Merge pull request #1839 from juliantaylor/external-cleanup

Remove pyparsing and mglob from IPython.externals

IPython/core/prefilter.py

@@ -1,957 +1,956 b''
 # encoding: utf-8
 """
 Prefiltering components.
 
 Prefilters transform user input before it is exec'd by Python.  These
 transforms are used to implement additional syntax such as !ls and %magic.
 
 Authors:
 
 * Brian Granger
 * Fernando Perez
 * Dan Milstein
 * Ville Vainio
 """
 
 #-----------------------------------------------------------------------------
 #  Copyright (C) 2008-2011  The IPython Development Team
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #-----------------------------------------------------------------------------
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 
 import __builtin__
 import codeop
 import re
 
 from IPython.core.alias import AliasManager
 from IPython.core.autocall import IPyAutocall
 from IPython.config.configurable import Configurable
 from IPython.core.macro import Macro
 from IPython.core.splitinput import split_user_input, LineInfo
 from IPython.core import page
 
 from IPython.utils.traitlets import (
     List, Integer, Any, Unicode, CBool, Bool, Instance, CRegExp
 )
 from IPython.utils.autoattr import auto_attr
 
 #-----------------------------------------------------------------------------
 # Global utilities, errors and constants
 #-----------------------------------------------------------------------------
 
 # Warning, these cannot be changed unless various regular expressions
 # are updated in a number of places.  Not great, but at least we told you.
 ESC_SHELL  = '!'
 ESC_SH_CAP = '!!'
 ESC_HELP   = '?'
 ESC_MAGIC  = '%'
 ESC_QUOTE  = ','
 ESC_QUOTE2 = ';'
 ESC_PAREN  = '/'
 
 
 class PrefilterError(Exception):
     pass
 
 
 # RegExp to identify potential function names
 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 checkPythonChars
 # 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.
 re_exclude_auto = re.compile(r'^[,&^\|\*/\+-]'
                              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_.\[\]]*) ?$')
 
 
 # Handler Check Utilities
 def is_shadowed(identifier, ip):
     """Is the given identifier defined in one of the namespaces which shadow
     the alias and magic namespaces?  Note that an identifier is different
     than ifun, because it can not contain a '.' character."""
     # This is much safer than calling ofind, which can change state
     return (identifier in ip.user_ns \
             or identifier in ip.user_global_ns \
             or identifier in ip.ns_table['builtin'])
 
 
 #-----------------------------------------------------------------------------
 # Main Prefilter manager
 #-----------------------------------------------------------------------------
 
 
 class PrefilterManager(Configurable):
     """Main prefilter component.
 
     The IPython prefilter is run on all user input before it is run.  The
     prefilter consumes lines of input and produces transformed lines of
     input.
 
     The iplementation consists of two phases:
 
     1. Transformers
     2. Checkers and handlers
 
     Over time, we plan on deprecating the checkers and handlers and doing
     everything in the transformers.
 
     The transformers are instances of :class:`PrefilterTransformer` and have
     a single method :meth:`transform` that takes a line and returns a
     transformed line.  The transformation can be accomplished using any
-    tool, but our current ones use regular expressions for speed.  We also
-    ship :mod:`pyparsing` in :mod:`IPython.external` for use in transformers.
+    tool, but our current ones use regular expressions for speed.
 
     After all the transformers have been run, the line is fed to the checkers,
     which are instances of :class:`PrefilterChecker`.  The line is passed to
     the :meth:`check` method, which either returns `None` or a
     :class:`PrefilterHandler` instance.  If `None` is returned, the other
     checkers are tried.  If an :class:`PrefilterHandler` instance is returned,
     the line is passed to the :meth:`handle` method of the returned
     handler and no further checkers are tried.
 
     Both transformers and checkers have a `priority` attribute, that determines
     the order in which they are called.  Smaller priorities are tried first.
 
     Both transformers and checkers also have `enabled` attribute, which is
     a boolean that determines if the instance is used.
 
     Users or developers can change the priority or enabled attribute of
     transformers or checkers, but they must call the :meth:`sort_checkers`
     or :meth:`sort_transformers` method after changing the priority.
     """
 
     multi_line_specials = CBool(True, config=True)
     shell = Instance('IPython.core.interactiveshell.InteractiveShellABC')
 
     def __init__(self, shell=None, config=None):
         super(PrefilterManager, self).__init__(shell=shell, config=config)
         self.shell = shell
         self.init_transformers()
         self.init_handlers()
         self.init_checkers()
 
     #-------------------------------------------------------------------------
     # API for managing transformers
     #-------------------------------------------------------------------------
 
     def init_transformers(self):
         """Create the default transformers."""
         self._transformers = []
         for transformer_cls in _default_transformers:
             transformer_cls(
                 shell=self.shell, prefilter_manager=self, config=self.config
             )
 
     def sort_transformers(self):
         """Sort the transformers by priority.
 
         This must be called after the priority of a transformer is changed.
         The :meth:`register_transformer` method calls this automatically.
         """
         self._transformers.sort(key=lambda x: x.priority)
 
     @property
     def transformers(self):
         """Return a list of checkers, sorted by priority."""
         return self._transformers
 
     def register_transformer(self, transformer):
         """Register a transformer instance."""
         if transformer not in self._transformers:
             self._transformers.append(transformer)
             self.sort_transformers()
 
     def unregister_transformer(self, transformer):
         """Unregister a transformer instance."""
         if transformer in self._transformers:
             self._transformers.remove(transformer)
 
     #-------------------------------------------------------------------------
     # API for managing checkers
     #-------------------------------------------------------------------------
 
     def init_checkers(self):
         """Create the default checkers."""
         self._checkers = []
         for checker in _default_checkers:
             checker(
                 shell=self.shell, prefilter_manager=self, config=self.config
             )
 
     def sort_checkers(self):
         """Sort the checkers by priority.
 
         This must be called after the priority of a checker is changed.
         The :meth:`register_checker` method calls this automatically.
         """
         self._checkers.sort(key=lambda x: x.priority)
 
     @property
     def checkers(self):
         """Return a list of checkers, sorted by priority."""
         return self._checkers
 
     def register_checker(self, checker):
         """Register a checker instance."""
         if checker not in self._checkers:
             self._checkers.append(checker)
             self.sort_checkers()
 
     def unregister_checker(self, checker):
         """Unregister a checker instance."""
         if checker in self._checkers:
             self._checkers.remove(checker)
 
     #-------------------------------------------------------------------------
     # API for managing checkers
     #-------------------------------------------------------------------------
 
     def init_handlers(self):
         """Create the default handlers."""
         self._handlers = {}
         self._esc_handlers = {}
         for handler in _default_handlers:
             handler(
                 shell=self.shell, prefilter_manager=self, config=self.config
             )
 
     @property
     def handlers(self):
         """Return a dict of all the handlers."""
         return self._handlers
 
     def register_handler(self, name, handler, esc_strings):
         """Register a handler instance by name with esc_strings."""
         self._handlers[name] = handler
         for esc_str in esc_strings:
             self._esc_handlers[esc_str] = handler
 
     def unregister_handler(self, name, handler, esc_strings):
         """Unregister a handler instance by name with esc_strings."""
         try:
             del self._handlers[name]
         except KeyError:
             pass
         for esc_str in esc_strings:
             h = self._esc_handlers.get(esc_str)
             if h is handler:
                 del self._esc_handlers[esc_str]
 
     def get_handler_by_name(self, name):
         """Get a handler by its name."""
         return self._handlers.get(name)
 
     def get_handler_by_esc(self, esc_str):
         """Get a handler by its escape string."""
         return self._esc_handlers.get(esc_str)
 
     #-------------------------------------------------------------------------
     # Main prefiltering API
     #-------------------------------------------------------------------------
 
     def prefilter_line_info(self, line_info):
         """Prefilter a line that has been converted to a LineInfo object.
 
