (with no nesting or any kind of indentation) which consist of
     multiple lines of input to be executed, one at a time, as if they had been
     typed in the interactive prompt."""
     
     def reload(self):
         """Reload source from disk and initialize state."""
         # read data and parse into blocks
         src_b           = [l for l in file_readlines(self.fname) if l.strip()]
         nblocks         = len(src_b)
         self.src        = os.linesep.join(file_readlines(self.fname))
         self._silent    = [False]*nblocks
         self._auto      = [True]*nblocks
         self.auto_all   = True
         self.nblocks    = nblocks
         self.src_blocks = src_b
 
         # also build syntax-highlighted source
         self.src_blocks_colored = map(self.ip_colorize,self.src_blocks)
 
         # ensure clean namespace and seek offset
         self.reset()
 
 class IPythonLineDemo(IPythonDemo,LineDemo):
     """Variant of the LineDemo class whose input is processed by IPython."""
     pass

IPython/genutils.py

@@ -1,1776 +1,1703 b''
 # -*- coding: utf-8 -*-
 """
 General purpose utilities.
 
 This is a grab-bag of stuff I find useful in most programs I write. Some of
 these things are also convenient when working at the command line.
 
-$Id: genutils.py 1217 2006-03-16 21:49:01Z fperez $"""
+$Id: genutils.py 1314 2006-05-19 18:24:14Z fperez $"""
 
 #*****************************************************************************
 #       Copyright (C) 2001-2006 Fernando Perez. <[e-mail]>
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #*****************************************************************************
 
-from __future__ import generators # 2.2 compatibility
-
 from IPython import Release
 __author__  = '%s <%s>' % Release.authors['Fernando']
 __license__ = Release.license
 
 #****************************************************************************
 # required modules from the Python standard library
 import __main__
 import commands
 import os
 import re
-import shlex
 import shutil
 import sys
 import tempfile
 import time
 import types
 
 # Other IPython utilities
 from IPython.Itpl import Itpl,itpl,printpl
 from IPython import DPyGetOpt
 from path import path
 if os.name == "nt":
     from IPython.winconsole import get_console_size
 
-# Build objects which appeared in Python 2.3 for 2.2, to make ipython
-# 2.2-friendly
-try:
-    basestring
-except NameError:
-    import types
-    basestring = (types.StringType, types.UnicodeType)
-    True = 1==1
-    False = 1==0
-
-    def enumerate(obj):
-        i = -1
-        for item in obj:
-            i += 1
-            yield i, item
-
-    # add these to the builtin namespace, so that all modules find them
-    import __builtin__
-    __builtin__.basestring = basestring
-    __builtin__.True = True
-    __builtin__.False = False
-    __builtin__.enumerate = enumerate
-
-# Try to use shlex.split for converting an input string into a sys.argv-type
-# list.  This appeared in Python 2.3, so here's a quick backport for 2.2.
-try:
-    shlex_split = shlex.split
-except AttributeError:
-    _quotesre = re.compile(r'[\'"](.*)[\'"]')
-    _wordchars = ('abcdfeghijklmnopqrstuvwxyz'
-                  'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_-.~*?'
-                  'ßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþÿ'
-                  '�����ÅÆÇ�ÉÊ�Ì�Î��ÑÒÓÔÕÖ�ÙÚ�Ü�Þ%s'
-                  % os.sep)
-    
-    def shlex_split(s):
-        """Simplified backport to Python 2.2 of shlex.split().
-
-        This is a quick and dirty hack, since the shlex module under 2.2 lacks
-        several of the features needed to really match the functionality of
-        shlex.split() in 2.3."""
-
-        lex = shlex.shlex(StringIO(s))
-        # Try to get options, extensions and path separators as characters
-        lex.wordchars = _wordchars
-        lex.commenters = ''
-        # Make a list out of the lexer by hand, since in 2.2 it's not an
-        # iterator.
-        lout = []
-        while 1:
-            token = lex.get_token()
-            if token == '':
-                break
-            # Try to handle quoted tokens correctly
-            quotes = _quotesre.match(token)
-            if quotes:
-                token = quotes.group(1)
-            lout.append(token)
-        return lout
-
 #****************************************************************************
 # Exceptions
 class Error(Exception):
     """Base class for exceptions in this module."""
     pass
 
 #----------------------------------------------------------------------------
 class IOStream:
     def __init__(self,stream,fallback):
         if not hasattr(stream,'write') or not hasattr(stream,'flush'):
             stream = fallback
         self.stream = stream
         self._swrite = stream.write
         self.flush = stream.flush
 
     def write(self,data):
         try:
             self._swrite(data)
         except:
             try:
                 # print handles some unicode issues which may trip a plain
                 # write() call.  Attempt to emulate write() by using a
                 # trailing comma
                 print >> self.stream, data,
             except:
                 # if we get here, something is seriously broken.
                 print >> sys.stderr, \
                       'ERROR - failed to write data to stream:', self.stream
         
 class IOTerm:
     """ Term holds the file or file-like objects for handling I/O operations.
 
     These are normally just sys.stdin, sys.stdout and sys.stderr but for
     Windows they can can replaced to allow editing the strings before they are
     displayed."""
 
     # In the future, having IPython channel all its I/O operations through
     # this class will make it easier to embed it into other environments which
     # are not a normal terminal (such as a GUI-based shell)
     def __init__(self,cin=None,cout=None,cerr=None):
         self.cin  = IOStream(cin,sys.stdin)
         self.cout = IOStream(cout,sys.stdout)
         self.cerr = IOStream(cerr,sys.stderr)
         
 # Global variable to be used for all I/O
 Term = IOTerm()
 
 import IPython.rlineimpl as readline
 # Remake Term to use the readline i/o facilities
 if sys.platform == 'win32' and readline.have_readline:
     
     Term = IOTerm(cout=readline._outputfile,cerr=readline._outputfile)
     
 
 #****************************************************************************
 # Generic warning/error printer, used by everything else
 def warn(msg,level=2,exit_val=1):
     """Standard warning printer. Gives formatting consistency.
 
     Output is sent to Term.cerr (sys.stderr by default).
     
     Options:
     
     -level(2): allows finer control:
       0 -> Do nothing, dummy function.
       1 -> Print message.
       2 -> Print 'WARNING:' + message. (Default level).
       3 -> Print 'ERROR:' + message.
       4 -> Print 'FATAL ERROR:' + message and trigger a sys.exit(exit_val).
 
     -exit_val (1): exit value returned by sys.exit() for a level 4
     warning. Ignored for all other levels."""
     
     if level>0:
         header = ['','','WARNING: ','ERROR: ','FATAL ERROR: ']
         print >> Term.cerr, '%s%s' % (header[level],msg)
         if level == 4:
             print >> Term.cerr,'Exiting.\n'
             sys.exit(exit_val)
 
 def info(msg):
     """Equivalent to warn(msg,level=1)."""
 
     warn(msg,level=1)
 
 def error(msg):
     """Equivalent to warn(msg,level=3)."""
 
     warn(msg,level=3)
 
 def fatal(msg,exit_val=1):
     """Equivalent to warn(msg,exit_val=exit_val,level=4)."""
 
     warn(msg,exit_val=exit_val,level=4)
 
 #---------------------------------------------------------------------------
 # Debugging routines
 # 
 def debugx(expr,pre_msg=''):
     """Print the value of an expression from the caller's frame.
     
     Takes an expression, evaluates it in the caller's frame and prints both
     the given expression and the resulting value (as well as a debug mark
     indicating the name of the calling function.  The input must be of a form
     suitable for eval().
 
     An optional message can be passed, which will be prepended to the printed
     expr->value pair."""
     
     cf = sys._getframe(1)
     print '[DBG:%s] %s%s -> %r' % (cf.f_code.co_name,pre_msg,expr,
                                    eval(expr,cf.f_globals,cf.f_locals))
 
 # deactivate it by uncommenting the following line, which makes it a no-op
 #def debugx(expr,pre_msg=''): pass
 
 #----------------------------------------------------------------------------
 StringTypes = types.StringTypes
 
 # Basic timing functionality
 
 # If possible (Unix), use the resource module instead of time.clock()
 try:
     import resource
     def clock():
         """clock() -> floating point number
 
         Return the CPU time in seconds (user time only, system time is
         ignored) since the start of the process.  This is done via a call to
         resource.getrusage, so it avoids the wraparound problems in
         time.clock()."""
         
         return resource.getrusage(resource.RUSAGE_SELF)[0]
     
     def clock2():
         """clock2() -> (t_user,t_system)
 
         Similar to clock(), but return a tuple of user/system times."""
         return resource.getrusage(resource.RUSAGE_SELF)[:2]
 
 except ImportError:
     clock = time.clock
     def clock2():
         """Under windows, system CPU time can't be measured.
 
         This just returns clock() and zero."""
         return time.clock(),0.0
 
 def timings_out(reps,func,*args,**kw):
     """timings_out(reps,func,*args,**kw) -> (t_total,t_per_call,output)
 
     Execute a function reps times, return a tuple with the elapsed total
     CPU time in seconds, the time per call and the function's output.
 
     Under Unix, the return value is the sum of user+system time consumed by
     the process, computed via the resource module.  This prevents problems
     related to the wraparound effect which the time.clock() function has.
     
     Under Windows the return value is in wall clock seconds. See the
     documentation for the time module for more details."""
 
     reps = int(reps)
     assert reps >=1, 'reps must be >= 1'
     if reps==1:
         start = clock()
         out = func(*args,**kw)
         tot_time = clock()-start
     else:
         rng = xrange(reps-1) # the last time is executed separately to store output
         start = clock()
         for dummy in rng: func(*args,**kw)
         out = func(*args,**kw)  # one last time
         tot_time = clock()-start
     av_time = tot_time / reps
     return tot_time,av_time,out
 
 def timings(reps,func,*args,**kw):
     """timings(reps,func,*args,**kw) -> (t_total,t_per_call)
 
     Execute a function reps times, return a tuple with the elapsed total CPU
     time in seconds and the time per call. These are just the first two values
     in timings_out()."""
 
     return timings_out(reps,func,*args,**kw)[0:2]
 
 def timing(func,*args,**kw):
     """timing(func,*args,**kw) -> t_total
 
     Execute a function once, return the elapsed total CPU time in
     seconds. This is just the first value in timings_out()."""
 
     return timings_out(1,func,*args,**kw)[0]
 
 #****************************************************************************
 # file and system
 
 def system(cmd,verbose=0,debug=0,header=''):
     """Execute a system command, return its exit status.
 
     Options:
 
     - verbose (0): print the command to be executed.
     
     - debug (0): only print, do not actually execute.
 
     - header (''): Header to print on screen prior to the executed command (it
     is only prepended to the command, no newlines are added).
 
     Note: a stateful version of this function is available through the
     SystemExec class."""
 
     stat = 0
     if verbose or debug: print header+cmd
     sys.stdout.flush()
     if not debug: stat = os.system(cmd)
     return stat
 
 # This function is used by ipython in a lot of places to make system calls.
 # We need it to be slightly different under win32, due to the vagaries of
 # 'network shares'.  A win32 override is below.
 
 def shell(cmd,verbose=0,debug=0,header=''):
     """Execute a command in the system shell, always return None.
 
     Options:
 
     - verbose (0): print the command to be executed.
     
     - debug (0): only print, do not actually execute.
 
     - header (''): Header to print on screen prior to the executed command (it
     is only prepended to the command, no newlines are added).
 
     Note: this is similar to genutils.system(), but it returns None so it can
     be conveniently used in interactive loops without getting the return value
     (typically 0) printed many times."""
 
     stat = 0
     if verbose or debug: print header+cmd
     # flush stdout so we don't mangle python's buffering
     sys.stdout.flush()
     if not debug:
         os.system(cmd)
 
 # override shell() for win32 to deal with network shares
 if os.name in ('nt','dos'):
 
     shell_ori = shell
 
     def shell(cmd,verbose=0,debug=0,header=''):
         if os.getcwd().startswith(r"\\"):
             path = os.getcwd()
             # change to c drive (cannot be on UNC-share when issuing os.system,
             # as cmd.exe cannot handle UNC addresses)
             os.chdir("c:")
             # issue pushd to the UNC-share and then run the command
             try:
                 shell_ori('"pushd %s&&"'%path+cmd,verbose,debug,header)
             finally:
                 os.chdir(path)
         else:
             shell_ori(cmd,verbose,debug,header)
 
     shell.__doc__ = shell_ori.__doc__
 
 def getoutput(cmd,verbose=0,debug=0,header='',split=0):
     """Dummy substitute for perl's backquotes.
 
     Executes a command and returns the output.
 
     Accepts the same arguments as system(), plus:
 
     - split(0): if true, the output is returned as a list split on newlines.
 
     Note: a stateful version of this function is available through the
     SystemExec class.
     
     This is pretty much deprecated and rarely used, 
     genutils.getoutputerror may be what you need.
     
     """
 
     if verbose or debug: print header+cmd
     if not debug:
         output = os.popen(cmd).read()
         # stipping last \n is here for backwards compat.
         if output.endswith('\n'):
             output = output[:-1]
         if split:
             return output.split('\n')
         else:
             return output
 
 def getoutputerror(cmd,verbose=0,debug=0,header='',split=0):
     """Return (standard output,standard error) of executing cmd in a shell.
 
     Accepts the same arguments as system(), plus:
 
     - split(0): if true, each of stdout/err is returned as a list split on
     newlines.
 
     Note: a stateful version of this function is available through the
     SystemExec class."""
 
     if verbose or debug: print header+cmd
     if not cmd:
         if split:
             return [],[]
         else:
             return '',''
     if not debug:
         pin,pout,perr = os.popen3(cmd)
         tout = pout.read().rstrip()
         terr = perr.read().rstrip()
         pin.close()
         pout.close()
         perr.close()
         if split:
             return tout.split('\n'),terr.split('\n')
         else:
             return tout,terr
 
 # for compatibility with older naming conventions
 xsys = system
 bq = getoutput
 
 class SystemExec:
     """Access the system and getoutput functions through a stateful interface.
 
     Note: here we refer to the system and getoutput functions from this
     library, not the ones from the standard python library.
     
     This class offers the system and getoutput functions as methods, but the
     verbose, debug and header parameters can be set for the instance (at
     creation time or later) so that they don't need to be specified on each
     call.
 
     For efficiency reasons, there's no way to override the parameters on a
     per-call basis other than by setting instance attributes. If you need
     local overrides, it's best to directly call system() or getoutput().
 
     The following names are provided as alternate options:
      - xsys: alias to system
      - bq: alias to getoutput
 
     An instance can then be created as:
      >>> sysexec = SystemExec(verbose=1,debug=0,header='Calling: ')
 
     And used as:
      >>> sysexec.xsys('pwd')
      >>> dirlist = sysexec.bq('ls -l')
     """
     
     def __init__(self,verbose=0,debug=0,header='',split=0):
         """Specify the instance's values for verbose, debug and header."""
         setattr_list(self,'verbose debug header split')
 
     def system(self,cmd):
         """Stateful interface to system(), with the same keyword parameters."""
 
         system(cmd,self.verbose,self.debug,self.header)
 
     def shell(self,cmd):
         """Stateful interface to shell(), with the same keyword parameters."""
 
         shell(cmd,self.verbose,self.debug,self.header)
 
     xsys = system  # alias
 
     def getoutput(self,cmd):
         """Stateful interface to getoutput()."""
 
         return getoutput(cmd,self.verbose,self.debug,self.header,self.split)
 
     def getoutputerror(self,cmd):
         """Stateful interface to getoutputerror()."""
 
         return getoutputerror(cmd,self.verbose,self.debug,self.header,self.split)
 
     bq = getoutput  # alias
 
 #-----------------------------------------------------------------------------
 def mutex_opts(dict,ex_op):
     """Check for presence of mutually exclusive keys in a dict.
 
     Call: mutex_opts(dict,[[op1a,op1b],[op2a,op2b]...]"""
     for op1,op2 in ex_op:
         if op1 in dict and op2 in dict:
             raise ValueError,'\n*** ERROR in Arguments *** '\
                   'Options '+op1+' and '+op2+' are mutually exclusive.'
 
 #-----------------------------------------------------------------------------
 def get_py_filename(name):
     """Return a valid python filename in the current directory.
 
     If the given name is not a file, it adds '.py' and searches again.
     Raises IOError with an informative message if the file isn't found."""
 
     name = os.path.expanduser(name)
     if not os.path.isfile(name) and not name.endswith('.py'):
         name += '.py'
     if os.path.isfile(name):
         return name
     else:
         raise IOError,'File `%s` not found.' % name
 
 #-----------------------------------------------------------------------------
 def filefind(fname,alt_dirs = None):
     """Return the given filename either in the current directory, if it
     exists, or in a specified list of directories.
 
     ~ expansion is done on all file and directory names.
 
     Upon an unsuccessful search, raise an IOError exception."""
 
     if alt_dirs is None:
         try:
             alt_dirs = get_home_dir()
         except HomeDirError:
             alt_dirs = os.getcwd()
     search = [fname] + list_strings(alt_dirs)
     search = map(os.path.expanduser,search)
     #print 'search list for',fname,'list:',search  # dbg
     fname = search[0]
     if os.path.isfile(fname):
         return fname
     for direc in search[1:]:
         testname = os.path.join(direc,fname)
         #print 'testname',testname  # dbg
         if os.path.isfile(testname):
             return testname
     raise IOError,'File' + `fname` + \
           ' not found in current or supplied directories:' + `alt_dirs`
 
 #----------------------------------------------------------------------------
 def file_read(filename):
     """Read a file and close it.  Returns the file source."""
     fobj = open(filename,'r');
     source = fobj.read();
     fobj.close()
     return source
 
 def file_readlines(filename):
     """Read a file and close it.  Returns the file source using readlines()."""
     fobj = open(filename,'r');
     lines = fobj.readlines();
     fobj.close()
     return lines
 
 #----------------------------------------------------------------------------
 def target_outdated(target,deps):
     """Determine whether a target is out of date.
 
     target_outdated(target,deps) -> 1/0
 
     deps: list of filenames which MUST exist.
     target: single filename which may or may not exist.
 
