|
|
"""Implementation of code management magic functions.
|
|
|
"""
|
|
|
from __future__ import print_function
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (c) 2012 The IPython Development Team.
|
|
|
#
|
|
|
# Distributed under the terms of the Modified BSD License.
|
|
|
#
|
|
|
# The full license is in the file COPYING.txt, distributed with this software.
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
# Stdlib
|
|
|
import inspect
|
|
|
import io
|
|
|
import os
|
|
|
import re
|
|
|
import sys
|
|
|
import ast
|
|
|
from itertools import chain
|
|
|
|
|
|
# Our own packages
|
|
|
from IPython.core.error import TryNext, StdinNotImplementedError, UsageError
|
|
|
from IPython.core.macro import Macro
|
|
|
from IPython.core.magic import Magics, magics_class, line_magic
|
|
|
from IPython.core.oinspect import find_file, find_source_lines
|
|
|
from IPython.testing.skipdoctest import skip_doctest
|
|
|
from IPython.utils import py3compat
|
|
|
from IPython.utils.py3compat import string_types
|
|
|
from IPython.utils.contexts import preserve_keys
|
|
|
from IPython.utils.path import get_py_filename, unquote_filename
|
|
|
from IPython.utils.warn import warn, error
|
|
|
from IPython.utils.text import get_text_list
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Magic implementation classes
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
# Used for exception handling in magic_edit
|
|
|
class MacroToEdit(ValueError): pass
|
|
|
|
|
|
ipython_input_pat = re.compile(r"<ipython\-input\-(\d+)-[a-z\d]+>$")
|
|
|
|
|
|
# To match, e.g. 8-10 1:5 :10 3-
|
|
|
range_re = re.compile(r"""
|
|
|
(?P<start>\d+)?
|
|
|
((?P<sep>[\-:])
|
|
|
(?P<end>\d+)?)?
|
|
|
$""", re.VERBOSE)
|
|
|
|
|
|
|
|
|
def extract_code_ranges(ranges_str):
|
|
|
"""Turn a string of range for %%load into 2-tuples of (start, stop)
|
|
|
ready to use as a slice of the content splitted by lines.
|
|
|
|
|
|
Examples
|
|
|
--------
|
|
|
list(extract_input_ranges("5-10 2"))
|
|
|
[(4, 10), (1, 2)]
|
|
|
"""
|
|
|
for range_str in ranges_str.split():
|
|
|
rmatch = range_re.match(range_str)
|
|
|
if not rmatch:
|
|
|
continue
|
|
|
sep = rmatch.group("sep")
|
|
|
start = rmatch.group("start")
|
|
|
end = rmatch.group("end")
|
|
|
|
|
|
if sep == '-':
|
|
|
start = int(start) - 1 if start else None
|
|
|
end = int(end) if end else None
|
|
|
elif sep == ':':
|
|
|
start = int(start) - 1 if start else None
|
|
|
end = int(end) - 1 if end else None
|
|
|
else:
|
|
|
end = int(start)
|
|
|
start = int(start) - 1
|
|
|
yield (start, end)
|
|
|
|
|
|
|
|
|
@skip_doctest
|
|
|
def extract_symbols(code, symbols):
|
|
|
"""
|
|
|
Return a tuple (blocks, not_found)
|
|
|
where ``blocks`` is a list of code fragments
|
|
|
for each symbol parsed from code, and ``not_found`` are
|
|
|
symbols not found in the code.
|
|
|
|
|
|
For example::
|
|
|
|
|
|
>>> code = '''a = 10
|
|
|
|
|
|
def b(): return 42
|
|
|
|
|
|
class A: pass'''
|
|
|
|
|
|
>>> extract_symbols(code, 'A,b,z')
|
|
|
(["class A: pass", "def b(): return 42"], ['z'])
|
|
|
"""
|
|
|
symbols = symbols.split(',')
|
|
|
|
|
|
# this will raise SyntaxError if code isn't valid Python
|
|
|
py_code = ast.parse(code)
|
|
|
|
|
|
marks = [(getattr(s, 'name', None), s.lineno) for s in py_code.body]
|
|
|
code = code.split('\n')