         This implements the checker/handler part of the prefilter pipe.
         """
         # print "prefilter_line_info: ", line_info
         handler = self.find_handler(line_info)
         return handler.handle(line_info)
 
     def find_handler(self, line_info):
         """Find a handler for the line_info by trying checkers."""
         for checker in self.checkers:
             if checker.enabled:
                 handler = checker.check(line_info)
                 if handler:
                     return handler
         return self.get_handler_by_name('normal')
 
     def transform_line(self, line, continue_prompt):
         """Calls the enabled transformers in order of increasing priority."""
         for transformer in self.transformers:
             if transformer.enabled:
                 line = transformer.transform(line, continue_prompt)
         return line
 
     def prefilter_line(self, line, continue_prompt=False):
         """Prefilter a single input line as text.
 
         This method prefilters a single line of text by calling the
         transformers and then the checkers/handlers.
         """
 
         # print "prefilter_line: ", line, continue_prompt
         # All handlers *must* return a value, even if it's blank ('').
 
         # save the line away in case we crash, so the post-mortem handler can
         # record it
         self.shell._last_input_line = line
 
         if not line:
             # Return immediately on purely empty lines, so that if the user
             # previously typed some whitespace that started a continuation
             # prompt, he can break out of that loop with just an empty line.
             # This is how the default python prompt works.
             return ''
 
         # At this point, we invoke our transformers.
         if not continue_prompt or (continue_prompt and self.multi_line_specials):
             line = self.transform_line(line, continue_prompt)
 
         # Now we compute line_info for the checkers and handlers
         line_info = LineInfo(line, continue_prompt)
 
         # the input history needs to track even empty lines
         stripped = line.strip()
 
         normal_handler = self.get_handler_by_name('normal')
         if not stripped:
             if not continue_prompt:
                 self.shell.displayhook.prompt_count -= 1
 
             return normal_handler.handle(line_info)
 
         # special handlers are only allowed for single line statements
         if continue_prompt and not self.multi_line_specials:
             return normal_handler.handle(line_info)
 
         prefiltered = self.prefilter_line_info(line_info)
         # print "prefiltered line: %r" % prefiltered
         return prefiltered
 
     def prefilter_lines(self, lines, continue_prompt=False):
         """Prefilter multiple input lines of text.
 
         This is the main entry point for prefiltering multiple lines of
         input.  This simply calls :meth:`prefilter_line` for each line of
         input.
 
         This covers cases where there are multiple lines in the user entry,
         which is the case when the user goes back to a multiline history
         entry and presses enter.
         """
         llines = lines.rstrip('\n').split('\n')
         # We can get multiple lines in one shot, where multiline input 'blends'
         # into one line, in cases like recalling from the readline history
         # buffer.  We need to make sure that in such cases, we correctly
         # communicate downstream which line is first and which are continuation
         # ones.
         if len(llines) > 1:
             out = '\n'.join([self.prefilter_line(line, lnum>0)
                              for lnum, line in enumerate(llines) ])
         else:
             out = self.prefilter_line(llines[0], continue_prompt)
 
         return out
 
 #-----------------------------------------------------------------------------
 # Prefilter transformers
 #-----------------------------------------------------------------------------
 
 
 class PrefilterTransformer(Configurable):
     """Transform a line of user input."""
 
     priority = Integer(100, config=True)
     # Transformers don't currently use shell or prefilter_manager, but as we
     # move away from checkers and handlers, they will need them.
     shell = Instance('IPython.core.interactiveshell.InteractiveShellABC')
     prefilter_manager = Instance('IPython.core.prefilter.PrefilterManager')
     enabled = Bool(True, config=True)
 
     def __init__(self, shell=None, prefilter_manager=None, config=None):
         super(PrefilterTransformer, self).__init__(
             shell=shell, prefilter_manager=prefilter_manager, config=config
         )
         self.prefilter_manager.register_transformer(self)
 
     def transform(self, line, continue_prompt):
         """Transform a line, returning the new one."""
         return None
 
     def __repr__(self):
         return "<%s(priority=%r, enabled=%r)>" % (
             self.__class__.__name__, self.priority, self.enabled)
 
 
 _assign_system_re = re.compile(r'(?P<lhs>(\s*)([\w\.]+)((\s*,\s*[\w\.]+)*))'
                                r'\s*=\s*!(?P<cmd>.*)')
 
 
 class AssignSystemTransformer(PrefilterTransformer):
     """Handle the `files = !ls` syntax."""
 
     priority = Integer(100, config=True)
 
     def transform(self, line, continue_prompt):
         m = _assign_system_re.match(line)
         if m is not None:
             cmd = m.group('cmd')
             lhs = m.group('lhs')
             expr = "sc =%s" % cmd
             new_line = '%s = get_ipython().magic(%r)' % (lhs, expr)
             return new_line
         return line
 
 
 _assign_magic_re = re.compile(r'(?P<lhs>(\s*)([\w\.]+)((\s*,\s*[\w\.]+)*))'
                                r'\s*=\s*%(?P<cmd>.*)')
 
 class AssignMagicTransformer(PrefilterTransformer):
     """Handle the `a = %who` syntax."""
 
     priority = Integer(200, config=True)
 
     def transform(self, line, continue_prompt):
         m = _assign_magic_re.match(line)
         if m is not None:
             cmd = m.group('cmd')
             lhs = m.group('lhs')
             new_line = '%s = get_ipython().magic(%r)' % (lhs, cmd)
             return new_line
         return line
 
 
 _classic_prompt_re = re.compile(r'(^[ \t]*>>> |^[ \t]*\.\.\. )')
 
 class PyPromptTransformer(PrefilterTransformer):
     """Handle inputs that start with '>>> ' syntax."""
 
     priority = Integer(50, config=True)
 
     def transform(self, line, continue_prompt):
 
         if not line or line.isspace() or line.strip() == '...':
             # This allows us to recognize multiple input prompts separated by
             # blank lines and pasted in a single chunk, very common when
             # pasting doctests or long tutorial passages.
             return ''
         m = _classic_prompt_re.match(line)
         if m:
             return line[len(m.group(0)):]
         else:
             return line
 