     If target doesn't exist or is older than any file listed in deps, return
     true, otherwise return false.
     """
     try:
         target_time = os.path.getmtime(target)
     except os.error:
         return 1
     for dep in deps:
         dep_time = os.path.getmtime(dep)
         if dep_time > target_time:
             #print "For target",target,"Dep failed:",dep # dbg
             #print "times (dep,tar):",dep_time,target_time # dbg
             return 1
     return 0
 
 #-----------------------------------------------------------------------------
 def target_update(target,deps,cmd):
     """Update a target with a given command given a list of dependencies.
 
     target_update(target,deps,cmd) -> runs cmd if target is outdated.
 
     This is just a wrapper around target_outdated() which calls the given
     command if target is outdated."""
 
     if target_outdated(target,deps):
         xsys(cmd)
 
 #----------------------------------------------------------------------------
 def unquote_ends(istr):
     """Remove a single pair of quotes from the endpoints of a string."""
 
     if not istr:
         return istr
     if (istr[0]=="'" and istr[-1]=="'") or \
        (istr[0]=='"' and istr[-1]=='"'):
         return istr[1:-1]
     else:
         return istr
 
 #----------------------------------------------------------------------------
 def process_cmdline(argv,names=[],defaults={},usage=''):
     """ Process command-line options and arguments.
 
     Arguments:
 
     - argv: list of arguments, typically sys.argv.
     
     - names: list of option names. See DPyGetOpt docs for details on options
     syntax.
 
     - defaults: dict of default values.
 
     - usage: optional usage notice to print if a wrong argument is passed.
 
     Return a dict of options and a list of free arguments."""
 
     getopt = DPyGetOpt.DPyGetOpt()
     getopt.setIgnoreCase(0)
     getopt.parseConfiguration(names)
 
     try:
         getopt.processArguments(argv)
     except:
         print usage
         warn(`sys.exc_value`,level=4)
 
     defaults.update(getopt.optionValues)
     args = getopt.freeValues
     
     return defaults,args
 
 #----------------------------------------------------------------------------
 def optstr2types(ostr):
     """Convert a string of option names to a dict of type mappings.
 
     optstr2types(str) -> {None:'string_opts',int:'int_opts',float:'float_opts'}
 
     This is used to get the types of all the options in a string formatted
     with the conventions of DPyGetOpt. The 'type' None is used for options
     which are strings (they need no further conversion). This function's main
     use is to get a typemap for use with read_dict().
     """
 
     typeconv = {None:'',int:'',float:''}
     typemap = {'s':None,'i':int,'f':float}
     opt_re = re.compile(r'([\w]*)([^:=]*:?=?)([sif]?)')
 
     for w in ostr.split():
         oname,alias,otype = opt_re.match(w).groups()
         if otype == '' or alias == '!':   # simple switches are integers too
             otype = 'i'
         typeconv[typemap[otype]] += oname + ' '
     return typeconv
 
 #----------------------------------------------------------------------------
 def read_dict(filename,type_conv=None,**opt):
 
     """Read a dictionary of key=value pairs from an input file, optionally
     performing conversions on the resulting values.
 
     read_dict(filename,type_conv,**opt) -> dict
 
     Only one value per line is accepted, the format should be
      # optional comments are ignored
      key value\n
 
     Args:
 
       - type_conv: A dictionary specifying which keys need to be converted to
       which types. By default all keys are read as strings. This dictionary
       should have as its keys valid conversion functions for strings
       (int,long,float,complex, or your own).  The value for each key
       (converter) should be a whitespace separated string containing the names
       of all the entries in the file to be converted using that function. For
       keys to be left alone, use None as the conversion function (only needed
       with purge=1, see below).
 
       - opt: dictionary with extra options as below (default in parens)
 
         purge(0): if set to 1, all keys *not* listed in type_conv are purged out
         of the dictionary to be returned. If purge is going to be used, the
         set of keys to be left as strings also has to be explicitly specified
         using the (non-existent) conversion function None.
 
         fs(None): field separator. This is the key/value separator to be used
         when parsing the file. The None default means any whitespace [behavior
         of string.split()].
 
         strip(0): if 1, strip string values of leading/trailinig whitespace.
 
         warn(1): warning level if requested keys are not found in file.
           - 0: silently ignore.
           - 1: inform but proceed.
           - 2: raise KeyError exception.
 
         no_empty(0): if 1, remove keys with whitespace strings as a value.
 
         unique([]): list of keys (or space separated string) which can't be
         repeated. If one such key is found in the file, each new instance
         overwrites the previous one. For keys not listed here, the behavior is
         to make a list of all appearances.
 
     Example:
     If the input file test.ini has:
       i 3
       x 4.5
       y 5.5
       s hi ho
     Then:
 
     >>> type_conv={int:'i',float:'x',None:'s'}
     >>> read_dict('test.ini')
     {'i': '3', 's': 'hi ho', 'x': '4.5', 'y': '5.5'}
     >>> read_dict('test.ini',type_conv)
     {'i': 3, 's': 'hi ho', 'x': 4.5, 'y': '5.5'}
     >>> read_dict('test.ini',type_conv,purge=1)
     {'i': 3, 's': 'hi ho', 'x': 4.5}
     """
 
     # starting config
     opt.setdefault('purge',0)
     opt.setdefault('fs',None)  # field sep defaults to any whitespace
     opt.setdefault('strip',0)
     opt.setdefault('warn',1)
     opt.setdefault('no_empty',0)
     opt.setdefault('unique','')
     if type(opt['unique']) in StringTypes:
         unique_keys = qw(opt['unique'])
     elif type(opt['unique']) in (types.TupleType,types.ListType):
         unique_keys = opt['unique']
     else:
         raise ValueError, 'Unique keys must be given as a string, List or Tuple'
 
     dict = {}
     # first read in table of values as strings
     file = open(filename,'r')
     for line in file.readlines():
         line = line.strip()
         if len(line) and line[0]=='#': continue
         if len(line)>0:
             lsplit = line.split(opt['fs'],1)
             try:
                 key,val = lsplit
             except ValueError:
                 key,val = lsplit[0],''
             key = key.strip()
             if opt['strip']: val = val.strip()
             if val == "''" or val == '""': val = ''
             if opt['no_empty'] and (val=='' or val.isspace()):
                 continue
             # if a key is found more than once in the file, build a list
             # unless it's in the 'unique' list. In that case, last found in file
             # takes precedence. User beware.
             try:
                 if dict[key] and key in unique_keys:
                     dict[key] = val
                 elif type(dict[key]) is types.ListType:
                     dict[key].append(val)
                 else:
                     dict[key] = [dict[key],val]
             except KeyError:
                 dict[key] = val
     # purge if requested
     if opt['purge']:
         accepted_keys = qwflat(type_conv.values())
         for key in dict.keys():
             if key in accepted_keys: continue
             del(dict[key])
     # now convert if requested
     if type_conv==None: return dict
     conversions = type_conv.keys()
     try: conversions.remove(None)
     except: pass
     for convert in conversions:
         for val in qw(type_conv[convert]):
             try:
                 dict[val] = convert(dict[val])
             except KeyError,e:
                 if opt['warn'] == 0:
                     pass
                 elif opt['warn'] == 1:
                     print >>sys.stderr, 'Warning: key',val,\
                           'not found in file',filename
                 elif opt['warn'] == 2:
                     raise KeyError,e
                 else:
                     raise ValueError,'Warning level must be 0,1 or 2'
 
     return dict
 
 #----------------------------------------------------------------------------
 def flag_calls(func):
     """Wrap a function to detect and flag when it gets called.
 
     This is a decorator which takes a function and wraps it in a function with
     a 'called' attribute. wrapper.called is initialized to False.
 
     The wrapper.called attribute is set to False right before each call to the
     wrapped function, so if the call fails it remains False.  After the call
     completes, wrapper.called is set to True and the output is returned.
 
     Testing for truth in wrapper.called allows you to determine if a call to
     func() was attempted and succeeded."""
     
     def wrapper(*args,**kw):
         wrapper.called = False
         out = func(*args,**kw)
         wrapper.called = True
         return out
 
     wrapper.called = False
     wrapper.__doc__ = func.__doc__
     return wrapper
 
 #----------------------------------------------------------------------------
 class HomeDirError(Error):
     pass
 
 def get_home_dir():
     """Return the closest possible equivalent to a 'home' directory.
 
     We first try $HOME.  Absent that, on NT it's $HOMEDRIVE\$HOMEPATH.
 
     Currently only Posix and NT are implemented, a HomeDirError exception is
     raised for all other OSes. """
 
     isdir = os.path.isdir
     env = os.environ
     try:
         homedir = env['HOME']
         if not isdir(homedir):
             # in case a user stuck some string which does NOT resolve to a
             # valid path, it's as good as if we hadn't foud it
             raise KeyError
         return homedir
     except KeyError:
         if os.name == 'posix':
             raise HomeDirError,'undefined $HOME, IPython can not proceed.'
         elif os.name == 'nt':
             # For some strange reason, win9x returns 'nt' for os.name.
             try:
                 homedir = os.path.join(env['HOMEDRIVE'],env['HOMEPATH'])
                 if not isdir(homedir):
                     homedir = os.path.join(env['USERPROFILE'])
                     if not isdir(homedir):
                         raise HomeDirError
                 return homedir
             except:
                 try:
                     # Use the registry to get the 'My Documents' folder.
                     import _winreg as wreg
                     key = wreg.OpenKey(wreg.HKEY_CURRENT_USER,
                                        "Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders")
                     homedir = wreg.QueryValueEx(key,'Personal')[0]
                     key.Close()
                     if not isdir(homedir):
                         e = ('Invalid "Personal" folder registry key '
                              'typically "My Documents".\n'
                              'Value: %s\n'
                              'This is not a valid directory on your system.' %
                              homedir)
                         raise HomeDirError(e)
                     return homedir
                 except HomeDirError:
                     raise
                 except:
                     return 'C:\\'
         elif os.name == 'dos':
             # Desperate, may do absurd things in classic MacOS. May work under DOS.
             return 'C:\\'
         else:
             raise HomeDirError,'support for your operating system not implemented.'
 
 #****************************************************************************
 # strings and text
 
 class LSString(str):
     """String derivative with a special access attributes.
 
     These are normal strings, but with the special attributes:
 
         .l (or .list) : value as list (split on newlines).
         .n (or .nlstr): original value (the string itself).
         .s (or .spstr): value as whitespace-separated string.
         
     Any values which require transformations are computed only once and
     cached.
 
     Such strings are very useful to efficiently interact with the shell, which
     typically only understands whitespace-separated options for commands."""
 
     def get_list(self):
         try:
             return self.__list
         except AttributeError:
             self.__list = self.split('\n')
             return self.__list
 
     l = list = property(get_list)
 
     def get_spstr(self):
         try:
             return self.__spstr
         except AttributeError:
             self.__spstr = self.replace('\n',' ')
             return self.__spstr
 
     s = spstr = property(get_spstr)
 
     def get_nlstr(self):
         return self
 
     n = nlstr = property(get_nlstr)
 
     def get_paths(self):
         try:
             return self.__paths
         except AttributeError:
             self.__paths = [path(p) for p in self.split('\n') if os.path.exists(p)]
             return self.__paths
     
     p = paths = property(get_paths)
 
 
 #----------------------------------------------------------------------------
 class SList(list):
     """List derivative with a special access attributes.
 
     These are normal lists, but with the special attributes:
 
         .l (or .list) : value as list (the list itself).
         .n (or .nlstr): value as a string, joined on newlines.
         .s (or .spstr): value as a string, joined on spaces.
 
     Any values which require transformations are computed only once and
     cached."""
 
     def get_list(self):
         return self
 
     l = list = property(get_list)
 
     def get_spstr(self):
         try:
             return self.__spstr
         except AttributeError:
             self.__spstr = ' '.join(self)
             return self.__spstr
 
     s = spstr = property(get_spstr)
 
     def get_nlstr(self):
         try:
             return self.__nlstr
         except AttributeError:
             self.__nlstr = '\n'.join(self)
             return self.__nlstr
 
     n = nlstr = property(get_nlstr)
     
     def get_paths(self):
         try:
             return self.__paths
         except AttributeError:
             self.__paths = [path(p) for p in self if os.path.exists(p)]
             return self.__paths
     
     p = paths = property(get_paths)
 
 #----------------------------------------------------------------------------
 def esc_quotes(strng):
     """Return the input string with single and double quotes escaped out"""
 
     return strng.replace('"','\\"').replace("'","\\'")
 
 #----------------------------------------------------------------------------
 def make_quoted_expr(s):
     """Return string s in appropriate quotes, using raw string if possible.
     
     Effectively this turns string: cd \ao\ao\
     to: r"cd \ao\ao\_"[:-1]
     
     Note the use of raw string and padding at the end to allow trailing backslash.
     
     """
     
     tail = ''
     tailpadding = ''
     raw  = ''
     if "\\" in s:
         raw = 'r'
         if s.endswith('\\'):
             tail = '[:-1]'
             tailpadding = '_'
     if '"' not in s:
         quote = '"'
     elif "'" not in s:
         quote = "'"
     elif '"""' not in s and not s.endswith('"'):
         quote = '"""'
     elif "'''" not in s and not s.endswith("'"):
         quote = "'''"
     else:
         # give up, backslash-escaped string will do
         return '"%s"' % esc_quotes(s)
     res = itpl("$raw$quote$s$tailpadding$quote$tail")
     return res
 
 
 #----------------------------------------------------------------------------
 def raw_input_multi(header='', ps1='==> ', ps2='..> ',terminate_str = '.'):
     """Take multiple lines of input.
 
     A list with each line of input as a separate element is returned when a
     termination string is entered (defaults to a single '.'). Input can also
     terminate via EOF (^D in Unix, ^Z-RET in Windows).
 
     Lines of input which end in \\ are joined into single entries (and a
     secondary continuation prompt is issued as long as the user terminates
     lines with \\). This allows entering very long strings which are still
     meant to be treated as single entities.
     """
 
     try:
         if header:
             header += '\n'
         lines = [raw_input(header + ps1)]
     except EOFError:
         return []
     terminate = [terminate_str]
     try:
         while lines[-1:] != terminate:
             new_line = raw_input(ps1)
             while new_line.endswith('\\'):
                 new_line = new_line[:-1] + raw_input(ps2)
             lines.append(new_line)
                 
         return lines[:-1]  # don't return the termination command
     except EOFError:
         print
         return lines
 
 #----------------------------------------------------------------------------
 def raw_input_ext(prompt='',  ps2='... '):
     """Similar to raw_input(), but accepts extended lines if input ends with \\."""
 
     line = raw_input(prompt)
     while line.endswith('\\'):
         line = line[:-1] + raw_input(ps2)
     return line
 
 #----------------------------------------------------------------------------
 def ask_yes_no(prompt,default=None):
     """Asks a question and returns an integer 1/0 (y/n) answer.
 
     If default is given (one of 'y','n'), it is used if the user input is
     empty. Otherwise the question is repeated until an answer is given.
     If EOF occurs 20 times consecutively, the default answer is assumed,
     or if there is no default, an exception is raised to prevent infinite
     loops.
 
     Valid answers are: y/yes/n/no (match is not case sensitive)."""
 
     answers = {'y':True,'n':False,'yes':True,'no':False}
     ans = None
     eofs, max_eofs = 0, 20
     while ans not in answers.keys():
         try:
             ans = raw_input(prompt+' ').lower()
             if not ans:  # response was an empty string
                 ans = default
             eofs = 0
         except (EOFError,KeyboardInterrupt):
             eofs = eofs + 1
             if eofs >= max_eofs:
                 if default in answers.keys():
                     ans = default
                 else:
                     raise
             
     return answers[ans]
 
 #----------------------------------------------------------------------------
 def marquee(txt='',width=78,mark='*'):
     """Return the input string centered in a 'marquee'."""
     if not txt:
         return (mark*width)[:width]
     nmark = (width-len(txt)-2)/len(mark)/2
     if nmark < 0: nmark =0
     marks = mark*nmark
     return '%s %s %s' % (marks,txt,marks)
 
 #----------------------------------------------------------------------------
 class EvalDict:
     """
     Emulate a dict which evaluates its contents in the caller's frame.
 
     Usage:
     >>>number = 19
     >>>text = "python"
     >>>print "%(text.capitalize())s %(number/9.0).1f rules!" % EvalDict()
     """
 
     # This version is due to [e-mail] on c.l.py, and is basically a
     # modified (shorter) version of:
     # http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66018 by
     # Skip Montanaro ([e-mail]).
 
     def __getitem__(self, name):
         frame = sys._getframe(1)
         return eval(name, frame.f_globals, frame.f_locals)
 
 EvalString = EvalDict  # for backwards compatibility
 #----------------------------------------------------------------------------
 def qw(words,flat=0,sep=None,maxsplit=-1):
     """Similar to Perl's qw() operator, but with some more options.
 
     qw(words,flat=0,sep=' ',maxsplit=-1) -> words.split(sep,maxsplit)
 
     words can also be a list itself, and with flat=1, the output will be
     recursively flattened. Examples:
 
     >>> qw('1 2')
     ['1', '2']
     >>> qw(['a b','1 2',['m n','p q']])
     [['a', 'b'], ['1', '2'], [['m', 'n'], ['p', 'q']]]
     >>> qw(['a b','1 2',['m n','p q']],flat=1)
     ['a', 'b', '1', '2', 'm', 'n', 'p', 'q']    """
 
     if type(words) in StringTypes:
         return [word.strip() for word in words.split(sep,maxsplit)
                 if word and not word.isspace() ]
     if flat:
         return flatten(map(qw,words,[1]*len(words)))
     return map(qw,words)
 
 #----------------------------------------------------------------------------
 def qwflat(words,sep=None,maxsplit=-1):
     """Calls qw(words) in flat mode. It's just a convenient shorthand."""
     return qw(words,1,sep,maxsplit)
 
 #----------------------------------------------------------------------------
 def qw_lol(indata):
     """qw_lol('a b') -> [['a','b']],
     otherwise it's just a call to qw().
 