|
|
|
|
|
|
symbols_lines = {}
|
|
|
|
|
|
# we already know the start_lineno of each symbol (marks).
|
|
|
# To find each end_lineno, we traverse in reverse order until each
|
|
|
# non-blank line
|
|
|
end = len(code)
|
|
|
for name, start in reversed(marks):
|
|
|
while not code[end - 1].strip():
|
|
|
end -= 1
|
|
|
if name:
|
|
|
symbols_lines[name] = (start - 1, end)
|
|
|
end = start - 1
|
|
|
|
|
|
# Now symbols_lines is a map
|
|
|
# {'symbol_name': (start_lineno, end_lineno), ...}
|
|
|
|
|
|
# fill a list with chunks of codes for each requested symbol
|
|
|
blocks = []
|
|
|
not_found = []
|
|
|
for symbol in symbols:
|
|
|
if symbol in symbols_lines:
|
|
|
start, end = symbols_lines[symbol]
|
|
|
blocks.append('\n'.join(code[start:end]) + '\n')
|
|
|
else:
|
|
|
not_found.append(symbol)
|
|
|
|
|
|
return blocks, not_found
|
|
|
|
|
|
|
|
|
class InteractivelyDefined(Exception):
|
|
|
"""Exception for interactively defined variable in magic_edit"""
|
|
|
def __init__(self, index):
|
|
|
self.index = index
|
|
|
|
|
|
|
|
|
@magics_class
|
|
|
class CodeMagics(Magics):
|
|
|
"""Magics related to code management (loading, saving, editing, ...)."""
|
|
|
|
|
|
@line_magic
|
|
|
def save(self, parameter_s=''):
|
|
|
"""Save a set of lines or a macro to a given filename.
|
|
|
|
|
|
Usage:\\
|
|
|
%save [options] filename n1-n2 n3-n4 ... n5 .. n6 ...
|
|
|
|
|
|
Options:
|
|
|
|
|
|
-r: use 'raw' input. By default, the 'processed' history is used,
|
|
|
so that magics are loaded in their transformed version to valid
|
|
|
Python. If this option is given, the raw input as typed as the
|
|
|
command line is used instead.
|
|
|
|
|
|
-f: force overwrite. If file exists, %save will prompt for overwrite
|
|
|
unless -f is given.
|
|
|
|
|
|
-a: append to the file instead of overwriting it.
|
|
|
|
|
|
This function uses the same syntax as %history for input ranges,
|
|
|
then saves the lines 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.
|
|
|
|
|
|
If `-r` option is used, the default extension is `.ipy`.
|
|
|
"""
|
|
|
|
|
|
opts,args = self.parse_options(parameter_s,'fra',mode='list')
|
|
|
if not args:
|
|
|
raise UsageError('Missing filename.')
|
|
|
raw = 'r' in opts
|
|
|
force = 'f' in opts
|
|
|
append = 'a' in opts
|
|
|
mode = 'a' if append else 'w'
|
|
|
ext = u'.ipy' if raw else u'.py'
|
|
|
fname, codefrom = unquote_filename(args[0]), " ".join(args[1:])
|
|
|
if not fname.endswith((u'.py',u'.ipy')):
|
|
|
fname += ext
|
|
|
file_exists = os.path.isfile(fname)
|
|
|
if file_exists and not force and not append:
|
|
|
try:
|
|
|
overwrite = self.shell.ask_yes_no('File `%s` exists. Overwrite (y/[N])? ' % fname, default='n')
|
|
|
except StdinNotImplementedError:
|
|
|
print("File `%s` exists. Use `%%save -f %s` to force overwrite" % (fname, parameter_s))
|
|
|
return
|
|
|
if not overwrite :
|
|
|
print('Operation cancelled.')
|
|
|
return
|
|
|
try:
|
|
|
cmds = self.shell.find_user_code(codefrom,raw)
|
|
|
except (TypeError, ValueError) as e:
|
|
|
print(e.args[0])
|
|
|
return
|
|
|
out = py3compat.cast_unicode(cmds)
|
|
|
with io.open(fname, mode, encoding="utf-8") as f:
|
|
|
if not file_exists or not append:
|
|
|
f.write(u"# coding: utf-8\n")
|
|
|
f.write(out)
|
|
|
# make sure we end on a newline
|
|
|
if not out.endswith(u'\n'):
|
|
|
f.write(u'\n')
|
|
|
print('The following commands were written to file `%s`:' % fname)
|
|
|
print(cmds)
|
|
|
|
|
|
@line_magic
|
|
|
def pastebin(self, parameter_s=''):
|
|
|
"""Upload code to Github's Gist paste bin, returning the URL.