 
 _ipy_prompt_re = re.compile(r'(^[ \t]*In \[\d+\]: |^[ \t]*\ \ \ \.\.\.+: )')
 
 class IPyPromptTransformer(PrefilterTransformer):
     """Handle inputs that start classic IPython prompt syntax."""
 
     priority = Integer(50, config=True)
 
     def transform(self, line, continue_prompt):
 
         if not line or line.isspace() or line.strip() == '...':
             # This allows us to recognize multiple input prompts separated by
             # blank lines and pasted in a single chunk, very common when
             # pasting doctests or long tutorial passages.
             return ''
         m = _ipy_prompt_re.match(line)
         if m:
             return line[len(m.group(0)):]
         else:
             return line
 
 #-----------------------------------------------------------------------------
 # Prefilter checkers
 #-----------------------------------------------------------------------------
 
 
 class PrefilterChecker(Configurable):
     """Inspect an input line and return a handler for that line."""
 
     priority = Integer(100, config=True)
     shell = Instance('IPython.core.interactiveshell.InteractiveShellABC')
     prefilter_manager = Instance('IPython.core.prefilter.PrefilterManager')
     enabled = Bool(True, config=True)
 
     def __init__(self, shell=None, prefilter_manager=None, config=None):
         super(PrefilterChecker, self).__init__(
             shell=shell, prefilter_manager=prefilter_manager, config=config
         )
         self.prefilter_manager.register_checker(self)
 
     def check(self, line_info):
         """Inspect line_info and return a handler instance or None."""
         return None
 
     def __repr__(self):
         return "<%s(priority=%r, enabled=%r)>" % (
             self.__class__.__name__, self.priority, self.enabled)
 
 
 class EmacsChecker(PrefilterChecker):
 
     priority = Integer(100, config=True)
     enabled = Bool(False, config=True)
 
     def check(self, line_info):
         "Emacs ipython-mode tags certain input lines."
         if line_info.line.endswith('# PYTHON-MODE'):
             return self.prefilter_manager.get_handler_by_name('emacs')
         else:
             return None
 
 
 class ShellEscapeChecker(PrefilterChecker):
 
     priority = Integer(200, config=True)
 
     def check(self, line_info):
         if line_info.line.lstrip().startswith(ESC_SHELL):
             return self.prefilter_manager.get_handler_by_name('shell')
 
 
 class MacroChecker(PrefilterChecker):
 
     priority = Integer(250, config=True)
 
     def check(self, line_info):
         obj = self.shell.user_ns.get(line_info.ifun)
         if isinstance(obj, Macro):
             return self.prefilter_manager.get_handler_by_name('macro')
         else:
             return None
 
 
 class IPyAutocallChecker(PrefilterChecker):
 
     priority = Integer(300, config=True)
 
     def check(self, line_info):
         "Instances of IPyAutocall in user_ns get autocalled immediately"
         obj = self.shell.user_ns.get(line_info.ifun, None)
         if isinstance(obj, IPyAutocall):
             obj.set_ip(self.shell)
             return self.prefilter_manager.get_handler_by_name('auto')
         else:
             return None
 
 
 class MultiLineMagicChecker(PrefilterChecker):
 
     priority = Integer(400, config=True)
 
     def check(self, line_info):
         "Allow ! and !! in multi-line statements if multi_line_specials is on"
         # Note that this one of the only places we check the first character of
         # ifun and *not* the pre_char.  Also note that the below test matches
         # both ! and !!.
         if line_info.continue_prompt \
             and self.prefilter_manager.multi_line_specials:
                 if line_info.esc == ESC_MAGIC:
                     return self.prefilter_manager.get_handler_by_name('magic')
         else:
             return None
 
 
 class EscCharsChecker(PrefilterChecker):
 
     priority = Integer(500, config=True)
 
     def check(self, line_info):
         """Check for escape character and return either a handler to handle it,
         or None if there is no escape char."""
         if line_info.line[-1] == ESC_HELP \
                and line_info.esc != ESC_SHELL \
                and line_info.esc != ESC_SH_CAP:
             # the ? can be at the end, but *not* for either kind of shell escape,
             # because a ? can be a vaild final char in a shell cmd
             return self.prefilter_manager.get_handler_by_name('help')
         else:
             if line_info.pre:
                 return None
             # This returns None like it should if no handler exists
             return self.prefilter_manager.get_handler_by_esc(line_info.esc)
 
 
 class AssignmentChecker(PrefilterChecker):
 
     priority = Integer(600, config=True)
 
     def check(self, line_info):
         """Check to see if user is assigning to a var for the first time, in
         which case we want to avoid any sort of automagic / autocall games.
 
         This 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).  E.g. ls='hi', or ls,that=1,2"""
         if line_info.the_rest:
             if line_info.the_rest[0] in '=,':
                 return self.prefilter_manager.get_handler_by_name('normal')
         else:
             return None
 
 
 class AutoMagicChecker(PrefilterChecker):
 
     priority = Integer(700, config=True)
 
     def check(self, line_info):
         """If the ifun is magic, and automagic is on, run it.  Note: normal,
         non-auto magic would already have been triggered via '%' in
         check_esc_chars. This just checks for automagic.  Also, before
         triggering the magic handler, make sure that there is nothing in the
         user namespace which could shadow it."""
         if not self.shell.automagic or not self.shell.find_magic(line_info.ifun):
             return None
 
         # We have a likely magic method.  Make sure we should actually call it.
         if line_info.continue_prompt and not self.prefilter_manager.multi_line_specials:
             return None
 
         head = line_info.ifun.split('.',1)[0]
         if is_shadowed(head, self.shell):
             return None
 
         return self.prefilter_manager.get_handler_by_name('magic')
 
 
 class AliasChecker(PrefilterChecker):
 
     priority = Integer(800, config=True)
 
     def check(self, line_info):
         "Check if the initital identifier on the line is an alias."
         # Note: aliases can not contain '.'
         head = line_info.ifun.split('.',1)[0]
         if line_info.ifun not in self.shell.alias_manager \
                or head not in self.shell.alias_manager \
                or is_shadowed(head, self.shell):
             return None
 
         return self.prefilter_manager.get_handler_by_name('alias')
 
 
 class PythonOpsChecker(PrefilterChecker):
 
     priority = Integer(900, config=True)
 
     def check(self, line_info):
         """If the 'rest' of the line begins with a function call or pretty much
         any python operator, we should simply execute the line (regardless of
         whether or not there's a possible autocall expansion).  This avoids
         spurious (and very confusing) geattr() accesses."""
         if line_info.the_rest and line_info.the_rest[0] in '!=()<>,+*/%^&|':
             return self.prefilter_manager.get_handler_by_name('normal')
         else:
             return None
 
 
 class AutocallChecker(PrefilterChecker):
 
     priority = Integer(1000, config=True)
 
     function_name_regexp = CRegExp(re_fun_name, config=True,
         help="RegExp to identify potential function names.")
     exclude_regexp = CRegExp(re_exclude_auto, config=True,
         help="RegExp to exclude strings with this start from autocalling.")
 
