Magic.py
2707 lines
| 103.9 KiB
| text/x-python
|
PythonLexer
/ IPython / Magic.py
fperez
|
r0 | # -*- coding: utf-8 -*- | ||
"""Magic functions for InteractiveShell. | ||||
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r85 | $Id: Magic.py 991 2006-01-04 18:15:34Z fperez $""" | ||
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r0 | |||
#***************************************************************************** | ||||
# Copyright (C) 2001 Janko Hauser <jhauser@zscout.de> and | ||||
# Copyright (C) 2001-2004 Fernando Perez <fperez@colorado.edu> | ||||
# | ||||
# 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__ | ||||
fperez
|
r52 | import bdb | ||
import inspect | ||||
import os | ||||
import pdb | ||||
import pydoc | ||||
import sys | ||||
import re | ||||
import tempfile | ||||
import time | ||||
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r62 | import cPickle as pickle | ||
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r52 | from cStringIO import StringIO | ||
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r46 | from getopt import getopt | ||
from pprint import pprint, pformat | ||||
# profile isn't bundled by default in Debian for license reasons | ||||
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|
r0 | try: | ||
import profile,pstats | ||||
except ImportError: | ||||
profile = pstats = None | ||||
# Homebrewed | ||||
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r52 | from IPython import Debugger, OInspect, wildcard | ||
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r0 | from IPython.FakeModule import FakeModule | ||
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r52 | from IPython.Itpl import Itpl, itpl, printpl,itplns | ||
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r29 | from IPython.PyColorize import Parser | ||
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r52 | from IPython.Struct import Struct | ||
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r69 | from IPython.macro import Macro | ||
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r0 | from IPython.genutils import * | ||
#*************************************************************************** | ||||
# Utility functions | ||||
def on_off(tag): | ||||
"""Return an ON/OFF string for a 1/0 input. Simple utility function.""" | ||||
return ['OFF','ON'][tag] | ||||
#*************************************************************************** | ||||
# 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 | ||||
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r60 | self.shell = shell | ||
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r0 | |||
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.""") | ||||
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r60 | |||
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r0 | 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): | ||||
"""Return as a string a set of input history 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 | ||||
fperez
|
r80 | arguments as strings. | ||
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).""" | ||||
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r0 | |||
cmds = [] | ||||
for chunk in slices: | ||||
if ':' in chunk: | ||||
ini,fin = map(int,chunk.split(':')) | ||||
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|
r80 | elif '-' in chunk: | ||
ini,fin = map(int,chunk.split('-')) | ||||
fin += 1 | ||||
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r0 | else: | ||
ini = int(chunk) | ||||
fin = ini+1 | ||||
cmds.append(self.shell.input_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} | ||||
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r69 | |||
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r0 | def arg_err(self,func): | ||
"""Print docstring if incorrect arguments were passed""" | ||||
print 'Error in arguments:' | ||||
print OInspect.getdoc(func) | ||||
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r67 | def format_latex(self,strng): | ||
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r0 | """Format a string for latex inclusion.""" | ||
# Characters that need to be escaped for latex: | ||||
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r67 | escape_re = re.compile(r'(%|_|\$|#)',re.MULTILINE) | ||
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r0 | # 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) | ||||
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r67 | # The "\n" symbol | ||