|
|
|
|
|
|
Usage:\\
|
|
|
%pastebin [-d "Custom description"] 1-7
|
|
|
|
|
|
The argument can be an input history range, a filename, or the name of a
|
|
|
string or macro.
|
|
|
|
|
|
Options:
|
|
|
|
|
|
-d: Pass a custom description for the gist. The default will say
|
|
|
"Pasted from IPython".
|
|
|
"""
|
|
|
opts, args = self.parse_options(parameter_s, 'd:')
|
|
|
|
|
|
try:
|
|
|
code = self.shell.find_user_code(args)
|
|
|
except (ValueError, TypeError) as e:
|
|
|
print(e.args[0])
|
|
|
return
|
|
|
|
|
|
# Deferred import
|
|
|
try:
|
|
|
from urllib.request import urlopen # Py 3
|
|
|
except ImportError:
|
|
|
from urllib2 import urlopen
|
|
|
import json
|
|
|
post_data = json.dumps({
|
|
|
"description": opts.get('d', "Pasted from IPython"),
|
|
|
"public": True,
|
|
|
"files": {
|
|
|
"file1.py": {
|
|
|
"content": code
|
|
|
}
|
|
|
}
|
|
|
}).encode('utf-8')
|
|
|
|
|
|
response = urlopen("https://api.github.com/gists", post_data)
|
|
|
response_data = json.loads(response.read().decode('utf-8'))
|
|
|
return response_data['html_url']
|
|
|
|
|
|
@line_magic
|
|
|
def loadpy(self, arg_s):
|
|
|
"""Alias of `%load`
|
|
|
|
|
|
`%loadpy` has gained some flexibility and dropped the requirement of a `.py`
|
|
|
extension. So it has been renamed simply into %load. You can look at
|
|
|
`%load`'s docstring for more info.
|
|
|
"""
|
|
|
self.load(arg_s)
|
|
|
|
|
|
@line_magic
|
|
|
def load(self, arg_s):
|
|
|
"""Load code into the current frontend.
|
|
|
|
|
|
Usage:\\
|
|
|
%load [options] source
|
|
|
|
|
|
where source can be a filename, URL, input history range, macro, or
|
|
|
element in the user namespace
|
|
|
|
|
|
Options:
|
|
|
|
|
|
-r <lines>: Specify lines or ranges of lines to load from the source.
|
|
|
Ranges could be specified as x-y (x..y) or in python-style x:y
|
|
|
(x..(y-1)). Both limits x and y can be left blank (meaning the
|
|
|
beginning and end of the file, respectively).
|
|
|
|
|
|
-s <symbols>: Specify function or classes to load from python source.
|
|
|
|
|
|
-y : Don't ask confirmation for loading source above 200 000 characters.
|
|
|
|
|
|
-n : Include the user's namespace when searching for source code.
|
|
|
|
|
|
This magic command can either take a local filename, a URL, an history
|
|
|
range (see %history) or a macro as argument, it will prompt for
|
|
|
confirmation before loading source with more than 200 000 characters, unless
|
|
|
-y flag is passed or if the frontend does not support raw_input::
|
|
|
|
|
|
%load myscript.py
|
|
|
%load 7-27
|
|
|
%load myMacro
|
|
|
%load http://www.example.com/myscript.py
|
|
|
%load -r 5-10 myscript.py
|
|
|
%load -r 10-20,30,40: foo.py
|
|
|
%load -s MyClass,wonder_function myscript.py
|
|
|
%load -n MyClass
|
|
|
%load -n my_module.wonder_function
|
|
|
"""
|
|
|
opts,args = self.parse_options(arg_s,'yns:r:')
|
|
|
|
|
|
if not args:
|
|
|
raise UsageError('Missing filename, URL, input history range, '
|
|
|
'macro, or element in the user namespace.')