     We need this to make sure the modules_some keys *always* end up as a
     list of lists."""
 
     if type(indata) in StringTypes:
         return [qw(indata)]
     else:
         return qw(indata)
 
 #-----------------------------------------------------------------------------
 def list_strings(arg):
     """Always return a list of strings, given a string or list of strings
     as input."""
 
     if type(arg) in StringTypes: return [arg]
     else: return arg
 
 #----------------------------------------------------------------------------
 def grep(pat,list,case=1):
     """Simple minded grep-like function.
     grep(pat,list) returns occurrences of pat in list, None on failure.
 
     It only does simple string matching, with no support for regexps. Use the
     option case=0 for case-insensitive matching."""
 
     # This is pretty crude. At least it should implement copying only references
     # to the original data in case it's big. Now it copies the data for output.
     out=[]
     if case:
         for term in list:
             if term.find(pat)>-1: out.append(term)
     else:
         lpat=pat.lower()
         for term in list:
             if term.lower().find(lpat)>-1: out.append(term)
 
     if len(out): return out
     else: return None
 
 #----------------------------------------------------------------------------
 def dgrep(pat,*opts):
     """Return grep() on dir()+dir(__builtins__).
 
     A very common use of grep() when working interactively."""
 
     return grep(pat,dir(__main__)+dir(__main__.__builtins__),*opts)
 
 #----------------------------------------------------------------------------
 def idgrep(pat):
     """Case-insensitive dgrep()"""
 
     return dgrep(pat,0)
 
 #----------------------------------------------------------------------------
 def igrep(pat,list):
     """Synonym for case-insensitive grep."""
 
     return grep(pat,list,case=0)
 
 #----------------------------------------------------------------------------
 def indent(str,nspaces=4,ntabs=0):
     """Indent a string a given number of spaces or tabstops.
     
     indent(str,nspaces=4,ntabs=0) -> indent str by ntabs+nspaces.
     """
     if str is None:
         return
     ind = '\t'*ntabs+' '*nspaces
     outstr = '%s%s' % (ind,str.replace(os.linesep,os.linesep+ind))
     if outstr.endswith(os.linesep+ind):
         return outstr[:-len(ind)]
     else:
         return outstr
     
 #-----------------------------------------------------------------------------
 def native_line_ends(filename,backup=1):
     """Convert (in-place) a file to line-ends native to the current OS.
 
     If the optional backup argument is given as false, no backup of the
     original file is left.  """
 
     backup_suffixes = {'posix':'~','dos':'.bak','nt':'.bak','mac':'.bak'}
 
     bak_filename = filename + backup_suffixes[os.name]
 
     original = open(filename).read()
     shutil.copy2(filename,bak_filename)
     try:
         new = open(filename,'wb')
         new.write(os.linesep.join(original.splitlines()))
         new.write(os.linesep) # ALWAYS put an eol at the end of the file
         new.close()
     except:
         os.rename(bak_filename,filename)
     if not backup:
         try:
             os.remove(bak_filename)
         except:
             pass
     
 #----------------------------------------------------------------------------
 def get_pager_cmd(pager_cmd = None):
     """Return a pager command.
 
     Makes some attempts at finding an OS-correct one."""
     
     if os.name == 'posix':
         default_pager_cmd = 'less -r'  # -r for color control sequences
     elif os.name in ['nt','dos']:
         default_pager_cmd = 'type'
 
     if pager_cmd is None:
         try:
             pager_cmd = os.environ['PAGER']
         except:
             pager_cmd = default_pager_cmd
     return pager_cmd
 
 #-----------------------------------------------------------------------------
 def get_pager_start(pager,start):
     """Return the string for paging files with an offset.
 
     This is the '+N' argument which less and more (under Unix) accept.
     """
 
     if pager in ['less','more']:
         if start:
             start_string = '+' + str(start)
         else:
             start_string = ''
     else:
         start_string = ''
     return start_string
 
 #----------------------------------------------------------------------------
 if os.name == "nt":
     import msvcrt
     def page_more():
         """ Smart pausing between pages
 
         @return:    True if need print more lines, False if quit
         """
         Term.cout.write('---Return to continue, q to quit--- ')
         ans = msvcrt.getch()
         if ans in ("q", "Q"):
             result = False
         else:
             result = True
         Term.cout.write("\b"*37 + " "*37 + "\b"*37)
         return result
 else:
     def page_more():
         ans = raw_input('---Return to continue, q to quit--- ')
         if ans.lower().startswith('q'):
             return False
         else:
             return True
 
 esc_re = re.compile(r"(\x1b[^m]+m)")
 
 def page_dumb(strng,start=0,screen_lines=25):
     """Very dumb 'pager' in Python, for when nothing else works.
 
     Only moves forward, same interface as page(), except for pager_cmd and
     mode."""
 
     out_ln  = strng.splitlines()[start:]
     screens = chop(out_ln,screen_lines-1)
     if len(screens) == 1:
         print >>Term.cout, os.linesep.join(screens[0])
     else:
         last_escape = ""
         for scr in screens[0:-1]:
             hunk = os.linesep.join(scr)
             print >>Term.cout, last_escape + hunk
             if not page_more():
                 return
             esc_list = esc_re.findall(hunk)
             if len(esc_list) > 0:
                 last_escape = esc_list[-1]
         print >>Term.cout, last_escape + os.linesep.join(screens[-1])
 
 #----------------------------------------------------------------------------
 def page(strng,start=0,screen_lines=0,pager_cmd = None):
     """Print a string, piping through a pager after a certain length.
 
     The screen_lines parameter specifies the number of *usable* lines of your
     terminal screen (total lines minus lines you need to reserve to show other
     information).
 
     If you set screen_lines to a number <=0, page() will try to auto-determine
     your screen size and will only use up to (screen_size+screen_lines) for
     printing, paging after that. That is, if you want auto-detection but need
     to reserve the bottom 3 lines of the screen, use screen_lines = -3, and for
     auto-detection without any lines reserved simply use screen_lines = 0.
 
     If a string won't fit in the allowed lines, it is sent through the
     specified pager command. If none given, look for PAGER in the environment,
     and ultimately default to less.
 
     If no system pager works, the string is sent through a 'dumb pager'
     written in python, very simplistic.
     """
     
     # Ugly kludge, but calling curses.initscr() flat out crashes in emacs
     TERM = os.environ.get('TERM','dumb')
     if TERM in ['dumb','emacs'] and os.name != 'nt':
         print strng
         return
     # chop off the topmost part of the string we don't want to see
     str_lines = strng.split(os.linesep)[start:]
     str_toprint = os.linesep.join(str_lines)
     num_newlines = len(str_lines)
     len_str = len(str_toprint)
     
     # Dumb heuristics to guesstimate number of on-screen lines the string
     # takes.  Very basic, but good enough for docstrings in reasonable
     # terminals. If someone later feels like refining it, it's not hard.
     numlines = max(num_newlines,int(len_str/80)+1)
 
     if os.name == "nt":
         screen_lines_def = get_console_size(defaulty=25)[1]
     else:
         screen_lines_def = 25 # default value if we can't auto-determine
 
     # auto-determine screen size
     if screen_lines <= 0:
         if TERM=='xterm':
             try:
                 import curses
                 if hasattr(curses,'initscr'):
                     use_curses = 1
                 else:
                     use_curses = 0
             except ImportError:
                 use_curses = 0
         else:
             # curses causes problems on many terminals other than xterm.
             use_curses = 0
         if use_curses:
                 scr = curses.initscr()
                 screen_lines_real,screen_cols = scr.getmaxyx()
                 curses.endwin()
                 screen_lines += screen_lines_real
                 #print '***Screen size:',screen_lines_real,'lines x',\
                 #screen_cols,'columns.' # dbg
         else:
                 screen_lines += screen_lines_def
 
     #print 'numlines',numlines,'screenlines',screen_lines  # dbg
     if numlines <= screen_lines :
         #print '*** normal print'  # dbg
         print >>Term.cout, str_toprint
     else:
         # Try to open pager and default to internal one if that fails.
         # All failure modes are tagged as 'retval=1', to match the return
         # value of a failed system command.  If any intermediate attempt
         # sets retval to 1, at the end we resort to our own page_dumb() pager.
         pager_cmd = get_pager_cmd(pager_cmd)
         pager_cmd += ' ' + get_pager_start(pager_cmd,start)
         if os.name == 'nt':
             if pager_cmd.startswith('type'):
                 # The default WinXP 'type' command is failing on complex strings.
                 retval = 1
             else:
                 tmpname = tempfile.mktemp('.txt')
                 tmpfile = file(tmpname,'wt')
                 tmpfile.write(strng)
                 tmpfile.close()
                 cmd = "%s < %s" % (pager_cmd,tmpname)
                 if os.system(cmd):
                   retval = 1
                 else:
                   retval = None
                 os.remove(tmpname)
         else:
             try:
                 retval = None
                 # if I use popen4, things hang. No idea why.
                 #pager,shell_out = os.popen4(pager_cmd)
                 pager = os.popen(pager_cmd,'w')
                 pager.write(strng)
                 pager.close()
                 retval = pager.close()  # success returns None
             except IOError,msg:  # broken pipe when user quits
                 if msg.args == (32,'Broken pipe'):
                     retval = None
                 else:
                     retval = 1
             except OSError:
                 # Other strange problems, sometimes seen in Win2k/cygwin
                 retval = 1
         if retval is not None:
             page_dumb(strng,screen_lines=screen_lines)
 
 #----------------------------------------------------------------------------
 def page_file(fname,start = 0, pager_cmd = None):
     """Page a file, using an optional pager command and starting line.
     """
 
     pager_cmd = get_pager_cmd(pager_cmd)
     pager_cmd += ' ' + get_pager_start(pager_cmd,start)
 
     try:
         if os.environ['TERM'] in ['emacs','dumb']:
             raise EnvironmentError
         xsys(pager_cmd + ' ' + fname)
     except:
         try:
             if start > 0:
                 start -= 1
             page(open(fname).read(),start)
         except:
             print 'Unable to show file',`fname`
 
 #----------------------------------------------------------------------------
 def snip_print(str,width = 75,print_full = 0,header = ''):
     """Print a string snipping the midsection to fit in width.
 
     print_full: mode control:
       - 0: only snip long strings
       - 1: send to page() directly.
       - 2: snip long strings and ask for full length viewing with page()
     Return 1 if snipping was necessary, 0 otherwise."""
 
     if print_full == 1:
         page(header+str)
         return 0
 
     print header,
     if len(str) < width:
         print str
         snip = 0
     else:
         whalf = int((width -5)/2)
         print str[:whalf] + ' <...> ' + str[-whalf:]
         snip = 1
     if snip and print_full == 2:
         if raw_input(header+' Snipped. View (y/n)? [N]').lower() == 'y':
             page(str)
     return snip
 
 #****************************************************************************
 # lists, dicts and structures
 
 def belong(candidates,checklist):
     """Check whether a list of items appear in a given list of options.
 
     Returns a list of 1 and 0, one for each candidate given."""
 
     return [x in checklist for x in candidates]
 
 #----------------------------------------------------------------------------
 def uniq_stable(elems):
     """uniq_stable(elems) -> list
 
     Return from an iterable, a list of all the unique elements in the input,
     but maintaining the order in which they first appear.
 
     A naive solution to this problem which just makes a dictionary with the
     elements as keys fails to respect the stability condition, since
     dictionaries are unsorted by nature.
 
     Note: All elements in the input must be valid dictionary keys for this
     routine to work, as it internally uses a dictionary for efficiency
     reasons."""
     
     unique = []
     unique_dict = {}
     for nn in elems:
         if nn not in unique_dict:
             unique.append(nn)
             unique_dict[nn] = None
     return unique
 
 #----------------------------------------------------------------------------
 class NLprinter:
     """Print an arbitrarily nested list, indicating index numbers.
 
     An instance of this class called nlprint is available and callable as a
     function.
     
     nlprint(list,indent=' ',sep=': ') -> prints indenting each level by 'indent'
     and using 'sep' to separate the index from the value. """
 
     def __init__(self):
         self.depth = 0
     
     def __call__(self,lst,pos='',**kw):
         """Prints the nested list numbering levels."""
         kw.setdefault('indent',' ')
         kw.setdefault('sep',': ')
         kw.setdefault('start',0)
         kw.setdefault('stop',len(lst))
         # we need to remove start and stop from kw so they don't propagate
         # into a recursive call for a nested list.
         start = kw['start']; del kw['start']
         stop = kw['stop']; del kw['stop']
         if self.depth == 0 and 'header' in kw.keys():
             print kw['header']
             
         for idx in range(start,stop):
             elem = lst[idx]
             if type(elem)==type([]):
                 self.depth += 1
                 self.__call__(elem,itpl('$pos$idx,'),**kw)
                 self.depth -= 1
             else:
                 printpl(kw['indent']*self.depth+'$pos$idx$kw["sep"]$elem')
 
 nlprint = NLprinter()
 #----------------------------------------------------------------------------
 def all_belong(candidates,checklist):
     """Check whether a list of items ALL appear in a given list of options.
 
     Returns a single 1 or 0 value."""
 
     return 1-(0 in [x in checklist for x in candidates])
 
 #----------------------------------------------------------------------------
 def sort_compare(lst1,lst2,inplace = 1):
     """Sort and compare two lists.
 
     By default it does it in place, thus modifying the lists. Use inplace = 0
     to avoid that (at the cost of temporary copy creation)."""
     if not inplace:
         lst1 = lst1[:]
         lst2 = lst2[:]
     lst1.sort(); lst2.sort()
     return lst1 == lst2
 
 #----------------------------------------------------------------------------
 def mkdict(**kwargs):
     """Return a dict from a keyword list.
 
     It's just syntactic sugar for making ditcionary creation more convenient:
     # the standard way
     >>>data = { 'red' : 1, 'green' : 2, 'blue' : 3 }
     # a cleaner way
     >>>data = dict(red=1, green=2, blue=3)
 
     If you need more than this, look at the Struct() class."""
 
     return kwargs
 
 #----------------------------------------------------------------------------
 def list2dict(lst):
     """Takes a list of (key,value) pairs and turns it into a dict."""
 
     dic = {}
     for k,v in lst: dic[k] = v
     return dic
 
 #----------------------------------------------------------------------------
 def list2dict2(lst,default=''):
     """Takes a list and turns it into a dict.
     Much slower than list2dict, but more versatile. This version can take
     lists with sublists of arbitrary length (including sclars)."""
 
     dic = {}
     for elem in lst:
         if type(elem) in (types.ListType,types.TupleType):
             size = len(elem)
             if  size == 0:
                 pass
             elif size == 1:
                 dic[elem] = default
             else:
                 k,v = elem[0], elem[1:]
                 if len(v) == 1: v = v[0]
                 dic[k] = v
         else:
             dic[elem] = default
     return dic
 
 #----------------------------------------------------------------------------
 def flatten(seq):
     """Flatten a list of lists (NOT recursive, only works for 2d lists)."""
 
-    # bug in python??? (YES. Fixed in 2.2, let's leave the kludgy fix in).
-
-    # if the x=0 isn't made, a *global* variable x is left over after calling
-    # this function, with the value of the last element in the return
-    # list. This does seem like a bug big time to me.
-
-    # the problem is fixed with the x=0, which seems to force the creation of
-    # a local name
-
-    x = 0 
     return [x for subseq in seq for x in subseq]
 
 #----------------------------------------------------------------------------
 def get_slice(seq,start=0,stop=None,step=1):
     """Get a slice of a sequence with variable step. Specify start,stop,step."""
     if stop == None:
         stop = len(seq)
     item = lambda i: seq[i]
     return map(item,xrange(start,stop,step))
 
 #----------------------------------------------------------------------------
 def chop(seq,size):
     """Chop a sequence into chunks of the given size."""
     chunk = lambda i: seq[i:i+size]
     return map(chunk,xrange(0,len(seq),size))
 
 #----------------------------------------------------------------------------
 def with(object, **args):
     """Set multiple attributes for an object, similar to Pascal's with.
 
     Example:
     with(jim,
          born = 1960,
          haircolour = 'Brown',
          eyecolour = 'Green')
 
     Credit: Greg Ewing, in
     http://mail.python.org/pipermail/python-list/2001-May/040703.html"""
 
     object.__dict__.update(args)
 
 #----------------------------------------------------------------------------
 def setattr_list(obj,alist,nspace = None):
     """Set a list of attributes for an object taken from a namespace.
 
     setattr_list(obj,alist,nspace) -> sets in obj all the attributes listed in
     alist with their values taken from nspace, which must be a dict (something
     like locals() will often do) If nspace isn't given, locals() of the
     *caller* is used, so in most cases you can omit it.
 
     Note that alist can be given as a string, which will be automatically
     split into a list on whitespace. If given as a list, it must be a list of
     *strings* (the variable names themselves), not of variables."""
 
     # this grabs the local variables from the *previous* call frame -- that is
     # the locals from the function that called setattr_list().
     # - snipped from weave.inline()
     if nspace is None:
         call_frame = sys._getframe().f_back
         nspace = call_frame.f_locals
 
     if type(alist) in StringTypes:
         alist = alist.split()
     for attr in alist:
         val = eval(attr,nspace)
         setattr(obj,attr,val)
 
 #----------------------------------------------------------------------------
 def getattr_list(obj,alist,*args):
     """getattr_list(obj,alist[, default]) -> attribute list.
 