newline_re = re.compile(r'\\n') | ||||
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r0 | |||
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r67 | # Now build the string for output: | ||
strng = cmd_name_re.sub(r'\n\\texttt{\\textsl{\\large \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): | ||||
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r0 | """Format a string for screen printing. | ||
This removes some latex-type format codes.""" | ||||
# Paragraph continue | ||||
par_re = re.compile(r'\\$',re.MULTILINE) | ||||
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r67 | strng = par_re.sub('',strng) | ||
return strng | ||||
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r0 | |||
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. | ||||
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r41 | 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. | ||||
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r0 | |||
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) | ||||
# Do regular option processing | ||||
opts,args = getopt(argv,opt_str,*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' | ||||
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 | ||||
magic_docs.append('%s%s:\n\t%s\n' %(self.shell.ESC_MAGIC, | ||||
fname,fn.__doc__)) | ||||
magic_docs = ''.join(magic_docs) | ||||
if mode == 'latex': | ||||
print self.format_latex(magic_docs) | ||||
return | ||||
else: | ||||
magic_docs = self.format_screen(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. | ||||
fperez
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r84 | This cycles the autocall command line through its three valid values | ||
(0->Off, 1->Smart, 2->Full)""" | ||||
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r0 | |||
rc = self.shell.rc | ||||
rc.autocall = not rc.autocall | ||||
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r84 | print "Automatic calling is:",['OFF','Smart','Full'][rc.autocall] | ||
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r0 | |||
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 [-n] -> print at most 40 inputs (some may be multi-line)\\ | ||||
%history [-n] n -> print at most n inputs\\ | ||||
%history [-n] 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. | ||||
If option -n is used, input numbers are not printed. 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.""" | ||||
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r78 | shell = self.shell | ||
if not shell.outputcache.do_full_cache: | ||||
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r0 | print 'This feature is only available if numbered prompts are in use.' | ||
return | ||||
opts,args = self.parse_options(parameter_s,'n',mode='list') | ||||
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r78 | input_hist = shell.input_hist | ||
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r0 | default_length = 40 | ||
if len(args) == 0: | ||||
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r78 | final = len(input_hist) | ||
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r0 | init = max(1,final-default_length) | ||
elif len(args) == 1: | ||||
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r78 | final = len(input_hist) | ||
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r0 | 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] | ||||
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r78 | multiline = int(inline.count('\n') > 1) | ||
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r0 | if print_nums: | ||
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r78 | print '%s:%s' % (str(in_num).ljust(width),line_sep[multiline]), | ||
print inline, | ||||
fperez
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r0 | |||
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 != 'ipmagic("r")\n' and \ | ||||
(input.startswith(start) or input.startswith(start_magic)): | ||||
#print 'match',`input` # dbg | ||||
print 'Executing:',input, | ||||
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r60 | self.shell.runlines(input) | ||
fperez
|
r0 | 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 | ||||
fperez
|
r37 | 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. | ||||
fperez
|
r41 | %psearch [options] PATTERN [OBJECT TYPE] | ||
fperez
|
r37 | |||
Note: ? can be used as a synonym for %psearch, at the beginning or at | ||||
fperez
|
r41 | 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). | ||||
fperez
|
r37 | |||
Examples: | ||||
fperez