|
|
|
|
|
|
search_ns = 'n' in opts
|
|
|
|
|
|
contents = self.shell.find_user_code(args, search_ns=search_ns)
|
|
|
|
|
|
if 's' in opts:
|
|
|
try:
|
|
|
blocks, not_found = extract_symbols(contents, opts['s'])
|
|
|
except SyntaxError:
|
|
|
# non python code
|
|
|
error("Unable to parse the input as valid Python code")
|
|
|
return
|
|
|
|
|
|
if len(not_found) == 1:
|
|
|
warn('The symbol `%s` was not found' % not_found[0])
|
|
|
elif len(not_found) > 1:
|
|
|
warn('The symbols %s were not found' % get_text_list(not_found,
|
|
|
wrap_item_with='`')
|
|
|
)
|
|
|
|
|
|
contents = '\n'.join(blocks)
|
|
|
|
|
|
if 'r' in opts:
|
|
|
ranges = opts['r'].replace(',', ' ')
|
|
|
lines = contents.split('\n')
|
|
|
slices = extract_code_ranges(ranges)
|
|
|
contents = [lines[slice(*slc)] for slc in slices]
|
|
|
contents = '\n'.join(chain.from_iterable(contents))
|
|
|
|
|
|
l = len(contents)
|
|
|
|
|
|
# 200 000 is ~ 2500 full 80 caracter lines
|
|
|
# so in average, more than 5000 lines
|
|
|
if l > 200000 and 'y' not in opts:
|
|
|
try:
|
|
|
ans = self.shell.ask_yes_no(("The text you're trying to load seems pretty big"\
|
|
|
" (%d characters). Continue (y/[N]) ?" % l), default='n' )
|
|
|
except StdinNotImplementedError:
|
|
|
#asume yes if raw input not implemented
|
|
|
ans = True
|
|
|
|
|
|
if ans is False :
|
|
|
print('Operation cancelled.')
|
|
|
return
|
|
|
|
|
|
self.shell.set_next_input(contents)
|
|
|
|
|
|
@staticmethod
|
|
|
def _find_edit_target(shell, args, opts, last_call):
|
|
|
"""Utility method used by magic_edit to find what to edit."""
|
|
|
|
|
|
def make_filename(arg):
|
|
|
"Make a filename from the given args"
|
|
|
arg = unquote_filename(arg)
|
|
|
try:
|
|
|
filename = get_py_filename(arg)
|
|
|
except IOError:
|
|
|
# If it ends with .py but doesn't already exist, assume we want
|
|
|
# a new file.
|
|
|
if arg.endswith('.py'):
|
|
|
filename = arg
|
|
|
else:
|
|
|
filename = None
|
|
|
return filename
|
|
|
|
|
|
# Set a few locals from the options for convenience:
|
|
|
opts_prev = 'p' in opts
|
|
|
opts_raw = 'r' in opts
|
|
|
|
|
|
# custom exceptions
|
|
|
class DataIsObject(Exception): pass
|
|
|
|
|
|
# Default line number value
|
|
|
lineno = opts.get('n',None)
|
|
|
|
|
|
if opts_prev:
|
|
|
args = '_%s' % last_call[0]
|
|
|
if args not in shell.user_ns:
|
|
|
args = last_call[1]
|
|
|
|
|
|
# by default this is done with temp files, except when the given
|
|
|
# arg is a filename
|
|
|
use_temp = True
|
|
|
|
|
|
data = ''
|
|
|
|
|
|
# First, see if the arguments should be a filename.
|
|
|
filename = make_filename(args)
|
|
|
if filename:
|
|
|
use_temp = False
|
|
|
elif args:
|
|
|
# Mode where user specifies ranges of lines, like in %macro.
|
|
|
data = shell.extract_input_lines(args, opts_raw)
|
|
|
if not data:
|
|
|
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, shell.user_ns)
|
|
|
if not isinstance(data, string_types):
|
|
|
raise DataIsObject
|
|
|
|
|
|
except (NameError,SyntaxError):
|
|
|
# given argument is not a variable, try as a filename
|
|
|
filename = make_filename(args)
|
|
|
if filename is None:
|
|
|
warn("Argument given (%s) can't be found as a variable "
|
|
|
"or as a filename." % args)
|
|
|
return (None, None, None)
|
|
|
use_temp = False
|
|
|
|
|
|
except DataIsObject:
|
|
|
# macros have a special edit function
|
|
|
if isinstance(data, Macro):
|
|
|
raise MacroToEdit(data)
|
|
|
|
|
|
# For objects, try to edit the file where they are defined
|
|
|
filename = find_file(data)
|
|
|
if filename:
|
|
|
if 'fakemodule' in filename.lower() and \
|
|
|
inspect.isclass(data):