     Get a list of named attributes for an object. When a default argument is
     given, it is returned when the attribute doesn't exist; without it, an
     exception is raised in that case.
 
     Note that alist can be given as a string, which will be automatically
     split into a list on whitespace. If given as a list, it must be a list of
     *strings* (the variable names themselves), not of variables."""
 
     if type(alist) in StringTypes:
         alist = alist.split()
     if args:
         if len(args)==1:
             default = args[0]
             return map(lambda attr: getattr(obj,attr,default),alist)
         else:
             raise ValueError,'getattr_list() takes only one optional argument'
     else:
         return map(lambda attr: getattr(obj,attr),alist)
     
 #----------------------------------------------------------------------------
 def map_method(method,object_list,*argseq,**kw):
     """map_method(method,object_list,*args,**kw) -> list
 
     Return a list of the results of applying the methods to the items of the
     argument sequence(s).  If more than one sequence is given, the method is
     called with an argument list consisting of the corresponding item of each
     sequence. All sequences must be of the same length.
 
     Keyword arguments are passed verbatim to all objects called.
 
     This is Python code, so it's not nearly as fast as the builtin map()."""
 
     out_list = []
     idx = 0
     for object in object_list:
         try:
             handler = getattr(object, method)
         except AttributeError:
             out_list.append(None)
         else:
             if argseq:
                 args = map(lambda lst:lst[idx],argseq)
                 #print 'ob',object,'hand',handler,'ar',args # dbg
                 out_list.append(handler(args,**kw))
             else:
                 out_list.append(handler(**kw))
         idx += 1
     return out_list
 
 #----------------------------------------------------------------------------
 def import_fail_info(mod_name,fns=None):
     """Inform load failure for a module."""
 
     if fns == None:
         warn("Loading of %s failed.\n" % (mod_name,))
     else:
         warn("Loading of %s from %s failed.\n" % (fns,mod_name))
 
 #----------------------------------------------------------------------------
 # Proposed popitem() extension, written as a method
 
 class NotGiven: pass
 
 def popkey(dct,key,default=NotGiven):
     """Return dct[key] and delete dct[key].
 
     If default is given, return it if dct[key] doesn't exist, otherwise raise
     KeyError.  """
 
     try:
         val = dct[key]
     except KeyError:
         if default is NotGiven:
             raise
         else:
             return default
     else:
         del dct[key]
         return val
 #*************************** end of file <genutils.py> **********************
 

IPython/ipapi.py

@@ -1,203 +1,321 b''
 ''' IPython customization API
 
 Your one-stop module for configuring & extending ipython
 
 The API will probably break when ipython 1.0 is released, but so 
 will the other configuration method (rc files).
 
 All names prefixed by underscores are for internal use, not part 
 of the public api.
 
 Below is an example that you can just put to a module and import from ipython. 
 
 A good practice is to install the config script below as e.g. 
 
 ~/.ipython/my_private_conf.py
 
 And do 
 
 import_mod my_private_conf 
 
 in ~/.ipython/ipythonrc
 
 That way the module is imported at startup and you can have all your
 personal configuration (as opposed to boilerplate ipythonrc-PROFILENAME 
 stuff) in there. 
 
 -----------------------------------------------
-import IPython.ipapi as ip
+import IPython.ipapi
+ip = IPython.ipapi.get()
 
 def ankka_f(self, arg):
     print "Ankka",self,"says uppercase:",arg.upper()
 
 ip.expose_magic("ankka",ankka_f)
 
 ip.magic('alias sayhi echo "Testing, hi ok"')
 ip.magic('alias helloworld echo "Hello world"')
 ip.system('pwd')
 
 ip.ex('import re')
 ip.ex("""
 def funcci(a,b):
     print a+b
 print funcci(3,4)
 """)
 ip.ex("funcci(348,9)")
 
 def jed_editor(self,filename, linenum=None):
     print "Calling my own editor, jed ... via hook!"
     import os
     if linenum is None: linenum = 0
     os.system('jed +%d %s' % (linenum, filename))
     print "exiting jed"
 
 ip.set_hook('editor',jed_editor)
 
-o = ip.options()
+o = ip.options
 o.autocall = 2  # FULL autocall mode
 
 print "done!"
-    
 '''
  
+# stdlib imports
+import sys
+
+# our own
+from IPython.genutils import warn,error
  
 class TryNext(Exception):
     """ Try next hook exception.
      
-     Raise this in your hook function to indicate that the next
-     hook handler should be used to handle the operation.
-     If you pass arguments to the constructor those arguments will be
-     used by the next hook instead of the original ones.
+    Raise this in your hook function to indicate that the next hook handler
+    should be used to handle the operation.  If you pass arguments to the
+    constructor those arguments will be used by the next hook instead of the
+    original ones.
     """
 
     def __init__(self, *args, **kwargs):
         self.args = args
         self.kwargs = kwargs
 
-
 # contains the most recently instantiated IPApi
-_recent = None
+
+class IPythonNotRunning:
+    """Dummy do-nothing class.
+
+    Instances of this class return a dummy attribute on all accesses, which
+    can be called and warns.  This makes it easier to write scripts which use
+    the ipapi.get() object for informational purposes to operate both with and
+    without ipython.  Obviously code which uses the ipython object for
+    computations will not work, but this allows a wider range of code to
+    transparently work whether ipython is being used or not."""
+    
+    def __str__(self):
+        return "<IPythonNotRunning>"
+
+    __repr__ = __str__
+
+    def __getattr__(self,name):
+        return self.dummy
+
+    def dummy(self,*args,**kw):
+        """Dummy function, which doesn't do anything but warn."""
+        warn("IPython is not running, this is a dummy no-op function")
+
+_recent = IPythonNotRunning()
 
 def get():
-    """ Get an IPApi object, or None if not running under ipython
+    """Get an IPApi object.
 
-    Running this should be the first thing you do when writing
-    extensions that can be imported as normal modules. You can then 
-    direct all the configuration operations against the returned 
-    object.
+    Returns an instance of IPythonNotRunning if not running under IPython.
 
+    Running this should be the first thing you do when writing extensions that
+    can be imported as normal modules. You can then direct all the
+    configuration operations against the returned object.
     """
 
     return _recent
 
- 
- 
 class IPApi:
     """ The actual API class for configuring IPython 
     
-    You should do all of the IPython configuration by getting 
-    an IPApi object with IPython.ipapi.get() and using the provided
-    methods.
+    You should do all of the IPython configuration by getting an IPApi object
+    with IPython.ipapi.get() and using the attributes and methods of the
+    returned object."""
     
-    """
     def __init__(self,ip):
         
+        # All attributes exposed here are considered to be the public API of
+        # IPython.  As needs dictate, some of these may be wrapped as
+        # properties.
+
         self.magic = ip.ipmagic
         
         self.system = ip.ipsystem
         
         self.set_hook = ip.set_hook
         
         self.set_custom_exc = ip.set_custom_exc
         
+        self.user_ns = ip.user_ns
+
+        # Session-specific data store, which can be used to store
+        # data that should persist through the ipython session.
+        self.meta =  ip.meta
+    
+        # The ipython instance provided
         self.IP = ip
+
         global _recent
         _recent = self
 
+    # Use a property for some things which are added to the instance very
+    # late.  I don't have time right now to disentangle the initialization
+    # order issues, so a property lets us delay item extraction while
+    # providing a normal attribute API.
+    def get_db(self):
+        """A handle to persistent dict-like database (a PickleShareDB object)"""
+        return self.IP.db
         
+    db = property(get_db,None,None,get_db.__doc__)
     
-    def options(self):
-        """ All configurable variables """
+    def get_options(self):
+        """All configurable variables."""
         return self.IP.rc
     
-    def user_ns(self):
-        return self.IP.user_ns
+    options = property(get_options,None,None,get_options.__doc__)
     
     def expose_magic(self,magicname, func):
         ''' Expose own function as magic function for ipython 
     
         def foo_impl(self,parameter_s=''):
             """My very own magic!. (Use docstrings, IPython reads them)."""
             print 'Magic function. Passed parameter is between < >: <'+parameter_s+'>'
             print 'The self object is:',self
     
         ipapi.expose_magic("foo",foo_impl)
         '''
                 
         import new
         im = new.instancemethod(func,self.IP, self.IP.__class__)
         setattr(self.IP, "magic_" + magicname, im)
     
-    
     def ex(self,cmd):
         """ Execute a normal python statement in user namespace """
-        exec cmd in self.user_ns()
+        exec cmd in self.user_ns
     
     def ev(self,expr):
         """ Evaluate python expression expr in user namespace 
         
         Returns the result of evaluation"""
-        return eval(expr,self.user_ns())
-    
-    def meta(self):
-        """ Get a session-specific data store
-        
-        Object returned by this method can be used to store
-        data that should persist through the ipython session.
-        """
-        return self.IP.meta
-    
-    def getdb(self):
-        """ Return a handle to persistent dict-like database
+        return eval(expr,self.user_ns)
         
-        Return a PickleShareDB object.
-        """
-        return self.IP.db
     def runlines(self,lines):
         """ Run the specified lines in interpreter, honoring ipython directives.
         
         This allows %magic and !shell escape notations.
         
         Takes either all lines in one string or list of lines.
         """
         if isinstance(lines,basestring):
             self.IP.runlines(lines)
         else:
             self.IP.runlines('\n'.join(lines))
 
+    def to_user_ns(self,*vars):
+        """Inject a group of variables into the IPython user namespace.
+
+        Inputs:
+
+         - *vars: one or more variables from the caller's namespace to be put
+         into the interactive IPython namespace.  The arguments can be given
+         in one of two forms, but ALL arguments must follow the same
+         convention (the first is checked and the rest are assumed to follow
+         it):
+         
+           a) All strings, naming variables in the caller.  These names are
+           evaluated in the caller's frame and put in, with the same name, in
+           the IPython namespace.
+
+           b) Pairs of (name, value), where the name is a string (a valid
+           python identifier).  In this case, the value is put into the
+           IPython namespace labeled by the given name.  This allows you to
+           rename your local variables so they don't collide with other names
+           you may already be using globally, or elsewhere and which you also
+           want to propagate.
+
+
+        This utility routine is meant to ease interactive debugging work,
+        where you want to easily propagate some internal variable in your code
+        up to the interactive namespace for further exploration.
+
+        When you run code via %run, globals in your script become visible at
+        the interactive prompt, but this doesn't happen for locals inside your
+        own functions and methods.  Yet when debugging, it is common to want
+        to explore some internal variables further at the interactive propmt.
+
+        Examples:
+
+        To use this, you first must obtain a handle on the ipython object as
+        indicated above, via:
+
+        import IPython.ipapi
+        ip = IPython.ipapi.get()
+
+        Once this is done, inside a routine foo() where you want to expose
+        variables x and y, you do the following:
+
+        def foo():
+            ...
+            x = your_computation()
+            y = something_else()
+            
+            # This pushes x and y to the interactive prompt immediately, even
+            # if this routine crashes on the next line after:
+            ip.to_user_ns('x','y')
+            ...
+            # return
+
+        The following example shows you how to rename variables to avoid
+        clashes:
+
+        def bar():
+            ...
+            x,y,z,w = foo()
+            
+            # Push these variables with different names, so they don't
+            # overwrite x and y from before
+            ip.to_user_ns(('x1',x),('y1',y),('z1',z),('w1',w))
+            # which is more conveniently written as:
+            ip.to_user_ns(*zip(('x1','y1','z1','w1'),(x,y,z,w)))
+            
+            ...
+            # return """
+
+        # print 'vars given:',vars # dbg
+        # Get the caller's frame to evaluate the given names in
+        cf = sys._getframe(1)
+        
+        # XXX fix this after Ville replies...
+        user_ns = self.user_ns
+
+        if isinstance(vars[0],basestring):
+            # assume that all variables are given as strings
+            try:
+                for name in vars:
+                    user_ns[name] = eval(name,cf.f_globals,cf.f_locals)
+            except:
+                error('could not get var. %s from %s' %
+                      (name,cf.f_code.co_name))
+
+        else:
+            # assume they are all given as pairs of name,object
+            user_ns.update(dict(vars))
+
 
 def launch_new_instance(user_ns = None):
     """ Create and start a new ipython instance.
     
     This can be called even without having an already initialized 
     ipython session running.
     
     This is also used as the egg entry point for the 'ipython' script.
     
     """
     ses = create_session(user_ns)
     ses.mainloop()
 
 
 def create_session(user_ns = None):    
     """ Creates, but does not launch an IPython session.
     
     Later on you can call obj.mainloop() on the returned object.
     
     This should *not* be run when a session exists already.
     
     """
     if user_ns is not None: 
         user_ns["__name__"] = user_ns.get("__name__",'ipy_session')
     import IPython
     return IPython.Shell.start(user_ns = user_ns)

IPython/iplib.py

@@ -1,2287 +1,2284 b''
 # -*- coding: utf-8 -*-
 """
 IPython -- An enhanced Interactive Python
 
 Requires Python 2.3 or newer.
 
 This file contains all the classes and helper functions specific to IPython.
 
-$Id: iplib.py 1277 2006-05-02 10:31:55Z walter.doerwald $
+$Id: iplib.py 1314 2006-05-19 18:24:14Z fperez $
 """
 
 #*****************************************************************************
 #       Copyright (C) 2001 Janko Hauser <[e-mail]> and
 #       Copyright (C) 2001-2006 Fernando Perez. <[e-mail]>
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #
 # Note: this code originally subclassed code.InteractiveConsole from the
 # Python standard library.  Over time, all of that class has been copied
 # verbatim here for modifications which could not be accomplished by
 # subclassing.  At this point, there are no dependencies at all on the code
 # module anymore (it is not even imported).  The Python License (sec. 2)
 # allows for this, but it's always nice to acknowledge credit where credit is
 # due.
 #*****************************************************************************
 
 #****************************************************************************
 # Modules and globals
 
-from __future__ import generators  # for 2.2 backwards-compatibility
-
 from IPython import Release
 __author__  = '%s <%s>\n%s <%s>' % \
               ( Release.authors['Janko'] + Release.authors['Fernando'] )
 __license__ = Release.license
 __version__ = Release.version
 
 # Python standard modules
 import __main__
 import __builtin__
 import StringIO
 import bdb
 import cPickle as pickle
 import codeop
 import exceptions
 import glob
 import inspect
 import keyword
 import new
 import os
 import pdb
 import pydoc
 import re
 import shutil
 import string
 import sys
 import tempfile
 import traceback
 import types
 import pickleshare
 
 from pprint import pprint, pformat
 
 # IPython's own modules
 import IPython
 from IPython import OInspect,PyColorize,ultraTB
 from IPython.ColorANSI import ColorScheme,ColorSchemeTable  # too long names
 from IPython.FakeModule import FakeModule
 from IPython.Itpl import Itpl,itpl,printpl,ItplNS,itplns
 from IPython.Logger import Logger
 from IPython.Magic import Magic
 from IPython.Prompts import CachedOutput
 from IPython.ipstruct import Struct
 from IPython.background_jobs import BackgroundJobManager
 from IPython.usage import cmd_line_usage,interactive_usage
 from IPython.genutils import *
 import IPython.ipapi
 
 # Globals
 
 # store the builtin raw_input globally, and use this always, in case user code
 # overwrites it (like wx.py.PyShell does)
 raw_input_original = raw_input
 
 # compiled regexps for autoindent management
 dedent_re = re.compile(r'^\s+raise|^\s+return|^\s+pass')
 
 
 #****************************************************************************
 # Some utility function definitions
 
 ini_spaces_re = re.compile(r'^(\s+)')
 
 def num_ini_spaces(strng):
     """Return the number of initial spaces in a string"""
 
     ini_spaces = ini_spaces_re.match(strng)
     if ini_spaces:
         return ini_spaces.end()
     else:
         return 0
 
 def softspace(file, newvalue):
     """Copied from code.py, to remove the dependency"""
 
     oldvalue = 0
     try:
         oldvalue = file.softspace
     except AttributeError:
         pass
     try:
         file.softspace = newvalue
     except (AttributeError, TypeError):
         # "attribute-less object" or "read-only attributes"
         pass
     return oldvalue
 
 
 #****************************************************************************
 # Local use exceptions
 class SpaceInInput(exceptions.Exception): pass
 
 
 #****************************************************************************
 # Local use classes
 class Bunch: pass
 
 class Undefined: pass
 
 class InputList(list):
     """Class to store user input.
 
     It's basically a list, but slices return a string instead of a list, thus
     allowing things like (assuming 'In' is an instance):
 
     exec In[4:7]
 
     or
 
     exec In[5:9] + In[14] + In[21:25]"""
 
     def __getslice__(self,i,j):
         return ''.join(list.__getslice__(self,i,j))
 
 class SyntaxTB(ultraTB.ListTB):
     """Extension which holds some state: the last exception value"""
 
     def __init__(self,color_scheme = 'NoColor'):
         ultraTB.ListTB.__init__(self,color_scheme)
         self.last_syntax_error = None
 
     def __call__(self, etype, value, elist):
         self.last_syntax_error = value
         ultraTB.ListTB.__call__(self,etype,value,elist)
 
     def clear_err_state(self):
         """Return the current error state and clear it"""
         e = self.last_syntax_error
         self.last_syntax_error = None
         return e
 
 #****************************************************************************
 # Main IPython class
 
 # FIXME: the Magic class is a mixin for now, and will unfortunately remain so
 # until a full rewrite is made.  I've cleaned all cross-class uses of
 # attributes and methods, but too much user code out there relies on the
 # equlity %foo == __IP.magic_foo, so I can't actually remove the mixin usage.
 #
 # But at least now, all the pieces have been separated and we could, in
 # principle, stop using the mixin.  This will ease the transition to the
 # chainsaw branch.
 