|
r41 | %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 | ||||
fperez
|
r37 | |||
Case sensitve search: | ||||
fperez
|
r41 | %psearch -c a* list all object beginning with lower case a | ||
fperez
|
r37 | |||
Show objects beginning with a single _: | ||||
fperez
|
r41 | %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] | ||||
fperez
|
r37 | |||
fperez
|
r41 | # Call the actual search | ||
try: | ||||
psearch(args,shell.ns_table,ns_search, | ||||
show_all=opt('a'),ignore_case=ignore_case) | ||||
except: | ||||
shell.showtraceback() | ||||
fperez
|
r0 | |||
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 | ||||
fperez
|
r82 | internal_ns = self.shell.internal_ns | ||
user_config_ns = self.shell.user_config_ns | ||||
fperez
|
r0 | out = [] | ||
typelist = parameter_s.split() | ||||
fperez
|
r82 | |||
for i in user_ns: | ||||
fperez
|
r0 | if not (i.startswith('_') or i.startswith('_i')) \ | ||
fperez
|
r82 | and not (i in internal_ns or i in user_config_ns): | ||
fperez
|
r0 | 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 | ||||
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 | ||||
fperez
|
r40 | get_vars = lambda i: self.shell.user_ns[i] | ||
fperez
|
r0 | type_name = lambda v: type(v).__name__ | ||
varlist = map(get_vars,varnames) | ||||
fperez
|
r69 | |||
typelist = [] | ||||
for vv in varlist: | ||||
tt = type_name(vv) | ||||
if tt=='instance': | ||||
typelist.append(str(vv.__class__)) | ||||
else: | ||||
typelist.append(tt) | ||||
fperez
|
r0 | # 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: | ||||
fperez
|
r69 | vstr = str(var).replace('\n','\\n') | ||
fperez
|
r0 | 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 | ||||
fperez
|
r40 | user_ns = self.shell.user_ns | ||
fperez
|
r0 | for i in self.magic_who_ls(): | ||
fperez
|
r40 | del(user_ns[i]) | ||
fperez
|
r0 | |||
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. | ||||
fperez
|
r60 | %logstart [-o|-t] [log_name [log_mode]] | ||
fperez
|
r0 | |||
fperez
|
r60 | If no name is given, it defaults to a file named 'ipython_log.py' in your | ||
fperez
|
r0 | 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.\\ | ||||
fperez
|
r60 | backup: rename (if exists) to name~ and start name.\\ | ||
global: single logfile in your home dir, appended to.\\ | ||||
over : overwrite existing log.\\ | ||||
fperez
|
r0 | rotate: create rotating logs name.1~, name.2~, etc. | ||
fperez
|
r60 | 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 | ||||
fperez
|
r68 | prepended with a '#[Out]# ' marker, so that the log remains valid | ||
fperez
|
r60 | Python code. | ||
fperez
|
r68 | 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 | ||||
fperez
|
r60 | -t: put timestamps before each input line logged (these are put in | ||
comments).""" | ||||
fperez
|
r0 | |||
fperez
|
r60 | opts,par = self.parse_options(parameter_s,'ot') | ||
log_output = 'o' in opts | ||||
timestamp = 't' in opts | ||||
fperez
|
r0 | |||
fperez
|
r60 | 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: | ||||
fperez
|
r0 | try: | ||
fperez
|
r60 | logfname,logmode = par.split() | ||
fperez
|
r0 | except: | ||
fperez
|
r60 | 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) | ||||
fperez
|
r0 | try: | ||
fperez
|
r60 | started = logger.logstart(logfname,loghead,logmode, | ||
log_output,timestamp) | ||||
fperez
|
r0 | except: | ||
fperez
|
r60 | 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() | ||||
fperez
|
r0 | def magic_logoff(self,parameter_s=''): | ||
"""Temporarily stop logging. | ||||
You must have previously started logging.""" | ||||
fperez
|
r60 | self.shell.logger.switch_log(0) | ||
fperez
|
r0 | |||
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.""" | ||||
fperez
|
r60 | self.shell.logger.switch_log(1) | ||
fperez
|
r0 | |||
def magic_logstate(self,parameter_s=''): | ||||
"""Print the status of the logging system.""" | ||||
fperez
|
r60 | self.shell.logger.logstate() | ||
fperez
|
r0 | |||
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: | ||||
fperez
|
r60 | new_pdb = {'off':0,'0':0,'on':1,'1':1}[par] | ||
fperez
|
r0 | except KeyError: | ||
fperez
|
r60 | print ('Incorrect argument. Use on/1, off/0, ' | ||
'or nothing for a toggle.') | ||||
fperez
|
r0 | return | ||
else: | ||||
fperez
|
r60 | # toggle | ||
fperez
|
r59 | new_pdb = not self.shell.InteractiveTB.call_pdb | ||
fperez
|
r0 | |||
fperez
|
r60 | # set on the shell | ||
self.shell.call_pdb = new_pdb | ||||
print 'Automatic pdb calling has been turned',on_off(new_pdb) | ||||