     def check(self, line_info):
         "Check if the initial word/function is callable and autocall is on."
         if not self.shell.autocall:
             return None
 
         oinfo = line_info.ofind(self.shell) # This can mutate state via getattr
         if not oinfo['found']:
             return None
 
         if callable(oinfo['obj']) \
                and (not self.exclude_regexp.match(line_info.the_rest)) \
                and self.function_name_regexp.match(line_info.ifun):
             return self.prefilter_manager.get_handler_by_name('auto')
         else:
             return None
 
 
 #-----------------------------------------------------------------------------
 # Prefilter handlers
 #-----------------------------------------------------------------------------
 
 
 class PrefilterHandler(Configurable):
 
     handler_name = Unicode('normal')
     esc_strings = List([])
     shell = Instance('IPython.core.interactiveshell.InteractiveShellABC')
     prefilter_manager = Instance('IPython.core.prefilter.PrefilterManager')
 
     def __init__(self, shell=None, prefilter_manager=None, config=None):
         super(PrefilterHandler, self).__init__(
             shell=shell, prefilter_manager=prefilter_manager, config=config
         )
         self.prefilter_manager.register_handler(
             self.handler_name,
             self,
             self.esc_strings
         )
 
     def handle(self, line_info):
         # print "normal: ", line_info
         """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.
         line = line_info.line
         continue_prompt = line_info.continue_prompt
 
         if (continue_prompt and
             self.shell.autoindent and
             line.isspace() and
             0 < abs(len(line) - self.shell.indent_current_nsp) <= 2):
             line = ''
 
         return line
 
     def __str__(self):
         return "<%s(name=%s)>" % (self.__class__.__name__, self.handler_name)
 
 
 class AliasHandler(PrefilterHandler):
 
     handler_name = Unicode('alias')
 
     def handle(self, line_info):
         """Handle alias input lines. """
         transformed = self.shell.alias_manager.expand_aliases(line_info.ifun,line_info.the_rest)
         # pre is needed, because it carries the leading whitespace.  Otherwise
         # aliases won't work in indented sections.
         line_out = '%sget_ipython().system(%r)' % (line_info.pre_whitespace, transformed)
 
         return line_out
 
 
 class ShellEscapeHandler(PrefilterHandler):
 
     handler_name = Unicode('shell')
     esc_strings = List([ESC_SHELL, ESC_SH_CAP])
 
     def handle(self, line_info):
         """Execute the line in a shell, empty return value"""
         magic_handler = self.prefilter_manager.get_handler_by_name('magic')
 
         line = line_info.line
         if line.lstrip().startswith(ESC_SH_CAP):
             # rewrite LineInfo's line, ifun and the_rest to properly hold the
             # call to %sx and the actual command to be executed, so
             # handle_magic can work correctly.  Note that this works even if
             # the line is indented, so it handles multi_line_specials
             # properly.
             new_rest = line.lstrip()[2:]
             line_info.line = '%ssx %s' % (ESC_MAGIC, new_rest)
             line_info.ifun = 'sx'
             line_info.the_rest = new_rest
             return magic_handler.handle(line_info)
         else:
             cmd = line.lstrip().lstrip(ESC_SHELL)
             line_out = '%sget_ipython().system(%r)' % (line_info.pre_whitespace, cmd)
         return line_out
 
 
 class MacroHandler(PrefilterHandler):
     handler_name = Unicode("macro")
 
     def handle(self, line_info):
         obj = self.shell.user_ns.get(line_info.ifun)
         pre_space = line_info.pre_whitespace
         line_sep = "\n" + pre_space
         return pre_space + line_sep.join(obj.value.splitlines())
 
 
 class MagicHandler(PrefilterHandler):
 
     handler_name = Unicode('magic')
     esc_strings = List([ESC_MAGIC])
 
     def handle(self, line_info):
         """Execute magic functions."""
         ifun    = line_info.ifun
         the_rest = line_info.the_rest
         cmd = '%sget_ipython().magic(%r)' % (line_info.pre_whitespace,
                                                     (ifun + " " + the_rest))
         return cmd
 
 
 class AutoHandler(PrefilterHandler):
 
     handler_name = Unicode('auto')
     esc_strings = List([ESC_PAREN, ESC_QUOTE, ESC_QUOTE2])
 
     def handle(self, line_info):
         """Handle lines which can be auto-executed, quoting if requested."""
         line    = line_info.line
         ifun    = line_info.ifun
         the_rest = line_info.the_rest
         pre     = line_info.pre
         esc     = line_info.esc
         continue_prompt = line_info.continue_prompt
         obj = line_info.ofind(self.shell)['obj']
         #print 'pre <%s> ifun <%s> rest <%s>' % (pre,ifun,the_rest)  # dbg
 
         # This should only be active for single-line input!
         if continue_prompt:
             return line
 
         force_auto = isinstance(obj, IPyAutocall)
 
         # User objects sometimes raise exceptions on attribute access other
         # than AttributeError (we've seen it in the past), so it's safest to be
         # ultra-conservative here and catch all.
         try:
             auto_rewrite = obj.rewrite
         except Exception:
             auto_rewrite = True
 
         if esc == ESC_QUOTE:
             # Auto-quote splitting on whitespace
             newcmd = '%s("%s")' % (ifun,'", "'.join(the_rest.split()) )
         elif esc == ESC_QUOTE2:
             # Auto-quote whole string
             newcmd = '%s("%s")' % (ifun,the_rest)
         elif esc == ESC_PAREN:
             newcmd = '%s(%s)' % (ifun,",".join(the_rest.split()))
         else:
             # Auto-paren.       
             if force_auto:
                 # Don't rewrite if it is already a call.
                 do_rewrite = not the_rest.startswith('(')
             else:
                 if not the_rest:
                     # We only apply it to argument-less calls if the autocall
                     # parameter is set to 2.
                     do_rewrite = (self.shell.autocall >= 2)
                 elif the_rest.startswith('[') and hasattr(obj, '__getitem__'):
                     # Don't autocall in this case: item access for an object
                     # which is BOTH callable and implements __getitem__.
                     do_rewrite = False
                 else:
                     do_rewrite = True
 
             # Figure out the rewritten command
             if do_rewrite:
                 if the_rest.endswith(';'):
                     newcmd = '%s(%s);' % (ifun.rstrip(),the_rest[:-1])
                 else:
                     newcmd = '%s(%s)' % (ifun.rstrip(), the_rest)                
             else:
                 normal_handler = self.prefilter_manager.get_handler_by_name('normal')
                 return normal_handler.handle(line_info)
         
         # Display the rewritten call
         if auto_rewrite:
             self.shell.auto_rewrite_input(newcmd)
 
         return newcmd
 
 
 class HelpHandler(PrefilterHandler):
 
     handler_name = Unicode('help')
     esc_strings = List([ESC_HELP])
 
     def handle(self, line_info):
         """Try to get some help for the object.
 