 # For reference, the following is the list of 'self.foo' uses in the Magic
 # class as of 2005-12-28.  These are names we CAN'T use in the main ipython
 # class, to prevent clashes.
 
 # ['self.__class__', 'self.__dict__', 'self._inspect', 'self._ofind',
 #  'self.arg_err', 'self.extract_input', 'self.format_', 'self.lsmagic',
 #  'self.magic_', 'self.options_table', 'self.parse', 'self.shell',
 #  'self.value']
 
 class InteractiveShell(object,Magic):
     """An enhanced console for Python."""
 
     # class attribute to indicate whether the class supports threads or not.
     # Subclasses with thread support should override this as needed.
     isthreaded = False
 
     def __init__(self,name,usage=None,rc=Struct(opts=None,args=None),
                  user_ns = None,user_global_ns=None,banner2='',
                  custom_exceptions=((),None),embedded=False):
 
         
         # log system
         self.logger = Logger(self,logfname='ipython_log.py',logmode='rotate')
 
-        # Produce a public API instance
-
-        self.api = IPython.ipapi.IPApi(self)
-        
         # some minimal strict typechecks.  For some core data structures, I
         # want actual basic python types, not just anything that looks like
         # one.  This is especially true for namespaces.
         for ns in (user_ns,user_global_ns):
             if ns is not None and type(ns) != types.DictType:
                 raise TypeError,'namespace must be a dictionary'
 
         # Job manager (for jobs run as background threads)
         self.jobs = BackgroundJobManager()
 
-        # track which builtins we add, so we can clean up later
-        self.builtins_added = {}
-        # This method will add the necessary builtins for operation, but
-        # tracking what it did via the builtins_added dict.
-        self.add_builtins()
-
         # Do the intuitively correct thing for quit/exit: we remove the
         # builtins if they exist, and our own magics will deal with this
         try:
             del __builtin__.exit, __builtin__.quit
         except AttributeError:
             pass
 
         # Store the actual shell's name
         self.name = name
 
         # We need to know whether the instance is meant for embedding, since
         # global/local namespaces need to be handled differently in that case
         self.embedded = embedded
 
         # command compiler
         self.compile = codeop.CommandCompiler()
 
         # User input buffer
         self.buffer = []
 
         # Default name given in compilation of code
         self.filename = '<ipython console>'
 
         # Make an empty namespace, which extension writers can rely on both
         # existing and NEVER being used by ipython itself.  This gives them a
         # convenient location for storing additional information and state
         # their extensions may require, without fear of collisions with other
         # ipython names that may develop later.
         self.meta = Struct()
 
         # Create the namespace where the user will operate.  user_ns is
         # normally the only one used, and it is passed to the exec calls as
         # the locals argument.  But we do carry a user_global_ns namespace
         # given as the exec 'globals' argument,  This is useful in embedding
         # situations where the ipython shell opens in a context where the
         # distinction between locals and globals is meaningful.
 
         # FIXME. For some strange reason, __builtins__ is showing up at user
         # level as a dict instead of a module. This is a manual fix, but I
         # should really track down where the problem is coming from. Alex
         # Schmolck reported this problem first.
 
         # A useful post by Alex Martelli on this topic:
         # Re: inconsistent value from __builtins__
         # Von: Alex Martelli <[e-mail]>
         # Datum: Freitag 01 Oktober 2004 04:45:34 nachmittags/abends
         # Gruppen: comp.lang.python
 
         # Michael Hohn <[e-mail]> wrote:
         # > >>> print type(builtin_check.get_global_binding('__builtins__'))
         # > <type 'dict'>
         # > >>> print type(__builtins__)
         # > <type 'module'>
         # > Is this difference in return value intentional?
 
         # Well, it's documented that '__builtins__' can be either a dictionary
         # or a module, and it's been that way for a long time. Whether it's
         # intentional (or sensible), I don't know. In any case, the idea is
         # that if you need to access the built-in namespace directly, you
         # should start with "import __builtin__" (note, no 's') which will
         # definitely give you a module. Yeah, it's somewhat confusing:-(.
         
         if user_ns is None:
             # Set __name__ to __main__ to better match the behavior of the
             # normal interpreter.
             user_ns = {'__name__'     :'__main__',
                        '__builtins__' : __builtin__,
                        }
             
         if user_global_ns is None:
             user_global_ns = {}
 
         # Assign namespaces
         # This is the namespace where all normal user variables live
         self.user_ns = user_ns
         # Embedded instances require a separate namespace for globals.
         # Normally this one is unused by non-embedded instances.
         self.user_global_ns = user_global_ns
         # A namespace to keep track of internal data structures to prevent
         # them from cluttering user-visible stuff.  Will be updated later
         self.internal_ns = {}
 
         # Namespace of system aliases.  Each entry in the alias
         # table must be a 2-tuple of the form (N,name), where N is the number
         # of positional arguments of the alias.
         self.alias_table = {}
 
         # A table holding all the namespaces IPython deals with, so that
         # introspection facilities can search easily.
         self.ns_table = {'user':user_ns,
                          'user_global':user_global_ns,
                          'alias':self.alias_table,
                          'internal':self.internal_ns,
                          'builtin':__builtin__.__dict__
                          }
 
         # The user namespace MUST have a pointer to the shell itself.
         self.user_ns[name] = self
 
         # We need to insert into sys.modules something that looks like a
         # module but which accesses the IPython namespace, for shelve and
         # pickle to work interactively. Normally they rely on getting
         # everything out of __main__, but for embedding purposes each IPython
         # instance has its own private namespace, so we can't go shoving
         # everything into __main__.
 
         # note, however, that we should only do this for non-embedded
         # ipythons, which really mimic the __main__.__dict__ with their own
         # namespace.  Embedded instances, on the other hand, should not do
         # this because they need to manage the user local/global namespaces
         # only, but they live within a 'normal' __main__ (meaning, they
         # shouldn't overtake the execution environment of the script they're
         # embedded in).
 
         if not embedded:
             try:
                 main_name = self.user_ns['__name__']
             except KeyError:
                 raise KeyError,'user_ns dictionary MUST have a "__name__" key'
             else:
                 #print "pickle hack in place"  # dbg
                 #print 'main_name:',main_name # dbg
                 sys.modules[main_name] = FakeModule(self.user_ns)
 
         # List of input with multi-line handling.
         # Fill its zero entry, user counter starts at 1
         self.input_hist = InputList(['\n'])
         # This one will hold the 'raw' input history, without any
         # pre-processing.  This will allow users to retrieve the input just as
         # it was exactly typed in by the user, with %hist -r.
         self.input_hist_raw = InputList(['\n'])
 
         # list of visited directories
         try:
             self.dir_hist = [os.getcwd()]
         except IOError, e:
             self.dir_hist = []
 
         # dict of output history
         self.output_hist = {}
 
         # dict of things NOT to alias (keywords, builtins and some magics)
         no_alias = {}
         no_alias_magics = ['cd','popd','pushd','dhist','alias','unalias']
         for key in keyword.kwlist + no_alias_magics:
             no_alias[key] = 1
         no_alias.update(__builtin__.__dict__)
         self.no_alias = no_alias
                 
         # make global variables for user access to these
         self.user_ns['_ih'] = self.input_hist
         self.user_ns['_oh'] = self.output_hist
         self.user_ns['_dh'] = self.dir_hist
 
         # user aliases to input and output histories
         self.user_ns['In']  = self.input_hist
         self.user_ns['Out'] = self.output_hist
 
         # Object variable to store code object waiting execution.  This is
         # used mainly by the multithreaded shells, but it can come in handy in
         # other situations.  No need to use a Queue here, since it's a single
         # item which gets cleared once run.
         self.code_to_run = None
         
         # escapes for automatic behavior on the command line
         self.ESC_SHELL  = '!'
         self.ESC_HELP   = '?'
         self.ESC_MAGIC  = '%'
         self.ESC_QUOTE  = ','
         self.ESC_QUOTE2 = ';'
         self.ESC_PAREN  = '/'
 
         # And their associated handlers
         self.esc_handlers = {self.ESC_PAREN  : self.handle_auto,
                              self.ESC_QUOTE  : self.handle_auto,
                              self.ESC_QUOTE2 : self.handle_auto,
                              self.ESC_MAGIC  : self.handle_magic,
                              self.ESC_HELP   : self.handle_help,
                              self.ESC_SHELL  : self.handle_shell_escape,
                              }
 
         # class initializations
         Magic.__init__(self,self)
 
         # Python source parser/formatter for syntax highlighting
         pyformat = PyColorize.Parser().format
         self.pycolorize = lambda src: pyformat(src,'str',self.rc['colors'])
 
         # hooks holds pointers used for user-side customizations
         self.hooks = Struct()
         
         # Set all default hooks, defined in the IPython.hooks module.
         hooks = IPython.hooks
         for hook_name in hooks.__all__:
             # default hooks have priority 100, i.e. low; user hooks should have 0-100 priority
             self.set_hook(hook_name,getattr(hooks,hook_name), 100)
             #print "bound hook",hook_name
 
         # Flag to mark unconditional exit
         self.exit_now = False
 
         self.usage_min =  """\
         An enhanced console for Python.
         Some of its features are:
         - Readline support if the readline library is present.
         - Tab completion in the local namespace.
         - Logging of input, see command-line options.
         - System shell escape via ! , eg !ls.
         - Magic commands, starting with a % (like %ls, %pwd, %cd, etc.)
         - Keeps track of locally defined variables via %who, %whos.
         - Show object information with a ? eg ?x or x? (use ?? for more info).
         """
         if usage: self.usage = usage
         else: self.usage = self.usage_min
 
         # Storage
         self.rc = rc   # This will hold all configuration information
         self.pager = 'less'
         # temporary files used for various purposes.  Deleted at exit.
         self.tempfiles = []
 
         # Keep track of readline usage (later set by init_readline)
         self.has_readline = False
 
         # template for logfile headers.  It gets resolved at runtime by the
         # logstart method.
         self.loghead_tpl = \
 """#log# Automatic Logger file. *** THIS MUST BE THE FIRST LINE ***
 #log# DO NOT CHANGE THIS LINE OR THE TWO BELOW
 #log# opts = %s
 #log# args = %s
 #log# It is safe to make manual edits below here.
 #log#-----------------------------------------------------------------------
 """
         # for pushd/popd management
         try:
             self.home_dir = get_home_dir()
         except HomeDirError,msg:
             fatal(msg)
 
         self.dir_stack = [os.getcwd().replace(self.home_dir,'~')]
 
         # Functions to call the underlying shell.
 
         # utility to expand user variables via Itpl
         self.var_expand = lambda cmd: str(ItplNS(cmd.replace('#','\#'),
                                                  self.user_ns))
         # The first is similar to os.system, but it doesn't return a value,
         # and it allows interpolation of variables in the user's namespace.
         self.system = lambda cmd: shell(self.var_expand(cmd),
                                         header='IPython system call: ',
                                         verbose=self.rc.system_verbose)
         # These are for getoutput and getoutputerror:
         self.getoutput = lambda cmd: \
                          getoutput(self.var_expand(cmd),
                                    header='IPython system call: ',
                                    verbose=self.rc.system_verbose)
         self.getoutputerror = lambda cmd: \
                               getoutputerror(str(ItplNS(cmd.replace('#','\#'),
                                                         self.user_ns)),
                                              header='IPython system call: ',
                                              verbose=self.rc.system_verbose)
  
         # RegExp for splitting line contents into pre-char//first
         # word-method//rest.  For clarity, each group in on one line.
 
         # WARNING: update the regexp if the above escapes are changed, as they
         # are hardwired in.
 
         # Don't get carried away with trying to make the autocalling catch too
         # much:  it's better to be conservative rather than to trigger hidden
         # evals() somewhere and end up causing side effects.
 
         self.line_split = re.compile(r'^([\s*,;/])'
                                      r'([\?\w\.]+\w*\s*)'
                                      r'(\(?.*$)')
 
         # Original re, keep around for a while in case changes break something
         #self.line_split = re.compile(r'(^[\s*!\?%,/]?)'
         #                             r'(\s*[\?\w\.]+\w*\s*)'
         #                             r'(\(?.*$)')
 
         # RegExp to identify potential function names
         self.re_fun_name = re.compile(r'[a-zA-Z_]([a-zA-Z0-9_.]*) *$')
 
         # RegExp to exclude strings with this start from autocalling.  In
         # particular, all binary operators should be excluded, so that if foo
         # is callable, foo OP bar doesn't become foo(OP bar), which is
         # invalid.  The characters '!=()' don't need to be checked for, as the
         # _prefilter routine explicitely does so, to catch direct calls and
         # rebindings of existing names.
 
         # Warning: the '-' HAS TO BE AT THE END of the first group, otherwise
         # it affects the rest of the group in square brackets.
         self.re_exclude_auto = re.compile(r'^[<>,&^\|\*/\+-]'
                                           '|^is |^not |^in |^and |^or ')
 
         # try to catch also methods for stuff in lists/tuples/dicts: off
         # (experimental). For this to work, the line_split regexp would need
         # to be modified so it wouldn't break things at '['. That line is
         # nasty enough that I shouldn't change it until I can test it _well_.
         #self.re_fun_name = re.compile (r'[a-zA-Z_]([a-zA-Z0-9_.\[\]]*) ?$')
 
         # keep track of where we started running (mainly for crash post-mortem)
         self.starting_dir = os.getcwd()
 
         # Various switches which can be set
         self.CACHELENGTH = 5000  # this is cheap, it's just text
         self.BANNER = "Python %(version)s on %(platform)s\n" % sys.__dict__
         self.banner2 = banner2
 
         # TraceBack handlers:
 
         # Syntax error handler.
         self.SyntaxTB = SyntaxTB(color_scheme='NoColor')
         
         # The interactive one is initialized with an offset, meaning we always
         # want to remove the topmost item in the traceback, which is our own
         # internal code. Valid modes: ['Plain','Context','Verbose']
         self.InteractiveTB = ultraTB.AutoFormattedTB(mode = 'Plain',
                                                      color_scheme='NoColor',
                                                      tb_offset = 1)
 
         # IPython itself shouldn't crash. This will produce a detailed
         # post-mortem if it does.  But we only install the crash handler for
         # non-threaded shells, the threaded ones use a normal verbose reporter
         # and lose the crash handler.  This is because exceptions in the main
         # thread (such as in GUI code) propagate directly to sys.excepthook,
         # and there's no point in printing crash dumps for every user exception.
         if self.isthreaded:
             sys.excepthook = ultraTB.FormattedTB()
         else:
             from IPython import CrashHandler
             sys.excepthook = CrashHandler.CrashHandler(self)
 
         # The instance will store a pointer to this, so that runtime code
         # (such as magics) can access it.  This is because during the
         # read-eval loop, it gets temporarily overwritten (to deal with GUI
         # frameworks).
         self.sys_excepthook = sys.excepthook
 
         # and add any custom exception handlers the user may have specified
         self.set_custom_exc(*custom_exceptions)
 
         # Object inspector
         self.inspector = OInspect.Inspector(OInspect.InspectColors,
                                             PyColorize.ANSICodeColors,
                                             'NoColor')
         # indentation management
         self.autoindent = False
         self.indent_current_nsp = 0
 
         # Make some aliases automatically
         # Prepare list of shell aliases to auto-define
         if os.name == 'posix':
             auto_alias = ('mkdir mkdir', 'rmdir rmdir',
                           'mv mv -i','rm rm -i','cp cp -i',
                           'cat cat','less less','clear clear',
                           # a better ls
                           'ls ls -F',
                           # long ls
                           'll ls -lF',
                           # color ls
                           'lc ls -F -o --color',
                           # ls normal files only
                           'lf ls -F -o --color %l | grep ^-',
                           # ls symbolic links
                           'lk ls -F -o --color %l | grep ^l',
                           # directories or links to directories,
                           'ldir ls -F -o --color %l | grep /$',
                           # things which are executable
                           'lx ls -F -o --color %l | grep ^-..x',
                           )
         elif os.name in ['nt','dos']:
             auto_alias = ('dir dir /on', 'ls dir /on',
                           'ddir dir /ad /on', 'ldir dir /ad /on',
                           'mkdir mkdir','rmdir rmdir','echo echo',
                           'ren ren','cls cls','copy copy')
         else:
             auto_alias = ()
         self.auto_alias = map(lambda s:s.split(None,1),auto_alias)
         # Call the actual (public) initializer
         self.init_auto_alias()
+
+        # Produce a public API instance
+        self.api = IPython.ipapi.IPApi(self)
+
+        # track which builtins we add, so we can clean up later
+        self.builtins_added = {}
+        # This method will add the necessary builtins for operation, but
+        # tracking what it did via the builtins_added dict.
+        self.add_builtins()
+
     # end __init__
 
     def pre_config_initialization(self):
         """Pre-configuration init method
 
         This is called before the configuration files are processed to
         prepare the services the config files might need.
         
         self.rc already has reasonable default values at this point.
         """
         rc = self.rc
         
         self.db = pickleshare.PickleShareDB(rc.ipythondir + "/db")
 
-    
     def post_config_initialization(self):
         """Post configuration init method
 
         This is called after the configuration files have been processed to
         'finalize' the initialization."""
 
         rc = self.rc
         
         # Load readline proper
         if rc.readline:
             self.init_readline()
 
         # local shortcut, this is used a LOT
         self.log = self.logger.log
 
         # Initialize cache, set in/out prompts and printing system
         self.outputcache = CachedOutput(self,
                                         rc.cache_size,
                                         rc.pprint,
                                         input_sep = rc.separate_in,
                                         output_sep = rc.separate_out,
                                         output_sep2 = rc.separate_out2,
                                         ps1 = rc.prompt_in1,
                                         ps2 = rc.prompt_in2,
                                         ps_out = rc.prompt_out,
                                         pad_left = rc.prompts_pad_left)
 
         # user may have over-ridden the default print hook:
         try:
             self.outputcache.__class__.display = self.hooks.display
         except AttributeError:
             pass
 
         # I don't like assigning globally to sys, because it means when embedding
         # instances, each embedded instance overrides the previous choice. But
         # sys.displayhook seems to be called internally by exec, so I don't see a
         # way around it.
         sys.displayhook = self.outputcache
 
         # Set user colors (don't do it in the constructor above so that it
         # doesn't crash if colors option is invalid)
         self.magic_colors(rc.colors)
 
         # Set calling of pdb on exceptions
         self.call_pdb = rc.pdb
 
         # Load user aliases
         for alias in rc.alias:
             self.magic_alias(alias)
         self.hooks.late_startup_hook()
         
         for batchfile in [path(arg) for arg in self.rc.args 
             if arg.lower().endswith('.ipy')]:
             if not batchfile.isfile():
                 print "No such batch file:", batchfile
                 continue
             self.api.runlines(batchfile.text())
 
     def add_builtins(self):
         """Store ipython references into the builtin namespace.
 