fperez
|
r0 | |||
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 ipmagic function (which IPython automatically adds to the | ||||
builtins):\\ | ||||
In [3]: stats = ipmagic('prun','-r print 4') | ||||
You can type ipmagic? for more details on ipmagic. | ||||
-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} | ||||
fperez
|
r78 | # 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 | ||||
fperez
|
r0 | 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'): | ||||
fperez
|
r46 | deb = Debugger.Pdb(self.shell.rc.colors) | ||
fperez
|
r0 | # 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", | ||||
fperez
|
r46 | 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) | ||||
fperez
|
r0 | 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 | ||||
fperez
|
r78 | if restore_main: | ||
sys.modules['__main__'] = restore_main | ||||
fperez
|
r0 | 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_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. | ||||
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:\\ | ||||
fperez
|
r80 | %macro name n1-n2 n3-n4 ... n5 .. n6 ... | ||
fperez
|
r0 | |||
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. | ||||
fperez
|
r80 | 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. | ||||
fperez
|
r0 | |||
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: | ||||
fperez
|
r80 | In [51]: %macro my_macro 44-47 49 | ||
fperez
|
r0 | |||
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]""" | ||||
args = parameter_s.split() | ||||
name,ranges = args[0], args[1:] | ||||
#print 'rng',ranges # dbg | ||||
fperez
|
r60 | lines = self.extract_input_slices(ranges) | ||
macro = Macro(lines) | ||||
fperez
|
r0 | self.shell.user_ns.update({name:macro}) | ||
print 'Macro `%s` created. To execute, type its name (without quotes).' % name | ||||
print 'Macro contents:' | ||||
fperez
|
r69 | print macro, | ||
fperez
|
r0 | |||
def magic_save(self,parameter_s = ''): | ||||
"""Save a set of lines to a given filename. | ||||
Usage:\\ | ||||
fperez
|
r80 | %save filename n1-n2 n3-n4 ... n5 .. n6 ... | ||
fperez
|
r0 | |||
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.""" | ||||
args = parameter_s.split() | ||||
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)) | ||||
f = file(fname,'w') | ||||
f.write(cmds) | ||||
f.close() | ||||
print 'The following commands were written to file `%s`:' % fname | ||||
print cmds | ||||
fperez
|
r82 | 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=''): | ||||
fperez
|
r0 | """Alias to %edit.""" | ||
return self.magic_edit(parameter_s) | ||||
fperez
|
r82 | def magic_edit(self,parameter_s='',last_call=['','']): | ||
fperez
|
r0 | """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. | ||||
-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. | ||||
fperez
|
r82 | 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. | ||||
fperez
|
r0 | 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,'px') | ||||
# Default line number value | ||||
lineno = None | ||||
if opts.has_key('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.has_key('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)) | ||||
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 | ||||
fperez
|
r82 | |||
fperez
|
r0 | 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 | ||||
fperez
|
r82 | |||
fperez
|
r0 | data = '' | ||
use_temp = 0 | ||||
except DataIsObject: | ||||
fperez
|
r82 | |||
# macros have a special edit function | ||||
if isinstance(data,Macro): | ||||
self._edit_macro(args,data) | ||||
return | ||||
fperez
|
r0 | # 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: | ||||
fperez
|
r82 | filename = self.shell.mktempfile(data) | ||
fperez
|
r0 | |||
# do actual editing here | ||||
print 'Editing...', | ||||
sys.stdout.flush() | ||||
self.shell.hooks.editor(filename,lineno) | ||||
if opts.has_key('x'): # -x prevents actual execution | ||||
else: | ||||
print 'done. Executing edited code...' | ||||
try: | ||||
fperez
|
r54 | self.shell.safe_execfile(filename,self.shell.user_ns) | ||
fperez
|
r0 | except IOError,msg: | ||
if msg.filename == filename: | ||||
warn('File not found. Did you forget to save?') | ||||
return | ||||
else: | ||||
self.shell.showtraceback() | ||||
except: | ||||
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.""" | ||||
fperez
|
r59 | def xmode_switch_err(name): | ||
warn('Error changing %s exception modes.\n%s' % | ||||
(name,sys.exc_info()[1])) | ||||
fperez
|
r60 | shell = self.shell | ||