         obj? or ?obj   -> basic information.
         obj?? or ??obj -> more details.
         """
         normal_handler = self.prefilter_manager.get_handler_by_name('normal')
         line = line_info.line
         # 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]==ESC_HELP:
                 line = line[1:]
             elif line[-1]==ESC_HELP:
                 line = line[:-1]
             if line:
                 #print 'line:<%r>' % line  # dbg
                 self.shell.magic('pinfo %s' % line_info.ifun)
             else:
                 self.shell.show_usage()
             return '' # Empty string is needed here!
         except:
             raise
             # Pass any other exceptions through to the normal handler
             return normal_handler.handle(line_info)
         else:
             # If the code compiles ok, we should handle it normally
             return normal_handler.handle(line_info)
 
 
 class EmacsHandler(PrefilterHandler):
 
     handler_name = Unicode('emacs')
     esc_strings = List([])
 
     def handle(self, line_info):
         """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_info.line
 
 
 #-----------------------------------------------------------------------------
 # Defaults
 #-----------------------------------------------------------------------------
 
 
 _default_transformers = [
     AssignSystemTransformer,
     AssignMagicTransformer,
     PyPromptTransformer,
     IPyPromptTransformer,
 ]
 
 _default_checkers = [
     EmacsChecker,
     ShellEscapeChecker,
     MacroChecker,
     IPyAutocallChecker,
     MultiLineMagicChecker,
     EscCharsChecker,
     AssignmentChecker,
     AutoMagicChecker,
     AliasChecker,
     PythonOpsChecker,
     AutocallChecker
 ]
 
 _default_handlers = [
     PrefilterHandler,
     AliasHandler,
     ShellEscapeHandler,
     MacroHandler,
     MagicHandler,
     AutoHandler,
     HelpHandler,
     EmacsHandler
 ]

IPython/deathrow/ipy_profile_sh.py

@@ -1,271 +1,268 b''
 """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.core import ipapi
 from IPython.core.error import TryNext
 import os,re,textwrap
 
 # The import below effectively obsoletes your old-style ipythonrc[.ini],
 # so consider yourself warned!
 
 import ipy_defaults
 
 def main():
     ip = ipapi.get()
     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 IPython.external.path import path" )
     except ImportError:
         pass
 
     # beefed up %env is handy in shell mode
     import envpersist
 
     # To see where mycmd resides (in path/aliases), do %which mycmd
     import ipy_which
 
     # tab completers for hg, svn, ...
     import ipy_app_completers
 
     # To make executables foo and bar in mybin usable without PATH change, do:
     # %rehashdir c:/mybin
     # %store foo
     # %store bar
     import ipy_rehashdir
 
     # does not work without subprocess module!
     #import ipy_signals
 
     ip.ex('import os')
     ip.ex("def up(): os.chdir('..')")
     ip.user_ns['LA'] = LastArgFinder()
 
     # You can assign to _prompt_title variable
     # to provide some extra information for prompt
     # (e.g. the current mode, host/username...)
 
     ip.user_ns['_prompt_title'] = ''
 
     # Nice prompt
     o.prompt_in1= r'\C_Green${_prompt_title}\C_LightBlue[\C_LightCyan\Y2\C_LightBlue]\C_Green|\#> '
     o.prompt_in2= r'\C_Green|\C_LightGreen\D\C_Green> '
     o.prompt_out= '<\#> '
 
     from IPython.core import release
 
     import sys
     # Non-chatty banner
     o.banner = "IPython %s   [on Py %s]\n" % (release.version,sys.version.split(None,1)[0])
 
 
     ip.default_option('cd','-q')
     ip.default_option('macro', '-r')
     # If you only rarely want to execute the things you %edit...
     #ip.default_option('edit','-x')
 
 
     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.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")
 
     # lowcase aliases on win32 only
     if os.name == 'posix':
         mapper = lambda s:s
     else:
         def mapper(s): return s.lower()
 
     for cmd in syscmds:
         # print "sys",cmd #dbg
         noext, ext = os.path.splitext(cmd)
         if ext.lower() == '.exe':
             cmd = noext
 
         key = mapper(cmd)
         if key not in ip.alias_manager.alias_table:
             # Dots will be removed from alias names, since ipython
             # assumes names with dots to be python code
 
             ip.define_alias(key.replace('.',''), cmd)
 
-    # mglob combines 'find', recursion, exclusion... '%mglob?' to learn more
-    ip.load("IPython.external.mglob")
-
     # win32 is crippled w/o cygwin, try to help it a little bit
     if sys.platform == 'win32':
         if 'cygwin' in os.environ['PATH'].lower():
             # use the colors of cygwin ls (recommended)
             ip.define_alias('d', 'ls -F --color=auto')
         else:
             # get icp, imv, imkdir, igrep, irm,...
             ip.load('ipy_fsops')
 
             # and the next best thing to real 'ls -F'
             ip.define_alias('d','dir /w /og /on')
 
     ip.set_hook('input_prefilter', slash_prefilter_f)
     extend_shell_behavior(ip)
 
 class LastArgFinder:
     """ Allow $LA to work as "last argument of previous command", like $! in bash
 
     To call this in normal IPython code, do LA()
     """
     def __call__(self, hist_idx = None):
         ip = ipapi.get()
         if hist_idx is None:
             return str(self)
         return ip.input_hist_raw[hist_idx].strip().split()[-1]
     def __str__(self):
         ip = ipapi.get()
         for cmd in reversed(ip.input_hist_raw):
             parts = cmd.strip().split()
             if len(parts) < 2 or parts[-1] in ['$LA', 'LA()']:
                 continue
             return parts[-1]
         return ""
 
 def slash_prefilter_f(self,line):
     """ ./foo, ~/foo and /bin/foo now run foo as system command
 
     Removes the need for doing !./foo, !~/foo or !/bin/foo
     """
     from IPython.utils import genutils
     if re.match('(?:[.~]|/[a-zA-Z_0-9]+)/', line):
         return "get_ipython().system(" + genutils.make_quoted_expr(line)+")"
     raise TryNext
 
 # XXX You do not need to understand the next function!
 # This should probably be moved out of profile
 
 def extend_shell_behavior(ip):
 
     # Instead of making signature a global variable tie it to IPSHELL.
     # In future if it is required to distinguish between different
     # shells we can assign a signature per shell basis
     ip.__sig__ = 0xa005
     # mark the IPSHELL with this signature
     ip.user_ns['__builtins__'].__dict__['__sig__'] = ip.__sig__
 
     from IPython.external.Itpl import ItplNS
     from IPython.utils.genutils import shell
     # utility to expand user variables via Itpl
     # xxx do something sensible with depth?
     ip.var_expand = lambda cmd, lvars=None, depth=2: \
         str(ItplNS(cmd, ip.user_ns, get_locals()))
 