         Some parts of ipython operate via builtins injected here, which hold a
         reference to IPython itself."""
 
         # TODO: deprecate all except _ip; 'jobs' should be installed 
         # by an extension and the rest are under _ip, ipalias is redundant
         builtins_new  = dict(__IPYTHON__ = self,
                              ip_set_hook = self.set_hook, 
                              jobs = self.jobs,
                              ipmagic = self.ipmagic,  
                              ipalias = self.ipalias,  
                              ipsystem = self.ipsystem,
                              _ip = self.api
                              )
         for biname,bival in builtins_new.items():
             try:
                 # store the orignal value so we can restore it
                 self.builtins_added[biname] =  __builtin__.__dict__[biname]
             except KeyError:
                 # or mark that it wasn't defined, and we'll just delete it at
                 # cleanup
                 self.builtins_added[biname] = Undefined
             __builtin__.__dict__[biname] = bival
             
         # Keep in the builtins a flag for when IPython is active.  We set it
         # with setdefault so that multiple nested IPythons don't clobber one
         # another.  Each will increase its value by one upon being activated,
         # which also gives us a way to determine the nesting level.
         __builtin__.__dict__.setdefault('__IPYTHON__active',0)
 
     def clean_builtins(self):
         """Remove any builtins which might have been added by add_builtins, or
         restore overwritten ones to their previous values."""
         for biname,bival in self.builtins_added.items():
             if bival is Undefined:
                 del __builtin__.__dict__[biname]
             else:
                 __builtin__.__dict__[biname] = bival
         self.builtins_added.clear()
     
     def set_hook(self,name,hook, priority = 50):
         """set_hook(name,hook) -> sets an internal IPython hook.
 
         IPython exposes some of its internal API as user-modifiable hooks.  By
         adding your function to one of these hooks, you can modify IPython's 
         behavior to call at runtime your own routines."""
 
         # At some point in the future, this should validate the hook before it
         # accepts it.  Probably at least check that the hook takes the number
         # of args it's supposed to.
         dp = getattr(self.hooks, name, None)
         if name not in IPython.hooks.__all__:
             print "Warning! Hook '%s' is not one of %s" % (name, IPython.hooks.__all__ )
         if not dp:
             dp = IPython.hooks.CommandChainDispatcher()
         
         f = new.instancemethod(hook,self,self.__class__)
         try:
             dp.add(f,priority)
         except AttributeError:
             # it was not commandchain, plain old func - replace
             dp = f
 
         setattr(self.hooks,name, dp)
         
         
         #setattr(self.hooks,name,new.instancemethod(hook,self,self.__class__))
 
     def set_custom_exc(self,exc_tuple,handler):
         """set_custom_exc(exc_tuple,handler)
 
         Set a custom exception handler, which will be called if any of the
         exceptions in exc_tuple occur in the mainloop (specifically, in the
         runcode() method.
 
         Inputs:
 
           - exc_tuple: a *tuple* of valid exceptions to call the defined
           handler for.  It is very important that you use a tuple, and NOT A
           LIST here, because of the way Python's except statement works.  If
           you only want to trap a single exception, use a singleton tuple:
 
             exc_tuple == (MyCustomException,)
 
           - handler: this must be defined as a function with the following
           basic interface: def my_handler(self,etype,value,tb).
 
           This will be made into an instance method (via new.instancemethod)
           of IPython itself, and it will be called if any of the exceptions
           listed in the exc_tuple are caught.  If the handler is None, an
           internal basic one is used, which just prints basic info.
 
         WARNING: by putting in your own exception handler into IPython's main
         execution loop, you run a very good chance of nasty crashes.  This
         facility should only be used if you really know what you are doing."""
 
         assert type(exc_tuple)==type(()) , \
                "The custom exceptions must be given AS A TUPLE."
 
         def dummy_handler(self,etype,value,tb):
             print '*** Simple custom exception handler ***'
             print 'Exception type :',etype
             print 'Exception value:',value
             print 'Traceback      :',tb
             print 'Source code    :','\n'.join(self.buffer)
 
         if handler is None: handler = dummy_handler
 
         self.CustomTB = new.instancemethod(handler,self,self.__class__)
         self.custom_exceptions = exc_tuple
 
     def set_custom_completer(self,completer,pos=0):
         """set_custom_completer(completer,pos=0)
 
         Adds a new custom completer function.
 
         The position argument (defaults to 0) is the index in the completers
         list where you want the completer to be inserted."""
 
         newcomp = new.instancemethod(completer,self.Completer,
                                      self.Completer.__class__)
         self.Completer.matchers.insert(pos,newcomp)
 
     def _get_call_pdb(self):
         return self._call_pdb
 
     def _set_call_pdb(self,val):
 
         if val not in (0,1,False,True):
             raise ValueError,'new call_pdb value must be boolean'
 
         # store value in instance
         self._call_pdb = val
 
         # notify the actual exception handlers
         self.InteractiveTB.call_pdb = val
         if self.isthreaded:
             try:
                 self.sys_excepthook.call_pdb = val
             except:
                 warn('Failed to activate pdb for threaded exception handler')
 
     call_pdb = property(_get_call_pdb,_set_call_pdb,None,
                         'Control auto-activation of pdb at exceptions')
  
 
     # These special functions get installed in the builtin namespace, to
     # provide programmatic (pure python) access to magics, aliases and system
     # calls.  This is important for logging, user scripting, and more.
 
     # We are basically exposing, via normal python functions, the three
     # mechanisms in which ipython offers special call modes (magics for
     # internal control, aliases for direct system access via pre-selected
     # names, and !cmd for calling arbitrary system commands).
 
     def ipmagic(self,arg_s):
         """Call a magic function by name.
 
         Input: a string containing the name of the magic function to call and any
         additional arguments to be passed to the magic.
 
         ipmagic('name -opt foo bar') is equivalent to typing at the ipython
         prompt:
 
         In[1]: %name -opt foo bar
 
         To call a magic without arguments, simply use ipmagic('name').
 
         This provides a proper Python function to call IPython's magics in any
         valid Python code you can type at the interpreter, including loops and
         compound statements.  It is added by IPython to the Python builtin
         namespace upon initialization."""
 
         args = arg_s.split(' ',1)
         magic_name = args[0]
         magic_name = magic_name.lstrip(self.ESC_MAGIC)
 
         try:
             magic_args = args[1]
         except IndexError:
             magic_args = ''
         fn = getattr(self,'magic_'+magic_name,None)
         if fn is None:
             error("Magic function `%s` not found." % magic_name)
         else:
             magic_args = self.var_expand(magic_args)
             return fn(magic_args)
 
     def ipalias(self,arg_s):
         """Call an alias by name.
 
         Input: a string containing the name of the alias to call and any
         additional arguments to be passed to the magic.
 
         ipalias('name -opt foo bar') is equivalent to typing at the ipython
         prompt:
 
         In[1]: name -opt foo bar
 
         To call an alias without arguments, simply use ipalias('name').
 
         This provides a proper Python function to call IPython's aliases in any
         valid Python code you can type at the interpreter, including loops and
         compound statements.  It is added by IPython to the Python builtin
         namespace upon initialization."""
 
         args = arg_s.split(' ',1)
         alias_name = args[0]
         try:
             alias_args = args[1]
         except IndexError:
             alias_args = ''
         if alias_name in self.alias_table:
             self.call_alias(alias_name,alias_args)
         else:
             error("Alias `%s` not found." % alias_name)
 
     def ipsystem(self,arg_s):
         """Make a system call, using IPython."""
 
         self.system(arg_s)
 
     def complete(self,text):
         """Return a sorted list of all possible completions on text.
 
         Inputs:
 
           - text: a string of text to be completed on.
 
         This is a wrapper around the completion mechanism, similar to what
         readline does at the command line when the TAB key is hit.  By
         exposing it as a method, it can be used by other non-readline
         environments (such as GUIs) for text completion.
 
         Simple usage example:
 
         In [1]: x = 'hello'
 
         In [2]: __IP.complete('x.l')
         Out[2]: ['x.ljust', 'x.lower', 'x.lstrip']"""
         
         complete = self.Completer.complete
         state = 0
         # use a dict so we get unique keys, since ipyhton's multiple
         # completers can return duplicates.
         comps = {}
         while True:
             newcomp = complete(text,state)
             if newcomp is None:
                 break
             comps[newcomp] = 1
             state += 1
         outcomps = comps.keys()
         outcomps.sort()
         return outcomps
         
     def set_completer_frame(self, frame=None):
         if frame:
             self.Completer.namespace = frame.f_locals
             self.Completer.global_namespace = frame.f_globals
         else:
             self.Completer.namespace = self.user_ns
             self.Completer.global_namespace = self.user_global_ns
 
     def init_auto_alias(self):
         """Define some aliases automatically.
 
         These are ALL parameter-less aliases"""
 
         for alias,cmd in self.auto_alias:
             self.alias_table[alias] = (0,cmd)
 
     def alias_table_validate(self,verbose=0):
         """Update information about the alias table.
 
         In particular, make sure no Python keywords/builtins are in it."""
 
         no_alias = self.no_alias
         for k in self.alias_table.keys():
             if k in no_alias:
                 del self.alias_table[k]
                 if verbose:
                     print ("Deleting alias <%s>, it's a Python "
                            "keyword or builtin." % k)
     
     def set_autoindent(self,value=None):
         """Set the autoindent flag, checking for readline support.
 
         If called with no arguments, it acts as a toggle."""
 
         if not self.has_readline:
             if os.name == 'posix':
                 warn("The auto-indent feature requires the readline library")
             self.autoindent = 0
             return
         if value is None:
             self.autoindent = not self.autoindent
         else:
             self.autoindent = value
 
     def rc_set_toggle(self,rc_field,value=None):
         """Set or toggle a field in IPython's rc config. structure.
 
         If called with no arguments, it acts as a toggle.
 
         If called with a non-existent field, the resulting AttributeError
         exception will propagate out."""
 
         rc_val = getattr(self.rc,rc_field)
         if value is None:
             value = not rc_val
         setattr(self.rc,rc_field,value)
 
     def user_setup(self,ipythondir,rc_suffix,mode='install'):
         """Install the user configuration directory.
 
         Can be called when running for the first time or to upgrade the user's
         .ipython/ directory with the mode parameter. Valid modes are 'install'
         and 'upgrade'."""
 
         def wait():
             try:
                 raw_input("Please press <RETURN> to start IPython.")
             except EOFError:
                 print >> Term.cout
             print '*'*70
 
         cwd = os.getcwd()  # remember where we started
         glb = glob.glob
         print '*'*70
         if mode == 'install':
             print \
 """Welcome to IPython. I will try to create a personal configuration directory
 where you can customize many aspects of IPython's functionality in:\n"""
         else:
             print 'I am going to upgrade your configuration in:'
 
         print ipythondir
 
         rcdirend = os.path.join('IPython','UserConfig')
         cfg = lambda d: os.path.join(d,rcdirend)
         try:
             rcdir = filter(os.path.isdir,map(cfg,sys.path))[0]
         except IOError:
             warning = """
 Installation error. IPython's directory was not found.
 
 Check the following:
 
 The ipython/IPython directory should be in a directory belonging to your
 PYTHONPATH environment variable (that is, it should be in a directory
 belonging to sys.path). You can copy it explicitly there or just link to it.
 
 IPython will proceed with builtin defaults.
 """
             warn(warning)
             wait()
             return
 
         if mode == 'install':
             try:
                 shutil.copytree(rcdir,ipythondir)
                 os.chdir(ipythondir)
                 rc_files = glb("ipythonrc*")
                 for rc_file in rc_files:
                     os.rename(rc_file,rc_file+rc_suffix)
             except:
                 warning = """
 
 There was a problem with the installation:
 %s
 Try to correct it or contact the developers if you think it's a bug.
 IPython will proceed with builtin defaults.""" % sys.exc_info()[1]
                 warn(warning)
                 wait()
                 return
 
         elif mode == 'upgrade':
             try:
                 os.chdir(ipythondir)
             except:
                 print """
 Can not upgrade: changing to directory %s failed. Details:
 %s
 """ % (ipythondir,sys.exc_info()[1])
                 wait()
                 return
             else:
                 sources = glb(os.path.join(rcdir,'[A-Za-z]*'))
                 for new_full_path in sources:
                     new_filename = os.path.basename(new_full_path)
                     if new_filename.startswith('ipythonrc'):
                         new_filename = new_filename + rc_suffix
                     # The config directory should only contain files, skip any
                     # directories which may be there (like CVS)
                     if os.path.isdir(new_full_path):
                         continue
                     if os.path.exists(new_filename):
                         old_file = new_filename+'.old'
                         if os.path.exists(old_file):
                             os.remove(old_file)
                         os.rename(new_filename,old_file)
                     shutil.copy(new_full_path,new_filename)
         else:
             raise ValueError,'unrecognized mode for install:',`mode`
 
         # Fix line-endings to those native to each platform in the config
         # directory.
         try:
             os.chdir(ipythondir)
         except:
             print """
 Problem: changing to directory %s failed.
 Details:
 %s
 
 Some configuration files may have incorrect line endings.  This should not
 cause any problems during execution.  """ % (ipythondir,sys.exc_info()[1])
             wait()
         else:
             for fname in glb('ipythonrc*'):
                 try:
                     native_line_ends(fname,backup=0)
                 except IOError:
                     pass
 
         if mode == 'install':
             print """
 Successful installation!
 
 Please read the sections 'Initial Configuration' and 'Quick Tips' in the
 IPython manual (there are both HTML and PDF versions supplied with the
 distribution) to make sure that your system environment is properly configured
 to take advantage of IPython's features.
 
 Important note: the configuration system has changed! The old system is
 still in place, but its setting may be partly overridden by the settings in 
 "~/.ipython/ipy_user_conf.py" config file. Please take a look at the file 
 if some of the new settings bother you. 
 
 """
         else:
             print """
 Successful upgrade!
 
 All files in your directory:
 %(ipythondir)s
 which would have been overwritten by the upgrade were backed up with a .old
 extension.  If you had made particular customizations in those files you may
 want to merge them back into the new files.""" % locals()
         wait()
         os.chdir(cwd)
         # end user_setup()
 
     def atexit_operations(self):
         """This will be executed at the time of exit.
 
         Saving of persistent data should be performed here. """
 
         #print '*** IPython exit cleanup ***' # dbg
         # input history
         self.savehist()
 
         # Cleanup all tempfiles left around
         for tfile in self.tempfiles:
             try:
                 os.unlink(tfile)
             except OSError:
                 pass
 
         # save the "persistent data" catch-all dictionary
         self.hooks.shutdown_hook()
         
     def savehist(self):
         """Save input history to a file (via readline library)."""
         try:
             self.readline.write_history_file(self.histfile)
         except:
             print 'Unable to save IPython command history to file: ' + \
                   `self.histfile`
 
     def pre_readline(self):
         """readline hook to be used at the start of each line.
 
         Currently it handles auto-indent only."""
 