fperez
|
r0 | new_mode = parameter_s.strip().capitalize() | ||
try: | ||||
fperez
|
r60 | shell.InteractiveTB.set_mode(mode=new_mode) | ||
print 'Exception reporting mode:',shell.InteractiveTB.mode | ||||
fperez
|
r0 | except: | ||
fperez
|
r59 | xmode_switch_err('user') | ||
# threaded shells use a special handler in sys.excepthook | ||||
fperez
|
r60 | if shell.isthreaded: | ||
fperez
|
r59 | try: | ||
fperez
|
r60 | shell.sys_excepthook.set_mode(mode=new_mode) | ||
fperez
|
r59 | except: | ||
xmode_switch_err('threaded') | ||||
fperez
|
r0 | |||
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.""" | ||||
fperez
|
r59 | |||
def color_switch_err(name): | ||||
warn('Error changing %s color schemes.\n%s' % | ||||
(name,sys.exc_info()[1])) | ||||
fperez
|
r0 | |||
new_scheme = parameter_s.strip() | ||||
if not new_scheme: | ||||
print 'You must specify a color scheme.' | ||||
return | ||||
# Under Windows, check for Gary Bishop's readline, which is necessary | ||||
# for ANSI coloring | ||||
if os.name in ['nt','dos']: | ||||
try: | ||||
import readline | ||||
except ImportError: | ||||
has_readline = 0 | ||||
else: | ||||
try: | ||||
readline.GetOutputFile() | ||||
except AttributeError: | ||||
has_readline = 0 | ||||
else: | ||||
has_readline = 1 | ||||
if not has_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) | ||||
fperez
|
r60 | # local shortcut | ||
shell = self.shell | ||||
fperez
|
r0 | |||
# Set prompt colors | ||||
try: | ||||
fperez
|
r60 | shell.outputcache.set_colors(new_scheme) | ||
fperez
|
r0 | except: | ||
fperez
|
r59 | color_switch_err('prompt') | ||
fperez
|
r0 | else: | ||
fperez
|
r60 | shell.rc.colors = \ | ||
shell.outputcache.color_table.active_scheme_name | ||||
fperez
|
r0 | # Set exception colors | ||
try: | ||||
fperez
|
r60 | shell.InteractiveTB.set_colors(scheme = new_scheme) | ||
shell.SyntaxTB.set_colors(scheme = new_scheme) | ||||
fperez
|
r0 | except: | ||
fperez
|
r59 | color_switch_err('exception') | ||
# threaded shells use a verbose traceback in sys.excepthook | ||||
fperez
|
r60 | if shell.isthreaded: | ||
fperez
|
r59 | try: | ||
fperez
|
r60 | shell.sys_excepthook.set_colors(scheme=new_scheme) | ||
fperez
|
r59 | except: | ||
color_switch_err('system exception handler') | ||||
fperez
|
r0 | # Set info (for 'object?') colors | ||
fperez
|
r60 | if shell.rc.color_info: | ||
fperez
|
r0 | try: | ||
fperez
|
r60 | shell.inspector.set_active_scheme(new_scheme) | ||
fperez
|
r0 | except: | ||
fperez
|
r59 | color_switch_err('object inspector') | ||
fperez
|
r0 | else: | ||
fperez
|
r60 | shell.inspector.set_active_scheme('NoColor') | ||
fperez
|
r0 | |||
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.outputcache.Pprint = 1 - self.shell.outputcache.Pprint | ||||
print 'Pretty printing has been turned', \ | ||||
['OFF','ON'][self.shell.outputcache.Pprint] | ||||
fperez
|
r56 | 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() | ||||
fperez
|
r0 | 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() | ||||
for alias in aliases: | ||||
print prechar+alias+'\t\t'+atab[alias][1] | ||||
print '-'*30+'\nTotal number of aliases:',len(aliases) | ||||
return | ||||
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=1) | ||||
# 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 $PATH is a file | ||||
with execute access (os.X_OK), so it is much slower than %rehash. | ||||
Under Windows, it checks executability as a match agains a | ||||
'|'-separated string of extensions, stored in the IPython config | ||||
variable win_exec_ext. This defaults to 'exe|com|bat'. """ | ||||
path = filter(os.path.isdir,os.environ['PATH'].split(os.pathsep)) | ||||
alias_table = self.shell.alias_table | ||||
if os.name == 'posix': | ||||
isexec = lambda fname:os.path.isfile(fname) and \ | ||||
os.access(fname,os.X_OK) | ||||
else: | ||||
try: | ||||
winext = os.environ['pathext'].replace(';','|').replace('.','') | ||||
except KeyError: | ||||
winext = 'exe|com|bat' | ||||
execre = re.compile(r'(.*)\.(%s)$' % 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) | ||||
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) | ||||
# 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() | ||||
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: | ||||
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 | ||||
elif opts.has_key('b') or (bkms.has_key(ps) and not os.path.isdir(ps)): | ||||
if bkms.has_key(ps): | ||||
target = bkms[ps] | ||||
print '(bookmark:%s) -> %s' % (ps,target) | ||||