|
|
|
# class created by %edit? Try to find source
|
|
|
# by looking for method definitions instead, the
|
|
|
# __module__ in those classes is FakeModule.
|
|
|
attrs = [getattr(data, aname) for aname in dir(data)]
|
|
|
for attr in attrs:
|
|
|
if not inspect.ismethod(attr):
|
|
|
continue
|
|
|
filename = find_file(attr)
|
|
|
if filename and \
|
|
|
'fakemodule' not in filename.lower():
|
|
|
# change the attribute to be the edit
|
|
|
# target instead
|
|
|
data = attr
|
|
|
break
|
|
|
|
|
|
m = ipython_input_pat.match(os.path.basename(filename))
|
|
|
if m:
|
|
|
raise InteractivelyDefined(int(m.groups()[0]))
|
|
|
|
|
|
datafile = 1
|
|
|
if filename is None:
|
|
|
filename = make_filename(args)
|
|
|
datafile = 1
|
|
|
if filename is not None:
|
|
|
# only warn about this if we get a real name
|
|
|
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:
|
|
|
if lineno is None:
|
|
|
lineno = find_source_lines(data)
|
|
|
if lineno is None:
|
|
|
filename = make_filename(args)
|
|
|
if filename is None:
|
|
|
warn('The file where `%s` was defined '
|
|
|
'cannot be read or found.' % data)
|
|
|
return (None, None, None)
|
|
|
use_temp = False
|
|
|
|
|
|
if use_temp:
|
|
|
filename = shell.mktempfile(data)
|
|
|
print('IPython will make a temporary file named:',filename)
|
|
|
|
|
|
# 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] = shell.displayhook.prompt_count
|
|
|
if not opts_prev:
|
|
|
last_call[1] = args
|
|
|
except:
|
|
|
pass
|
|
|
|
|
|
|
|
|
return filename, lineno, use_temp
|
|
|
|
|
|
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
|
|
|
with open(filename) as mfile:
|
|
|
mvalue = mfile.read()
|
|
|
self.shell.user_ns[mname] = Macro(mvalue)
|
|
|
|
|
|
@skip_doctest
|
|
|
@line_magic
|
|
|
def edit(self, parameter_s='',last_call=['','']):
|
|
|
"""Bring up an editor and execute the resulting code.
|
|
|
|
|
|
Usage:
|
|
|
%edit [options] [args]
|
|
|
|
|
|
%edit runs IPython's editor hook. The default version of this hook is
|
|
|
set to call the editor specified by your $EDITOR environment variable.
|
|
|
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
|
|
|
``TerminalInteractiveShell.editor`` option in your configuration file.
|
|
|
This is useful if you wish to use a different editor from your typical
|
|
|
default with IPython (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:
|
|
|
|
|
|
-n <number>: open the editor at a specified line number. By default,
|
|
|
the IPython editor hook uses the unix syntax 'editor +N filename', but
|
|
|
you can configure this by providing your own modified hook if your
|
|
|
favorite editor supports line-number specifications with a different
|
|
|
syntax.
|
|
|
|
|
|
-p: this will call the editor with the same data as the previous time
|
|
|
it was used, regardless of how long ago (in your current session) it
|
|
|
was.
|
|
|
|
|
|
-r: use 'raw' input. This option only applies to input taken from the
|
|
|
user's history. By default, the 'processed' history is used, so that
|
|
|
magics are loaded in their transformed version to valid Python. If
|
|
|
this option is given, the raw input as typed as the command line is
|
|
|
used instead. When you exit the editor, it will be executed by
|
|
|
IPython's own processor.
|
|
|
|
|
|
-x: do not execute the edited code immediately upon exit. This is
|
|
|
mainly useful if you are editing programs which need to be called with
|
|
|
command line arguments, which you can then do using %run.
|
|
|
|
|
|
|
|
|
Arguments:
|
|
|
|
|
|
If arguments are given, the following possibilities exist:
|
|
|
|
|
|
- If the argument is a filename, IPython will load that into the
|
|
|
editor. It will execute its contents with execfile() when you exit,
|
|
|
loading any code in the file into your interactive namespace.
|
|
|
|
|
|
- The arguments are ranges of input history, e.g. "7 ~1/4-6".
|
|
|
The syntax is the same as in the %history magic.
|
|
|
|
|
|
- If the argument is a string variable, its contents are loaded
|
|
|
into the editor. You can thus edit any string which contains
|
|
|
python code (including the result of previous edits).