     def get_locals():
         """ Substituting a variable through Itpl deep inside the IPSHELL stack
             requires the knowledge of all the variables in scope upto the last
             IPSHELL frame. This routine simply merges all the local variables
             on the IPSHELL stack without worrying about their scope rules
         """
         import sys
         # note lambda expression constitues a function call
         # hence fno should be incremented by one
         getsig = lambda fno: sys._getframe(fno+1).f_globals \
                              ['__builtins__'].__dict__['__sig__']
         getlvars = lambda fno: sys._getframe(fno+1).f_locals
         # trackback until we enter the IPSHELL
         frame_no = 1
         sig = ip.__sig__
         fsig = ~sig
         while fsig != sig :
             try:
                 fsig = getsig(frame_no)
             except (AttributeError, KeyError):
                 frame_no += 1
             except ValueError:
                 # stack is depleted
                 # call did not originate from IPSHELL
                 return {}
         first_frame = frame_no
         # walk further back until we exit from IPSHELL or deplete stack
         try:
             while(sig == getsig(frame_no+1)):
                 frame_no += 1
         except (AttributeError, KeyError, ValueError):
             pass
         # merge the locals from top down hence overriding
         # any re-definitions of variables, functions etc.
         lvars = {}
         for fno in range(frame_no, first_frame-1, -1):
             lvars.update(getlvars(fno))
         #print '\n'*5, first_frame, frame_no, '\n', lvars, '\n'*5 #dbg
         return lvars
 
     def _runlines(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).
         ip.resetbuffer()
         lines = lines.split('\n')
         more = 0
         command = ''
         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 command is not empty trim the line
             if command != '' :
                 line = line.strip()
             # add the broken line to the command
             if line and line[-1] == '\\' :
                 command += line[0:-1] + ' '
                 more = True
                 continue
             else :
                 # add the last (current) line to the command
                 command += line
                 if command or more:
                     # push to raw history, so hist line numbers stay in sync
                     ip.input_hist_raw.append("# " + command + "\n")
 
                     more = ip.push_line(ip.prefilter(command,more))
                     command = ''
                     # 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:
             ip.push_line('\n')
 
     ip.runlines = _runlines
 
 main()

IPython/quarantine/ipy_fsops.py

@@ -1,246 +1,254 b''
 """ File system operations
 
 Contains: Simple variants of normal unix shell commands (icp, imv, irm,
 imkdir, igrep).
 
 Some "otherwise handy" utils ('collect' for gathering files to
 ~/_ipython/collect, 'inote' for collecting single note lines to
 ~/_ipython/note.txt)
 
 Mostly of use for bare windows installations where cygwin/equivalent is not
 installed and you would otherwise need to deal with dos versions of the
 commands (that e.g. don't understand / as path separator). These can
 do some useful tricks on their own, though (like use 'mglob' patterns).
 
 Not to be confused with ipipe commands (ils etc.) that also start with i.
+
+QUARANTINE, NEEDS UPDATING TO THE NEW IPYTHON API TO WORK
+
+this depends on mglob that used to be in externals,
+if this code is updated to run again with current IPython, you may need to
+reintroduce that file back. In doing so, look for the possibility of achieving
+the same effect only with the standard library (which may have improved by now,
+since we currently depend on Python 2.6).
 """
 
 from IPython.core import ipapi
 from IPython.core.error import TryNext
 ip = ipapi.get()
 
 import shutil,os,shlex
 from IPython.external import mglob
 from IPython.external.path import path
 from IPython.core.error import UsageError
 import IPython.utils.generics
 
 def parse_args(args):
     """ Given arg string 'CMD files... target', return ([files], target) """
 
     tup = args.split(None, 1)
     if len(tup) == 1:
         raise UsageError("Expected arguments for " + tup[0])
 
     tup2 = shlex.split(tup[1])
 
     flist, trg = mglob.expand(tup2[0:-1]), tup2[-1]
     if not flist:
         raise UsageError("No files found:" + str(tup2[0:-1]))
     return flist, trg
 
 def icp(ip,arg):
     """ icp files... targetdir
 
     Copy all files to target, creating dirs for target if necessary
 
     icp srcdir dstdir
 
     Copy srcdir to distdir
 
     """
     import distutils.dir_util
 
     fs, targetdir = parse_args(arg)
     if not os.path.isdir(targetdir) and len(fs) > 1:
         distutils.dir_util.mkpath(targetdir,verbose =1)
     for f in fs:
         if os.path.isdir(f):
             shutil.copytree(f, targetdir)
         else:
             shutil.copy2(f,targetdir)
     return fs
 ip.define_alias("icp",icp)
 
 def imv(ip,arg):
     """ imv src tgt
 
     Move source to target.
     """
 
     fs, target = parse_args(arg)
     if len(fs) > 1:
         assert os.path.isdir(target)
     for f in fs:
         shutil.move(f, target)
     return fs
 ip.define_alias("imv",imv)
 
 def irm(ip,arg):
     """ irm path[s]...
 
     Remove file[s] or dir[s] path. Dirs are deleted recursively.
     """
     try:
         paths = mglob.expand(arg.split(None,1)[1])
     except IndexError:
         raise UsageError("%irm paths...")
     import distutils.dir_util
     for p in paths:
         print "rm",p
         if os.path.isdir(p):
             distutils.dir_util.remove_tree(p, verbose = 1)
         else:
             os.remove(p)
 
 ip.define_alias("irm",irm)
 
 def imkdir(ip,arg):
     """ imkdir path
 
     Creates dir path, and all dirs on the road
     """
     import distutils.dir_util
     targetdir = arg.split(None,1)[1]
     distutils.dir_util.mkpath(targetdir,verbose =1)
 
 ip.define_alias("imkdir",imkdir)
 
 def igrep(ip,arg):
     """ igrep PAT files...
 
     Very dumb file scan, case-insensitive.
 
     e.g.
 
     igrep "test this" rec:*.py
 
     """
     elems = shlex.split(arg)
     dummy, pat, fs = elems[0], elems[1], mglob.expand(elems[2:])
     res = []
     for f in fs:
         found = False
         for l in open(f):
             if pat.lower() in l.lower():
                 if not found:
                     print "[[",f,"]]"
                     found = True
                     res.append(f)
                 print l.rstrip()
     return res
 
 ip.define_alias("igrep",igrep)
 
 def collect(ip,arg):
     """ collect foo/a.txt rec:bar=*.py
 
     Copies foo/a.txt to ~/_ipython/collect/foo/a.txt and *.py from bar,
     likewise
 
     Without args, try to open ~/_ipython/collect dir (in win32 at least).
     """
     from IPython.external.path import path
     basedir = path(ip.ipython_dir + '/collect')
     try:
         fs = mglob.expand(arg.split(None,1)[1])
     except IndexError:
         os.startfile(basedir)
         return
     for f in fs:
         f = path(f)
         trg = basedir / f.splitdrive()[1].lstrip('/\\')
         if f.isdir():
             print "mkdir",trg
             trg.makedirs()
             continue
         dname = trg.dirname()
         if not dname.isdir():
             dname.makedirs()
         print f,"=>",trg
         shutil.copy2(f,trg)
 
 ip.define_alias("collect",collect)
 
 def inote(ip,arg):
     """ inote Hello world
 
     Adds timestamp and Hello world to ~/_ipython/notes.txt
 
     Without args, opens notes.txt for editing.
     """
     import time
     fname = ip.ipython_dir + '/notes.txt'
 
     try:
         entry = " === " + time.asctime() + ': ===\n' + arg.split(None,1)[1] + '\n'
         f= open(fname, 'a').write(entry)
     except IndexError:
         ip.hooks.editor(fname)
 
 ip.define_alias("inote",inote)
 
 def pathobj_mangle(p):
     return p.replace(' ', '__').replace('.','DOT')
 def pathobj_unmangle(s):
     return s.replace('__',' ').replace('DOT','.')
 