         #debugx('self.indent_current_nsp','pre_readline:')
         self.readline.insert_text(self.indent_current_str())
 
     def init_readline(self):
         """Command history completion/saving/reloading."""
 
         import IPython.rlineimpl as readline
         if not readline.have_readline:
             self.has_readline = 0
             self.readline = None
             # no point in bugging windows users with this every time:
             warn('Readline services not available on this platform.')
         else:
             sys.modules['readline'] = readline
             import atexit
             from IPython.completer import IPCompleter
             self.Completer = IPCompleter(self,
                                             self.user_ns,
                                             self.user_global_ns,
                                             self.rc.readline_omit__names,
                                             self.alias_table)
 
             # Platform-specific configuration
             if os.name == 'nt':
                 self.readline_startup_hook = readline.set_pre_input_hook
             else:
                 self.readline_startup_hook = readline.set_startup_hook
 
             # Load user's initrc file (readline config)
             inputrc_name = os.environ.get('INPUTRC')
             if inputrc_name is None:
                 home_dir = get_home_dir()
                 if home_dir is not None:
                     inputrc_name = os.path.join(home_dir,'.inputrc')
             if os.path.isfile(inputrc_name):
                 try:
                     readline.read_init_file(inputrc_name)
                 except:
                     warn('Problems reading readline initialization file <%s>'
                          % inputrc_name)
             
             self.has_readline = 1
             self.readline = readline
             # save this in sys so embedded copies can restore it properly
             sys.ipcompleter = self.Completer.complete
             readline.set_completer(self.Completer.complete)
 
             # Configure readline according to user's prefs
             for rlcommand in self.rc.readline_parse_and_bind:
                 readline.parse_and_bind(rlcommand)
 
             # remove some chars from the delimiters list
             delims = readline.get_completer_delims()
             delims = delims.translate(string._idmap,
                                       self.rc.readline_remove_delims)
             readline.set_completer_delims(delims)
             # otherwise we end up with a monster history after a while:
             readline.set_history_length(1000)
             try:
                 #print '*** Reading readline history'  # dbg
                 readline.read_history_file(self.histfile)
             except IOError:
                 pass  # It doesn't exist yet.
 
             atexit.register(self.atexit_operations)
             del atexit
 
         # Configure auto-indent for all platforms
         self.set_autoindent(self.rc.autoindent)
 
     def _should_recompile(self,e):
         """Utility routine for edit_syntax_error"""
 
         if e.filename in ('<ipython console>','<input>','<string>',
                           '<console>',None):
                               
             return False
         try:
             if (self.rc.autoedit_syntax and 
                 not ask_yes_no('Return to editor to correct syntax error? '
                               '[Y/n] ','y')):
                 return False
         except EOFError:
             return False
 
         def int0(x):
             try:
                 return int(x)
             except TypeError:
                 return 0
         # always pass integer line and offset values to editor hook
         self.hooks.fix_error_editor(e.filename,
             int0(e.lineno),int0(e.offset),e.msg)
         return True
         
     def edit_syntax_error(self):
         """The bottom half of the syntax error handler called in the main loop.
 
         Loop until syntax error is fixed or user cancels.
         """
 
         while self.SyntaxTB.last_syntax_error:
             # copy and clear last_syntax_error
             err = self.SyntaxTB.clear_err_state()
             if not self._should_recompile(err):
                 return
             try:
                 # may set last_syntax_error again if a SyntaxError is raised
                 self.safe_execfile(err.filename,self.shell.user_ns)
             except:
                 self.showtraceback()
             else:
                 f = file(err.filename)
                 try:
                     sys.displayhook(f.read())
                 finally:
                     f.close()
 
     def showsyntaxerror(self, filename=None):
         """Display the syntax error that just occurred.
 
         This doesn't display a stack trace because there isn't one.
 
         If a filename is given, it is stuffed in the exception instead
         of what was there before (because Python's parser always uses
         "<string>" when reading from a string).
         """
         etype, value, last_traceback = sys.exc_info()
 
         # See note about these variables in showtraceback() below
         sys.last_type = etype
         sys.last_value = value
         sys.last_traceback = last_traceback
         
         if filename and etype is SyntaxError:
             # Work hard to stuff the correct filename in the exception
             try:
                 msg, (dummy_filename, lineno, offset, line) = value
             except:
                 # Not the format we expect; leave it alone
                 pass
             else:
                 # Stuff in the right filename
                 try:
                     # Assume SyntaxError is a class exception
                     value = SyntaxError(msg, (filename, lineno, offset, line))
                 except:
                     # If that failed, assume SyntaxError is a string
                     value = msg, (filename, lineno, offset, line)
         self.SyntaxTB(etype,value,[])
 
     def debugger(self):
         """Call the pdb debugger."""
 
         if not self.rc.pdb:
             return
         pdb.pm()
 
     def showtraceback(self,exc_tuple = None,filename=None,tb_offset=None):
         """Display the exception that just occurred."""
 
         # Though this won't be called by syntax errors in the input line,
         # there may be SyntaxError cases whith imported code.
         if exc_tuple is None:
             etype, value, tb = sys.exc_info()
         else:
             etype, value, tb = exc_tuple
         if etype is SyntaxError:
             self.showsyntaxerror(filename)
         else:
             # WARNING: these variables are somewhat deprecated and not
             # necessarily safe to use in a threaded environment, but tools
             # like pdb depend on their existence, so let's set them.  If we
             # find problems in the field, we'll need to revisit their use.
             sys.last_type = etype
             sys.last_value = value
             sys.last_traceback = tb
             
             self.InteractiveTB(etype,value,tb,tb_offset=tb_offset)
             if self.InteractiveTB.call_pdb and self.has_readline:
                 # pdb mucks up readline, fix it back
                 self.readline.set_completer(self.Completer.complete)
 
     def mainloop(self,banner=None):
         """Creates the local namespace and starts the mainloop.
 
         If an optional banner argument is given, it will override the
         internally created default banner."""
         
         if self.rc.c:  # Emulate Python's -c option
             self.exec_init_cmd()
         if banner is None:
             if not self.rc.banner:
                 banner = ''
             # banner is string? Use it directly!
             elif isinstance(self.rc.banner,basestring):
                 banner = self.rc.banner
             else:                
                 banner = self.BANNER+self.banner2
 
         self.interact(banner)
 
     def exec_init_cmd(self):
         """Execute a command given at the command line.
 
         This emulates Python's -c option."""
 
         #sys.argv = ['-c']
         self.push(self.rc.c)
 
     def embed_mainloop(self,header='',local_ns=None,global_ns=None,stack_depth=0):
         """Embeds IPython into a running python program.
 
         Input:
 
           - header: An optional header message can be specified.
 
           - local_ns, global_ns: working namespaces. If given as None, the
           IPython-initialized one is updated with __main__.__dict__, so that
           program variables become visible but user-specific configuration
           remains possible.
 
           - stack_depth: specifies how many levels in the stack to go to
           looking for namespaces (when local_ns and global_ns are None).  This
           allows an intermediate caller to make sure that this function gets
           the namespace from the intended level in the stack.  By default (0)
           it will get its locals and globals from the immediate caller.
 
         Warning: it's possible to use this in a program which is being run by
         IPython itself (via %run), but some funny things will happen (a few
         globals get overwritten). In the future this will be cleaned up, as
         there is no fundamental reason why it can't work perfectly."""
 
         # Get locals and globals from caller
         if local_ns is None or global_ns is None:
             call_frame = sys._getframe(stack_depth).f_back
 
             if local_ns is None:
                 local_ns = call_frame.f_locals
             if global_ns is None:
                 global_ns = call_frame.f_globals
 
         # Update namespaces and fire up interpreter
 
         # The global one is easy, we can just throw it in
         self.user_global_ns = global_ns
 
         # but the user/local one is tricky: ipython needs it to store internal
         # data, but we also need the locals.  We'll copy locals in the user
         # one, but will track what got copied so we can delete them at exit.
         # This is so that a later embedded call doesn't see locals from a
         # previous call (which most likely existed in a separate scope).
         local_varnames = local_ns.keys()
         self.user_ns.update(local_ns)
 
         # Patch for global embedding to make sure that things don't overwrite
         # user globals accidentally. Thanks to Richard <[e-mail]>
         # FIXME. Test this a bit more carefully (the if.. is new)
         if local_ns is None and global_ns is None:
             self.user_global_ns.update(__main__.__dict__)
 
         # make sure the tab-completer has the correct frame information, so it
         # actually completes using the frame's locals/globals
         self.set_completer_frame()
 
         # before activating the interactive mode, we need to make sure that
         # all names in the builtin namespace needed by ipython point to
         # ourselves, and not to other instances.
         self.add_builtins()
         
         self.interact(header)
         
         # now, purge out the user namespace from anything we might have added
         # from the caller's local namespace
         delvar = self.user_ns.pop
         for var in local_varnames:
             delvar(var,None)
         # and clean builtins we may have overridden
         self.clean_builtins()
 
     def interact(self, banner=None):
         """Closely emulate the interactive Python console.
 
         The optional banner argument specify the banner to print
         before the first interaction; by default it prints a banner
         similar to the one printed by the real Python interpreter,
         followed by the current class name in parentheses (so as not
         to confuse this with the real interpreter -- since it's so
         close!).
 
         """
         cprt = 'Type "copyright", "credits" or "license" for more information.'
         if banner is None:
             self.write("Python %s on %s\n%s\n(%s)\n" %
                        (sys.version, sys.platform, cprt,
                         self.__class__.__name__))
         else:
             self.write(banner)
 
         more = 0
         
         # Mark activity in the builtins
         __builtin__.__dict__['__IPYTHON__active'] += 1
 
         # exit_now is set by a call to %Exit or %Quit
         self.exit_now = False
         while not self.exit_now:
             if more:
                 prompt = self.outputcache.prompt2
                 if self.autoindent:
                     self.readline_startup_hook(self.pre_readline)
             else:
                 prompt = self.outputcache.prompt1
             try:
                 line = self.raw_input(prompt,more)
                 if self.autoindent:
                     self.readline_startup_hook(None)
             except KeyboardInterrupt:
                 self.write('\nKeyboardInterrupt\n')
                 self.resetbuffer()
                 # keep cache in sync with the prompt counter:
                 self.outputcache.prompt_count -= 1
 
                 if self.autoindent:
                     self.indent_current_nsp = 0
                 more = 0
             except EOFError:
                 if self.autoindent:
                     self.readline_startup_hook(None)
                 self.write('\n')
                 self.exit()
             except bdb.BdbQuit:
                 warn('The Python debugger has exited with a BdbQuit exception.\n'
                      'Because of how pdb handles the stack, it is impossible\n'
                      'for IPython to properly format this particular exception.\n'
                      'IPython will resume normal operation.')
             except:
                 # exceptions here are VERY RARE, but they can be triggered
                 # asynchronously by signal handlers, for example.
                 self.showtraceback()
             else:
                 more = self.push(line)
                 if (self.SyntaxTB.last_syntax_error and
                     self.rc.autoedit_syntax):
                     self.edit_syntax_error()
             
         # We are off again...
         __builtin__.__dict__['__IPYTHON__active'] -= 1
 
     def excepthook(self, etype, value, tb):
       """One more defense for GUI apps that call sys.excepthook.
 
       GUI frameworks like wxPython trap exceptions and call
       sys.excepthook themselves.  I guess this is a feature that
       enables them to keep running after exceptions that would
       otherwise kill their mainloop. This is a bother for IPython
       which excepts to catch all of the program exceptions with a try:
       except: statement.
 
       Normally, IPython sets sys.excepthook to a CrashHandler instance, so if
       any app directly invokes sys.excepthook, it will look to the user like
       IPython crashed.  In order to work around this, we can disable the
       CrashHandler and replace it with this excepthook instead, which prints a
       regular traceback using our InteractiveTB.  In this fashion, apps which
       call sys.excepthook will generate a regular-looking exception from
       IPython, and the CrashHandler will only be triggered by real IPython
       crashes.
 
       This hook should be used sparingly, only in places which are not likely
       to be true IPython errors.
       """
       self.showtraceback((etype,value,tb),tb_offset=0)
 
     def transform_alias(self, alias,rest=''):
         """ Transform alias to system command string 
         
         """
         nargs,cmd = self.alias_table[alias]
         if ' ' in cmd and os.path.isfile(cmd):
             cmd = '"%s"' % cmd
 
         # Expand the %l special to be the user's input line
         if cmd.find('%l') >= 0:
             cmd = cmd.replace('%l',rest)
             rest = ''
         if nargs==0:
             # Simple, argument-less aliases
             cmd = '%s %s' % (cmd,rest)
         else:
             # Handle aliases with positional arguments
             args = rest.split(None,nargs)
             if len(args)< nargs:
                 error('Alias <%s> requires %s arguments, %s given.' %
                       (alias,nargs,len(args)))
                 return None
             cmd = '%s %s' % (cmd % tuple(args[:nargs]),' '.join(args[nargs:]))
         # Now call the macro, evaluating in the user's namespace
 
         return cmd
         
     def call_alias(self,alias,rest=''):
         """Call an alias given its name and the rest of the line.
 
         This is only used to provide backwards compatibility for users of
         ipalias(), use of which is not recommended for anymore."""
 
         # Now call the macro, evaluating in the user's namespace
         cmd = self.transform_alias(alias, rest)
         try:
             self.system(cmd)
         except:
             self.showtraceback()
 
     def indent_current_str(self):
         """return the current level of indentation as a string"""
         return self.indent_current_nsp * ' '
 
     def autoindent_update(self,line):
         """Keep track of the indent level."""
 
         #debugx('line')
         #debugx('self.indent_current_nsp')
         if self.autoindent:
             if line:
                 inisp = num_ini_spaces(line)
                 if inisp < self.indent_current_nsp:
                     self.indent_current_nsp = inisp
 
                 if line[-1] == ':':
                     self.indent_current_nsp += 4
                 elif dedent_re.match(line):
                     self.indent_current_nsp -= 4
             else:
                 self.indent_current_nsp = 0
 
     def runlines(self,lines):
         """Run a string of one or more lines of source.
 
         This method is capable of running a string containing multiple source
         lines, as if they had been entered at the IPython prompt.  Since it
         exposes IPython's processing machinery, the given strings can contain
         magic calls (%magic), special shell access (!cmd), etc."""
 
         # We must start with a clean buffer, in case this is run from an
         # interactive IPython session (via a magic, for example).
         self.resetbuffer()
         lines = lines.split('\n')
         more = 0
         for line in lines:
             # skip blank lines so we don't mess up the prompt counter, but do
             # NOT skip even a blank line if we are in a code block (more is
             # true)
             if line or more:
                 more = self.push(self.prefilter(line,more))
                 # IPython's runsource returns None if there was an error
                 # compiling the code.  This allows us to stop processing right
                 # away, so the user gets the error message at the right place.
                 if more is None:
                     break
         # final newline in case the input didn't have it, so that the code
         # actually does get executed
         if more:
             self.push('\n')
 
     def runsource(self, source, filename='<input>', symbol='single'):
         """Compile and run some source in the interpreter.
 
         Arguments are as for compile_command().
 
         One several things can happen:
 
         1) The input is incorrect; compile_command() raised an
         exception (SyntaxError or OverflowError).  A syntax traceback
         will be printed by calling the showsyntaxerror() method.
 
         2) The input is incomplete, and more input is required;
         compile_command() returned None.  Nothing happens.
 
         3) The input is complete; compile_command() returned a code
         object.  The code is executed by calling self.runcode() (which
         also handles run-time exceptions, except for SystemExit).
 
         The return value is:
 
           - True in case 2
 
           - False in the other cases, unless an exception is raised, where
           None is returned instead.  This can be used by external callers to
           know whether to continue feeding input or not.
 
         The return value can be used to decide whether to use sys.ps1 or
         sys.ps2 to prompt the next line."""
 
         try:
             code = self.compile(source,filename,symbol)
         except (OverflowError, SyntaxError, ValueError):
             # Case 1
             self.showsyntaxerror(filename)
             return None
 
         if code is None:
             # Case 2
             return True
 
         # Case 3
         # We store the code object so that threaded shells and
         # custom exception handlers can access all this info if needed.
         # The source corresponding to this can be obtained from the
         # buffer attribute as '\n'.join(self.buffer).
         self.code_to_run = code
         # now actually execute the code object
         if self.runcode(code) == 0:
             return False
         else:
             return None
 
     def runcode(self,code_obj):
         """Execute a code object.
 
         When an exception occurs, self.showtraceback() is called to display a
         traceback.
 
         Return value: a flag indicating whether the code to be run completed
         successfully:
 
           - 0: successful execution.
           - 1: an error occurred.
         """
 
         # Set our own excepthook in case the user code tries to call it
         # directly, so that the IPython crash handler doesn't get triggered
         old_excepthook,sys.excepthook = sys.excepthook, self.excepthook
 
         # we save the original sys.excepthook in the instance, in case config
         # code (such as magics) needs access to it.
         self.sys_excepthook = old_excepthook
         outflag = 1  # happens in more places, so it's easier as default
         try:
             try:
                 # Embedded instances require separate global/local namespaces
                 # so they can see both the surrounding (local) namespace and
                 # the module-level globals when called inside another function.
                 if self.embedded:
                     exec code_obj in self.user_global_ns, self.user_ns
                 # Normal (non-embedded) instances should only have a single
                 # namespace for user code execution, otherwise functions won't
                 # see interactive top-level globals.
                 else:
                     exec code_obj in self.user_ns
             finally:
                 # Reset our crash handler in place
                 sys.excepthook = old_excepthook
         except SystemExit:
             self.resetbuffer()
             self.showtraceback()
             warn("Type exit or quit to exit IPython "
                  "(%Exit or %Quit do so unconditionally).",level=1)
         except self.custom_exceptions:
             etype,value,tb = sys.exc_info()
             self.CustomTB(etype,value,tb)
         except:
             self.showtraceback()
         else:
             outflag = 0
             if softspace(sys.stdout, 0):
                 print
         # Flush out code object which has been run (and source)
         self.code_to_run = None
         return outflag
         
     def push(self, line):
         """Push a line to the interpreter.
 
         The line should not have a trailing newline; it may have
         internal newlines.  The line is appended to a buffer and the
         interpreter's runsource() method is called with the
         concatenated contents of the buffer as source.  If this
         indicates that the command was executed or invalid, the buffer
         is reset; otherwise, the command is incomplete, and the buffer
         is left as it was after the line was appended.  The return
         value is 1 if more input is required, 0 if the line was dealt
         with in some way (this is the same as runsource()).
         """
 
         # autoindent management should be done here, and not in the
         # interactive loop, since that one is only seen by keyboard input.  We
         # need this done correctly even for code run via runlines (which uses
         # push).
 
         #print 'push line: <%s>' % line  # dbg
         self.autoindent_update(line)
 
         self.buffer.append(line)
         more = self.runsource('\n'.join(self.buffer), self.filename)
         if not more:
             self.resetbuffer()
         return more
 
     def resetbuffer(self):
         """Reset the input buffer."""
         self.buffer[:] = []
         
     def raw_input(self,prompt='',continue_prompt=False):
         """Write a prompt and read a line.
 
         The returned line does not include the trailing newline.
         When the user enters the EOF key sequence, EOFError is raised.
 