ps = target | ||||
else: | ||||
if bkms: | ||||
error("Bookmark '%s' not found. " | ||||
fperez
|
r85 | "Use '%%bookmark -l' to see your bookmarks." % ps) | ||
fperez
|
r0 | else: | ||
print "Bookmarks not set - use %bookmark <bookmarkname>" | ||||
return | ||||
# at this point ps should point to the target dir | ||||
if ps: | ||||
try: | ||||
os.chdir(os.path.expanduser(ps)) | ||||
except OSError: | ||||
print sys.exc_info()[1] | ||||
else: | ||||
self.shell.user_ns['_dh'].append(os.getcwd()) | ||||
else: | ||||
fperez
|
r60 | os.chdir(self.shell.home_dir) | ||
fperez
|
r0 | 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 = '~' | ||||
fperez
|
r60 | 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]): | ||||
fperez
|
r0 | try: | ||
self.magic_cd(parameter_s) | ||||
fperez
|
r60 | dir_s.insert(0,os.getcwd().replace(self.home_dir,'~')) | ||
fperez
|
r0 | 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. | ||||
""" | ||||
fperez
|
r60 | 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] | ||||
fperez
|
r0 | else: | ||
print "You can't remove the starting directory from the stack:",\ | ||||
fperez
|
r60 | self.shell.dir_stack | ||
fperez
|
r0 | |||
def magic_dirs(self, parameter_s=''): | ||||
"""Return the current directory stack.""" | ||||
fperez
|
r60 | return self.shell.dir_stack[:] | ||
fperez
|
r0 | |||
def magic_sc(self, parameter_s=''): | ||||
"""Shell capture - execute a shell command and capture its output. | ||||
%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. | ||||
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 not var: | ||||
error('you must specify a variable to assign the command to.') | ||||
return | ||||
# 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)) | ||||
self.shell.user_ns.update({var: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) | ||||
fperez
|
r62 | def magic_store(self, parameter_s=''): | ||
fperez
|
r63 | """Lightweight persistence for python variables. | ||
fperez
|
r62 | |||
Example: | ||||
fperez
|
r63 | ville@badger[~]|1> A = ['hello',10,'world']\\ | ||
ville@badger[~]|2> %store A\\ | ||||
fperez
|
r62 | ville@badger[~]|3> Exit | ||
(IPython session is closed and started again...) | ||||
fperez
|
r63 | ville@badger:~$ ipython -p pysh\\ | ||
fperez
|
r62 | ville@badger[~]|1> print A | ||
['hello', 10, 'world'] | ||||
Usage: | ||||
fperez
|
r82 | %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 -r - Remove all variables from storage | ||||
fperez
|
r62 | |||
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. | ||||
""" | ||||
fperez
|
r64 | |||
fperez
|
r62 | opts,args = self.parse_options(parameter_s,'dr',mode='list') | ||
# delete | ||||
if opts.has_key('d'): | ||||
try: | ||||
todel = args[0] | ||||
except IndexError: | ||||
error('You must provide the variable to forget') | ||||
else: | ||||
try: | ||||
del self.shell.persist['S:' + todel] | ||||
except: | ||||
error("Can't delete variable '%s'" % todel) | ||||
# reset | ||||
elif opts.has_key('r'): | ||||
for k in self.shell.persist.keys(): | ||||
if k.startswith('S:'): | ||||
del self.shell.persist[k] | ||||
fperez
|
r64 | |||
fperez
|
r62 | # run without arguments -> list variables & values | ||
elif not args: | ||||
fperez
|
r64 | vars = [v[2:] for v in self.shell.persist.keys() | ||
if v.startswith('S:')] | ||||
fperez
|
r62 | vars.sort() | ||
if vars: | ||||
size = max(map(len,vars)) | ||||
else: | ||||
size = 0 | ||||
print 'Stored variables and their in-memory values:' | ||||
fperez
|
r64 | fmt = '%-'+str(size)+'s -> %s' | ||
get = self.shell.user_ns.get | ||||
fperez
|
r62 | for var in vars: | ||
# print 30 first characters from every var | ||||
fperez
|
r64 | print fmt % (var,repr(get(var,'<unavailable>'))[:50]) | ||
fperez
|
r62 | |||
# default action - store the variable | ||||
else: | ||||
pickled = pickle.dumps(self.shell.user_ns[args[0] ]) | ||||
self.shell.persist[ 'S:' + args[0] ] = pickled | ||||
print "Stored '%s' (%d bytes)" % (args[0], len(pickled)) | ||||
fperez
|
r64 | |||
fperez
|
r0 | 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.shell.persist.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] | ||||
fperez
|
r60 | self.shell.persist['bookmarks'] = bkms | ||
fperez
|
r29 | |||
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. """ | ||||
fperez
|
r31 | filename = get_py_filename(parameter_s) | ||
page(self.shell.colorize(file_read(filename)), | ||||
screen_lines=self.shell.rc.screen_length) | ||||
fperez
|
r29 | |||
fperez
|
r0 | # end Magic | ||