 
 
 class PathObj(path):
     def __init__(self,p):
         self.path = p
         if p != '.':
             self.ents = [pathobj_mangle(ent) for ent in os.listdir(p)]
         else:
             self.ents = None
     def __complete__(self):
         if self.path != '.':
             return self.ents
         self.ents = [pathobj_mangle(ent) for ent in os.listdir('.')]
         return self.ents
     def __getattr__(self,name):
         if name in self.ents:
             if self.path.endswith('/'):
                 sep = ''
             else:
                 sep = '/'
 
             tgt = self.path + sep + pathobj_unmangle(name)
             #print "tgt",tgt
             if os.path.isdir(tgt):
                 return PathObj(tgt)
             if os.path.isfile(tgt):
                 return path(tgt)
 
         raise AttributeError, name  # <<< DON'T FORGET THIS LINE !!
     def __str__(self):
         return self.path
 
     def __repr__(self):
         return "<PathObj to %s>" % self.path
 
     def __call__(self):
         print "cd:",self.path
         os.chdir(self.path)
 
 def complete_pathobj(obj, prev_completions):
     if hasattr(obj,'__complete__'):
         res = obj.__complete__()
         if res:
             return res
     # just return normal attributes of 'path' object if the dir is empty
     raise TryNext
 
 complete_pathobj = IPython.utils.generics.complete_object.when_type(PathObj)(complete_pathobj)
 
 def test_pathobj():
     #p = PathObj('c:/prj')
     #p2 = p.cgi
     #print p,p2
     rootdir = PathObj("/")
     startmenu = PathObj("d:/Documents and Settings/All Users/Start Menu/Programs")
     cwd = PathObj('.')
     ip.push("rootdir startmenu cwd")
 
-#test_pathobj()
  No newline at end of file
+#test_pathobj()

docs/source/interactive/shell.txt

@@ -1,294 +1,283 b''
 .. _ipython_as_shell:
 
 =========================
 IPython as a system shell
 =========================
 
 .. warning::
 
     As of the 0.11 version of IPython, most of the APIs used by the shell
     profile have been changed, so the profile currently does very little
     beyond changing the IPython prompt.  To help restore the shell
     profile to past functionality described here, the old code is found in 
     :file:`IPython/deathrow`, which needs to be updated to use the
     APIs in 0.11.
 
 Overview
 ========
 
 The 'sh' profile optimizes IPython for system shell usage. Apart from
 certain job control functionality that is present in unix (ctrl+z does
 "suspend"), the sh profile should provide you with most of the
 functionality you use daily in system shell, and more. Invoke IPython
 in 'sh' profile by doing 'ipython -p sh', or (in win32) by launching
 the "pysh" shortcut in start menu.
 
 If you want to use the features of sh profile as your defaults (which
 might be a good idea if you use other profiles a lot of the time but
 still want the convenience of sh profile), add ``import ipy_profile_sh``
 to your $IPYTHONDIR/ipy_user_conf.py.
 
 The 'sh' profile is different from the default profile in that:
 
  * Prompt shows the current directory
  * Spacing between prompts and input is more compact (no padding with
    empty lines). The startup banner is more compact as well.
  * System commands are directly available (in alias table) without
    requesting %rehashx - however, if you install new programs along
    your PATH, you might want to run %rehashx to update the persistent
    alias table
  * Macros are stored in raw format by default. That is, instead of
    '_ip.system("cat foo"), the macro will contain text 'cat foo')
  * Autocall is in full mode
  * Calling "up" does "cd .."
 
 The 'sh' profile is different from the now-obsolete (and unavailable)
 'pysh' profile in that the ``$$var = command`` and ``$var = command`` syntax is
 not supported anymore. Use ``var = !command`` instead (which is available in all
 IPython profiles).
 
 Aliases
 =======
 
 All of your $PATH has been loaded as IPython aliases, so you should be
 able to type any normal system command and have it executed. See
 %alias?  and %unalias? for details on the alias facilities. See also
 %rehashx? for details on the mechanism used to load $PATH.
 
 
 Directory management
 ====================
 
 Since each command passed by ipython to the underlying system is executed
 in a subshell which exits immediately, you can NOT use !cd to navigate
 the filesystem.
 
 IPython provides its own builtin '%cd' magic command to move in the
 filesystem (the % is not required with automagic on). It also maintains
 a list of visited directories (use %dhist to see it) and allows direct
 switching to any of them. Type 'cd?' for more details.
 
 %pushd, %popd and %dirs are provided for directory stack handling.
 
 
 Enabled extensions
 ==================
 
 Some extensions, listed below, are enabled as default in this profile.
 
 envpersist
 ----------
 
 %env can be used to "remember" environment variable manipulations. Examples::
 
 	%env - Show all environment variables
 	%env VISUAL=jed  - set VISUAL to jed
 	%env PATH+=;/foo - append ;foo to PATH
 	%env PATH+=;/bar - also append ;bar to PATH
 	%env PATH-=/wbin; - prepend /wbin; to PATH
 	%env -d VISUAL   - forget VISUAL persistent val
 	%env -p          - print all persistent env modifications
 
 ipy_which
 ---------
 
 %which magic command. Like 'which' in unix, but knows about ipython aliases.
 
 Example::
 
  [C:/ipython]|14> %which st
  st -> start .
  [C:/ipython]|15> %which d
  d -> dir /w /og /on
  [C:/ipython]|16> %which cp
  cp -> cp
    == c:\bin\cp.exe
  c:\bin\cp.exe
 
 ipy_app_completers
 ------------------
 
 Custom tab completers for some apps like svn, hg, bzr, apt-get. Try 'apt-get install <TAB>' in debian/ubuntu.
 
 ipy_rehashdir
 -------------
 
 Allows you to add system command aliases for commands that are not along your path. Let's say that you just installed Putty and want to be able to invoke it without adding it to path, you can create the alias for it with rehashdir::
 
  [~]|22> cd c:/opt/PuTTY/
  [c:opt/PuTTY]|23> rehashdir .
               <23> ['pageant', 'plink', 'pscp', 'psftp', 'putty', 'puttygen', 'unins000']
 
 Now, you can execute any of those commams directly::
 
  [c:opt/PuTTY]|24> cd
  [~]|25> putty
 
 (the putty window opens).
 
 If you want to store the alias so that it will always be available, do '%store putty'. If you want to %store all these aliases persistently, just do it in a for loop::
 
  [~]|27> for a in _23:
     |..>     %store $a
     |..>
     |..>
  Alias stored: pageant (0, 'c:\\opt\\PuTTY\\pageant.exe')
  Alias stored: plink (0, 'c:\\opt\\PuTTY\\plink.exe')
  Alias stored: pscp (0, 'c:\\opt\\PuTTY\\pscp.exe')
  Alias stored: psftp (0, 'c:\\opt\\PuTTY\\psftp.exe')
  ...
 