         Optional inputs:
 
           - prompt(''): a string to be printed to prompt the user.
 
           - continue_prompt(False): whether this line is the first one or a
           continuation in a sequence of inputs.
         """
 
         line = raw_input_original(prompt)
 
         # Try to be reasonably smart about not re-indenting pasted input more
         # than necessary.  We do this by trimming out the auto-indent initial
         # spaces, if the user's actual input started itself with whitespace.
         #debugx('self.buffer[-1]')
 
         if self.autoindent:
             if num_ini_spaces(line) > self.indent_current_nsp:
                 line = line[self.indent_current_nsp:]
                 self.indent_current_nsp = 0
             
         # store the unfiltered input before the user has any chance to modify
         # it.
         if line.strip():
             if continue_prompt:
                 self.input_hist_raw[-1] += '%s\n' % line
             else:
                 self.input_hist_raw.append('%s\n' % line)
 
         lineout = self.prefilter(line,continue_prompt)
         return lineout
         
     def split_user_input(self,line):
         """Split user input into pre-char, function part and rest."""
 
         lsplit = self.line_split.match(line)
         if lsplit is None:  # no regexp match returns None
             try:
                 iFun,theRest = line.split(None,1)
             except ValueError:
                 iFun,theRest = line,''
             pre = re.match('^(\s*)(.*)',line).groups()[0]
         else:
             pre,iFun,theRest = lsplit.groups()
 
         #print 'line:<%s>' % line # dbg
         #print 'pre <%s> iFun <%s> rest <%s>' % (pre,iFun.strip(),theRest) # dbg
         return pre,iFun.strip(),theRest
 
     def _prefilter(self, line, continue_prompt):
         """Calls different preprocessors, depending on the form of line."""
 
         # All handlers *must* return a value, even if it's blank ('').
 
         # Lines are NOT logged here. Handlers should process the line as
         # needed, update the cache AND log it (so that the input cache array
         # stays synced).
 
         # This function is _very_ delicate, and since it's also the one which
         # determines IPython's response to user input, it must be as efficient
         # as possible.  For this reason it has _many_ returns in it, trying
         # always to exit as quickly as it can figure out what it needs to do.
 
         # This function is the main responsible for maintaining IPython's
         # behavior respectful of Python's semantics.  So be _very_ careful if
         # making changes to anything here.
 
         #.....................................................................
         # Code begins
 
         #if line.startswith('%crash'): raise RuntimeError,'Crash now!'  # dbg
 
         # save the line away in case we crash, so the post-mortem handler can
         # record it
         self._last_input_line = line
 
         #print '***line: <%s>' % line # dbg
         
         # the input history needs to track even empty lines
         stripped = line.strip()
         
         if not stripped:
             if not continue_prompt:
                 self.outputcache.prompt_count -= 1
             return self.handle_normal(line,continue_prompt)
             #return self.handle_normal('',continue_prompt)
 
         # print '***cont',continue_prompt  # dbg
         # special handlers are only allowed for single line statements
         if continue_prompt and not self.rc.multi_line_specials:
             return self.handle_normal(line,continue_prompt)
 
 
         # For the rest, we need the structure of the input
         pre,iFun,theRest = self.split_user_input(line)
 
         # See whether any pre-existing handler can take care of it
         
         rewritten = self.hooks.input_prefilter(stripped)
         if rewritten != stripped: # ok, some prefilter did something
             rewritten = pre + rewritten  # add indentation
             return self.handle_normal(rewritten)
             
         
         
 
         #print 'pre <%s> iFun <%s> rest <%s>' % (pre,iFun,theRest)  # dbg
 
         # First check for explicit escapes in the last/first character
         handler = None
         if line[-1] == self.ESC_HELP:
             handler = self.esc_handlers.get(line[-1])  # the ? can be at the end
         if handler is None:
             # look at the first character of iFun, NOT of line, so we skip
             # leading whitespace in multiline input
             handler = self.esc_handlers.get(iFun[0:1])
         if handler is not None:
             return handler(line,continue_prompt,pre,iFun,theRest)
         # Emacs ipython-mode tags certain input lines
         if line.endswith('# PYTHON-MODE'):
             return self.handle_emacs(line,continue_prompt)
 
         # Next, check if we can automatically execute this thing
 
         # Allow ! in multi-line statements if multi_line_specials is on:
         if continue_prompt and self.rc.multi_line_specials and \
                iFun.startswith(self.ESC_SHELL):
             return self.handle_shell_escape(line,continue_prompt,
                                             pre=pre,iFun=iFun,
                                             theRest=theRest)
 
         # Let's try to find if the input line is a magic fn
         oinfo = None
         if hasattr(self,'magic_'+iFun):
             # WARNING: _ofind uses getattr(), so it can consume generators and
             # cause other side effects.
             oinfo = self._ofind(iFun) # FIXME - _ofind is part of Magic
             if oinfo['ismagic']:
                 # Be careful not to call magics when a variable assignment is
                 # being made (ls='hi', for example)
                 if self.rc.automagic and \
                        (len(theRest)==0 or theRest[0] not in '!=()<>,') and \
                        (self.rc.multi_line_specials or not continue_prompt):
                     return self.handle_magic(line,continue_prompt,
                                              pre,iFun,theRest)
                 else:
                     return self.handle_normal(line,continue_prompt)
 
         # If the rest of the line begins with an (in)equality, assginment or
         # function call, we should not call _ofind but simply execute it.
         # This avoids spurious geattr() accesses on objects upon assignment.
         #
         # It also allows users to assign to either alias or magic names true
         # python variables (the magic/alias systems always take second seat to
         # true python code).
         if theRest and theRest[0] in '!=()':
             return self.handle_normal(line,continue_prompt)
 
         if oinfo is None:
             # let's try to ensure that _oinfo is ONLY called when autocall is
             # on.  Since it has inevitable potential side effects, at least
             # having autocall off should be a guarantee to the user that no
             # weird things will happen.
 
             if self.rc.autocall:
                 oinfo = self._ofind(iFun) # FIXME - _ofind is part of Magic
             else:
                 # in this case, all that's left is either an alias or
                 # processing the line normally.
                 if iFun in self.alias_table:
                     return self.handle_alias(line,continue_prompt,
                                              pre,iFun,theRest)
                  
                 else:
                     return self.handle_normal(line,continue_prompt)
         
         if not oinfo['found']:
             return self.handle_normal(line,continue_prompt)
         else:
             #print 'pre<%s> iFun <%s> rest <%s>' % (pre,iFun,theRest) # dbg
             if oinfo['isalias']:
                 return self.handle_alias(line,continue_prompt,
                                              pre,iFun,theRest)
 
             if (self.rc.autocall 
                  and
                    (
                    #only consider exclusion re if not "," or ";" autoquoting
                    (pre == self.ESC_QUOTE or pre == self.ESC_QUOTE2
                      or pre == self.ESC_PAREN) or 
                    (not self.re_exclude_auto.match(theRest)))
                  and 
                    self.re_fun_name.match(iFun) and 
                    callable(oinfo['obj'])) :
                 #print 'going auto'  # dbg
                 return self.handle_auto(line,continue_prompt,
                                         pre,iFun,theRest,oinfo['obj'])
             else:
                 #print 'was callable?', callable(oinfo['obj'])  # dbg
                 return self.handle_normal(line,continue_prompt)
 
         # If we get here, we have a normal Python line. Log and return.
         return self.handle_normal(line,continue_prompt)
 
     def _prefilter_dumb(self, line, continue_prompt):
         """simple prefilter function, for debugging"""
         return self.handle_normal(line,continue_prompt)
 
     # Set the default prefilter() function (this can be user-overridden)
     prefilter = _prefilter
 
     def handle_normal(self,line,continue_prompt=None,
                       pre=None,iFun=None,theRest=None):
         """Handle normal input lines. Use as a template for handlers."""
 
         # With autoindent on, we need some way to exit the input loop, and I
         # don't want to force the user to have to backspace all the way to
         # clear the line.  The rule will be in this case, that either two
         # lines of pure whitespace in a row, or a line of pure whitespace but
         # of a size different to the indent level, will exit the input loop.
         
         if (continue_prompt and self.autoindent and line.isspace() and
             (0 < abs(len(line) - self.indent_current_nsp) <= 2 or
              (self.buffer[-1]).isspace() )):
             line = ''
 
         self.log(line,continue_prompt)
         return line
 
     def handle_alias(self,line,continue_prompt=None,
                      pre=None,iFun=None,theRest=None):
         """Handle alias input lines. """
 
         # pre is needed, because it carries the leading whitespace.  Otherwise
         # aliases won't work in indented sections.
         transformed = self.transform_alias(iFun, theRest)        
         line_out = '%s_ip.system(%s)' % (pre, make_quoted_expr( transformed ))        
         self.log(line_out,continue_prompt)
         return line_out
 
     def handle_shell_escape(self, line, continue_prompt=None,
                             pre=None,iFun=None,theRest=None):
         """Execute the line in a shell, empty return value"""
 
         #print 'line in :', `line` # dbg
         # Example of a special handler. Others follow a similar pattern.
         if line.lstrip().startswith('!!'):
             # rewrite iFun/theRest to properly hold the call to %sx and
             # the actual command to be executed, so handle_magic can work
             # correctly
             theRest = '%s %s' % (iFun[2:],theRest)
             iFun = 'sx'
             return self.handle_magic('%ssx %s' % (self.ESC_MAGIC,
                                      line.lstrip()[2:]),
                                      continue_prompt,pre,iFun,theRest)
         else:
             cmd=line.lstrip().lstrip('!')
             line_out = '%s_ip.system(%s)' % (pre,make_quoted_expr(cmd))
         # update cache/log and return
         self.log(line_out,continue_prompt)
         return line_out
 
     def handle_magic(self, line, continue_prompt=None,
                      pre=None,iFun=None,theRest=None):
         """Execute magic functions."""
 
 
         cmd = '%s_ip.magic(%s)' % (pre,make_quoted_expr(iFun + " " + theRest))
         self.log(cmd,continue_prompt)
         #print 'in handle_magic, cmd=<%s>' % cmd  # dbg
         return cmd
 
     def handle_auto(self, line, continue_prompt=None,
                     pre=None,iFun=None,theRest=None,obj=None):
         """Hande lines which can be auto-executed, quoting if requested."""
 
         #print 'pre <%s> iFun <%s> rest <%s>' % (pre,iFun,theRest)  # dbg
         
         # This should only be active for single-line input!
         if continue_prompt:
             self.log(line,continue_prompt)
             return line
 
         auto_rewrite = True
         
         if pre == self.ESC_QUOTE:
             # Auto-quote splitting on whitespace
             newcmd = '%s("%s")' % (iFun,'", "'.join(theRest.split()) )
         elif pre == self.ESC_QUOTE2:
             # Auto-quote whole string
             newcmd = '%s("%s")' % (iFun,theRest)
         elif pre == self.ESC_PAREN:
             newcmd = '%s(%s)' % (iFun,",".join(theRest.split()))
         else:
             # Auto-paren.
             # We only apply it to argument-less calls if the autocall
             # parameter is set to 2.  We only need to check that autocall is <
             # 2, since this function isn't called unless it's at least 1.
             if not theRest and (self.rc.autocall < 2):
                 newcmd = '%s %s' % (iFun,theRest)
                 auto_rewrite = False
             else:
                 if theRest.startswith('['):
                     if hasattr(obj,'__getitem__'):
                         # Don't autocall in this case: item access for an object
                         # which is BOTH callable and implements __getitem__.
                         newcmd = '%s %s' % (iFun,theRest)
                         auto_rewrite = False
                     else:
                         # if the object doesn't support [] access, go ahead and
                         # autocall
                         newcmd = '%s(%s)' % (iFun.rstrip(),theRest)
                 elif theRest.endswith(';'):
                     newcmd = '%s(%s);' % (iFun.rstrip(),theRest[:-1])
                 else:
                     newcmd = '%s(%s)' % (iFun.rstrip(), theRest)
 
         if auto_rewrite:
             print >>Term.cout, self.outputcache.prompt1.auto_rewrite() + newcmd
         # log what is now valid Python, not the actual user input (without the
         # final newline)
         self.log(newcmd,continue_prompt)
         return newcmd
 
     def handle_help(self, line, continue_prompt=None,
                     pre=None,iFun=None,theRest=None):
         """Try to get some help for the object.
 
         obj? or ?obj   -> basic information.
         obj?? or ??obj -> more details.
         """
 
         # We need to make sure that we don't process lines which would be
         # otherwise valid python, such as "x=1 # what?"
         try:
             codeop.compile_command(line)
         except SyntaxError:
             # We should only handle as help stuff which is NOT valid syntax
             if line[0]==self.ESC_HELP:
                 line = line[1:]
             elif line[-1]==self.ESC_HELP:
                 line = line[:-1]
             self.log('#?'+line)
             if line:
                 self.magic_pinfo(line)
             else:
                 page(self.usage,screen_lines=self.rc.screen_length)
             return '' # Empty string is needed here!
         except:
             # Pass any other exceptions through to the normal handler
             return self.handle_normal(line,continue_prompt)
         else:
             # If the code compiles ok, we should handle it normally
             return self.handle_normal(line,continue_prompt)
 
     def getapi(self):
         """ Get an IPApi object for this shell instance
         
         Getting an IPApi object is always preferable to accessing the shell
         directly, but this holds true especially for extensions.
         
         It should always be possible to implement an extension with IPApi
         alone. If not, contact maintainer to request an addition.
         
         """
         return self.api
     
     def handle_emacs(self,line,continue_prompt=None,
                     pre=None,iFun=None,theRest=None):
         """Handle input lines marked by python-mode."""
 
         # Currently, nothing is done.  Later more functionality can be added
         # here if needed.
 
         # The input cache shouldn't be updated
 
         return line
 
     def mktempfile(self,data=None):
         """Make a new tempfile and return its filename.
 
         This makes a call to tempfile.mktemp, but it registers the created
         filename internally so ipython cleans it up at exit time.
 
         Optional inputs:
 
           - data(None): if data is given, it gets written out to the temp file
           immediately, and the file is closed again."""
 
         filename = tempfile.mktemp('.py','ipython_edit_')
         self.tempfiles.append(filename)
         
         if data:
             tmp_file = open(filename,'w')
             tmp_file.write(data)
             tmp_file.close()
         return filename
 
     def write(self,data):
         """Write a string to the default output"""
         Term.cout.write(data)
 
     def write_err(self,data):
         """Write a string to the default error output"""
         Term.cerr.write(data)
 
     def exit(self):
         """Handle interactive exit.
 
         This method sets the exit_now attribute."""
 
         if self.rc.confirm_exit:
             if ask_yes_no('Do you really want to exit ([y]/n)?','y'):
                 self.exit_now = True
         else:
             self.exit_now = True
         return self.exit_now
 
     def safe_execfile(self,fname,*where,**kw):
         fname = os.path.expanduser(fname)
 
         # find things also in current directory
         dname = os.path.dirname(fname)
         if not sys.path.count(dname):
             sys.path.append(dname)
 
         try:
             xfile = open(fname)
         except:
             print >> Term.cerr, \
                   'Could not open file <%s> for safe execution.' % fname
             return None
 
         kw.setdefault('islog',0)
         kw.setdefault('quiet',1)
         kw.setdefault('exit_ignore',0)
         first = xfile.readline()
         loghead = str(self.loghead_tpl).split('\n',1)[0].strip()
         xfile.close()
         # line by line execution
         if first.startswith(loghead) or kw['islog']:
             print 'Loading log file <%s> one line at a time...' % fname
             if kw['quiet']:
                 stdout_save = sys.stdout
                 sys.stdout = StringIO.StringIO()
             try:
                 globs,locs = where[0:2]
             except:
                 try:
                     globs = locs = where[0]
                 except:
                     globs = locs = globals()
             badblocks = []
 
             # we also need to identify indented blocks of code when replaying
             # logs and put them together before passing them to an exec
             # statement. This takes a bit of regexp and look-ahead work in the
             # file. It's easiest if we swallow the whole thing in memory
             # first, and manually walk through the lines list moving the
             # counter ourselves.
             indent_re = re.compile('\s+\S')
             xfile = open(fname)
             filelines = xfile.readlines()
             xfile.close()
             nlines = len(filelines)
             lnum = 0
             while lnum < nlines:
                 line = filelines[lnum]
                 lnum += 1
                 # don't re-insert logger status info into cache
                 if line.startswith('#log#'):
                     continue
                 else:
                     # build a block of code (maybe a single line) for execution
                     block = line
                     try:
                         next = filelines[lnum] # lnum has already incremented
                     except:
                         next = None
                     while next and indent_re.match(next):
                         block += next
                         lnum += 1
                         try:
                             next = filelines[lnum]
                         except:
                             next = None
                     # now execute the block of one or more lines
                     try:
                         exec block in globs,locs
                     except SystemExit:
                         pass
                     except:
                         badblocks.append(block.rstrip())
             if kw['quiet']:  # restore stdout
                 sys.stdout.close()
                 sys.stdout = stdout_save
             print 'Finished replaying log file <%s>' % fname
             if badblocks:
                 print >> sys.stderr, ('\nThe following lines/blocks in file '
                                       '<%s> reported errors:' % fname)
                     
                 for badline in badblocks:
                     print >> sys.stderr, badline
         else:  # regular file execution
             try:
                 execfile(fname,*where)
             except SyntaxError:
                 self.showsyntaxerror()
                 warn('Failure executing file: <%s>' % fname)
             except SystemExit,status:
                 if not kw['exit_ignore']:
                     self.showtraceback()
                     warn('Failure executing file: <%s>' % fname)
             except:
                 self.showtraceback()
                 warn('Failure executing file: <%s>' % fname)
 
 #************************* end of file <iplib.py> *****************************