|
|
|
|
|
|
- If the argument is the name of an object (other than a string),
|
|
|
IPython will try to locate the file where it was defined and open the
|
|
|
editor at the point where it is defined. You can use `%edit function`
|
|
|
to load an editor exactly at the point where 'function' is defined,
|
|
|
edit it and have the file be executed automatically.
|
|
|
|
|
|
- If the object is a macro (see %macro for details), this opens up your
|
|
|
specified editor with a temporary file containing the macro's data.
|
|
|
Upon exit, the macro is reloaded with the contents of the file.
|
|
|
|
|
|
Note: opening at an exact line is only supported under Unix, and some
|
|
|
editors (like kedit and gedit up to Gnome 2.8) do not understand the
|
|
|
'+NUMBER' parameter necessary for this feature. Good editors like
|
|
|
(X)Emacs, vi, jed, pico and joe all do.
|
|
|
|
|
|
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]: edit
|
|
|
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]: edit 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 [5]: edit
|
|
|
Editing... done. Executing edited code...
|
|
|
hello
|
|
|
Out[5]: "print 'hello'\\n"
|
|
|
|
|
|
Now we call it again with the previous output (stored in _)::
|
|
|
|
|
|
In [6]: edit _
|
|
|
Editing... done. Executing edited code...
|
|
|
hello world
|
|
|
Out[6]: "print 'hello world'\\n"
|
|
|
|
|
|
Now we call it with the output #8 (stored in _8, also as Out[8])::
|
|
|
|
|
|
In [7]: edit _8
|
|
|
Editing... done. Executing edited code...
|
|
|
hello again
|
|
|
Out[7]: "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.core.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."""
|
|
|
opts,args = self.parse_options(parameter_s,'prxn:')
|
|
|
|
|
|
try:
|
|
|
filename, lineno, is_temp = self._find_edit_target(self.shell,
|
|
|
args, opts, last_call)
|
|
|
except MacroToEdit as e:
|
|
|
self._edit_macro(args, e.args[0])
|
|
|
return
|
|
|
except InteractivelyDefined as e:
|
|
|
print("Editing In[%i]" % e.index)
|
|
|
args = str(e.index)
|
|
|
filename, lineno, is_temp = self._find_edit_target(self.shell,
|
|
|
args, opts, last_call)
|
|
|
if filename is None:
|
|
|
# nothing was found, warnings have already been issued,
|
|
|
# just give up.
|
|
|
return
|
|
|
|
|
|
# do actual editing here
|
|
|
print('Editing...', end=' ')
|
|
|
sys.stdout.flush()
|
|
|
try:
|
|
|
# Quote filenames that may have spaces in them
|
|
|
if ' ' in filename:
|
|
|
filename = "'%s'" % filename
|
|
|
self.shell.hooks.editor(filename,lineno)
|
|
|
except TryNext:
|
|
|
warn('Could not open editor')
|
|
|
return
|
|
|
|
|
|
# XXX TODO: should this be generalized for all string vars?
|
|
|
# For now, this is special-cased to blocks created by cpaste
|
|
|
if args.strip() == 'pasted_block':
|
|
|
with open(filename, 'r') as f:
|
|
|
self.shell.user_ns['pasted_block'] = f.read()
|
|
|
|
|
|
if 'x' in opts: # -x prevents actual execution
|
|
|
print()
|
|
|
else:
|
|
|
print('done. Executing edited code...')
|
|
|
with preserve_keys(self.shell.user_ns, '__file__'):
|
|
|
if not is_temp:
|
|
|
self.shell.user_ns['__file__'] = filename
|
|
|
if 'r' in opts: # Untranslated IPython code
|
|
|
with open(filename, 'r') as f:
|
|
|
source = f.read()
|
|
|
self.shell.run_cell(source, store_history=False)
|
|
|
else:
|
|
|
self.shell.safe_execfile(filename, self.shell.user_ns,
|
|
|
self.shell.user_ns)
|
|
|
|
|
|
if is_temp:
|
|
|
try:
|
|
|
return open(filename).read()
|
|
|
except IOError as msg:
|
|
|
if msg.filename == filename:
|
|
|
warn('File not found. Did you forget to save?')
|
|
|
return
|
|
|
else:
|
|
|
self.shell.showtraceback()
|
|
|
|