-mglob
------
-
-Provide the magic function %mglob, which makes it easier (than the 'find' command) to collect (possibly recursive) file lists. Examples::
-
- [c:/ipython]|9> mglob *.py
- [c:/ipython]|10> mglob *.py rec:*.txt
- [c:/ipython]|19> workfiles = %mglob !.svn/ !.hg/ !*_Data/ !*.bak rec:.
-
-Note that the first 2 calls will put the file list in result history (_, _9, _10), and the last one will assign it to 'workfiles'.
-
 
 Prompt customization
 ====================
 
 The sh profile uses the following prompt configurations::
 
     c.PromptManager.in_template = r'{color.LightGreen}\u@\h{color.LightBlue}[{color.LightCyan}\Y1{color.LightBlue}]{color.Green}|\#> '
     c.PromptManager.in2_template = r'{color.Green}|{color.LightGreen}\D{color.Green}> '
     c.PromptManager.out_template = r'<\#> '
 
 You can change the prompt configuration to your liking by editing
 ipython_config.py.
 
 .. _string_lists:
 
 String lists
 ============
 
 String lists (IPython.utils.text.SList) are handy way to process output
 from system commands. They are produced by ``var = !cmd`` syntax.
 
 First, we acquire the output of 'ls -l'::
 
     [Q:doc/examples]|2> lines = !ls -l
      ==
     ['total 23',
      '-rw-rw-rw- 1 ville None 1163 Sep 30  2006 example-demo.py',
      '-rw-rw-rw- 1 ville None 1927 Sep 30  2006 example-embed-short.py',
      '-rwxrwxrwx 1 ville None 4606 Sep  1 17:15 example-embed.py',
      '-rwxrwxrwx 1 ville None 1017 Sep 30  2006 example-gnuplot.py',
      '-rwxrwxrwx 1 ville None  339 Jun 11 18:01 extension.py',
      '-rwxrwxrwx 1 ville None  113 Dec 20  2006 seteditor.py',
      '-rwxrwxrwx 1 ville None  245 Dec 12  2006 seteditor.pyc']
 
 Now, let's take a look at the contents of 'lines' (the first number is
 the list element number)::
 
     [Q:doc/examples]|3> lines
                     <3> SList (.p, .n, .l, .s, .grep(), .fields() available). Value:
 
     0: total 23
     1: -rw-rw-rw- 1 ville None 1163 Sep 30  2006 example-demo.py
     2: -rw-rw-rw- 1 ville None 1927 Sep 30  2006 example-embed-short.py
     3: -rwxrwxrwx 1 ville None 4606 Sep  1 17:15 example-embed.py
     4: -rwxrwxrwx 1 ville None 1017 Sep 30  2006 example-gnuplot.py
     5: -rwxrwxrwx 1 ville None  339 Jun 11 18:01 extension.py
     6: -rwxrwxrwx 1 ville None  113 Dec 20  2006 seteditor.py
     7: -rwxrwxrwx 1 ville None  245 Dec 12  2006 seteditor.pyc
 
 Now, let's filter out the 'embed' lines::
 
     [Q:doc/examples]|4> l2 = lines.grep('embed',prune=1)
     [Q:doc/examples]|5> l2
                     <5> SList (.p, .n, .l, .s, .grep(), .fields() available). Value:
 
     0: total 23
     1: -rw-rw-rw- 1 ville None 1163 Sep 30  2006 example-demo.py
     2: -rwxrwxrwx 1 ville None 1017 Sep 30  2006 example-gnuplot.py
     3: -rwxrwxrwx 1 ville None  339 Jun 11 18:01 extension.py
     4: -rwxrwxrwx 1 ville None  113 Dec 20  2006 seteditor.py
     5: -rwxrwxrwx 1 ville None  245 Dec 12  2006 seteditor.pyc
 
 Now, we want strings having just file names and permissions::
 
     [Q:doc/examples]|6> l2.fields(8,0)
                     <6> SList (.p, .n, .l, .s, .grep(), .fields() available). Value:
 
     0: total
     1: example-demo.py -rw-rw-rw-
     2: example-gnuplot.py -rwxrwxrwx
     3: extension.py -rwxrwxrwx
     4: seteditor.py -rwxrwxrwx
     5: seteditor.pyc -rwxrwxrwx
 
 Note how the line with 'total' does not raise IndexError.
 
 If you want to split these (yielding lists), call fields() without
 arguments::
 
     [Q:doc/examples]|7> _.fields()
                     <7>
     [['total'],
      ['example-demo.py', '-rw-rw-rw-'],
      ['example-gnuplot.py', '-rwxrwxrwx'],
      ['extension.py', '-rwxrwxrwx'],
      ['seteditor.py', '-rwxrwxrwx'],
      ['seteditor.pyc', '-rwxrwxrwx']]
 
 If you want to pass these separated with spaces to a command (typical
 for lists if files), use the .s property::
 
 
     [Q:doc/examples]|13> files = l2.fields(8).s
     [Q:doc/examples]|14> files
                     <14> 'example-demo.py example-gnuplot.py extension.py seteditor.py seteditor.pyc'
     [Q:doc/examples]|15> ls $files
     example-demo.py  example-gnuplot.py  extension.py  seteditor.py  seteditor.pyc
 
 SLists are inherited from normal python lists, so every list method is
 available::
 
     [Q:doc/examples]|21> lines.append('hey')
 
 
 Real world example: remove all files outside version control
 ------------------------------------------------------------
 
 First, capture output of "hg status"::
 
     [Q:/ipython]|28> out = !hg status
      ==
     ['M IPython\\extensions\\ipy_kitcfg.py',
      'M IPython\\extensions\\ipy_rehashdir.py',
     ...
      '? build\\lib\\IPython\\Debugger.py',
      '? build\\lib\\IPython\\extensions\\InterpreterExec.py',
      '? build\\lib\\IPython\\extensions\\InterpreterPasteInput.py',
     ...
 
 (lines starting with ? are not under version control).
 
 ::
 
     [Q:/ipython]|35> junk = out.grep(r'^\?').fields(1)
     [Q:/ipython]|36> junk
                 <36> SList (.p, .n, .l, .s, .grep(), .fields() availab
     ...
     10: build\bdist.win32\winexe\temp\_ctypes.py
     11: build\bdist.win32\winexe\temp\_hashlib.py
     12: build\bdist.win32\winexe\temp\_socket.py
 
 Now we can just remove these files by doing 'rm $junk.s'. 
 
 The .s, .n, .p properties
 -------------------------
 
 The ``.s`` property returns one string where lines are separated by
 single space (for convenient passing to system commands). The ``.n``
 property return one string where the lines are separated by a newline
 (i.e. the original output of the function). If the items in string
 list are file names, ``.p`` can be used to get a list of "path" objects
 for convenient file manipulation.