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# -*- coding: utf-8 -*-
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"""
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IPython -- An enhanced Interactive Python
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Requires Python 2.3 or newer.
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This file contains all the classes and helper functions specific to IPython.
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$Id: iplib.py 1335 2006-05-30 06:02:44Z fperez $
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"""
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#*****************************************************************************
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# Copyright (C) 2001 Janko Hauser <jhauser@zscout.de> and
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# Copyright (C) 2001-2006 Fernando Perez. <fperez@colorado.edu>
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#
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING, distributed as part of this software.
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#
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# Note: this code originally subclassed code.InteractiveConsole from the
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# Python standard library. Over time, all of that class has been copied
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# verbatim here for modifications which could not be accomplished by
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# subclassing. At this point, there are no dependencies at all on the code
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# module anymore (it is not even imported). The Python License (sec. 2)
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# allows for this, but it's always nice to acknowledge credit where credit is
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# due.
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#*****************************************************************************
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#****************************************************************************
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# Modules and globals
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from IPython import Release
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__author__ = '%s <%s>\n%s <%s>' % \
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( Release.authors['Janko'] + Release.authors['Fernando'] )
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__license__ = Release.license
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__version__ = Release.version
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# Python standard modules
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import __main__
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import __builtin__
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import StringIO
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import bdb
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import cPickle as pickle
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import codeop
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import exceptions
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import glob
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import inspect
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import keyword
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import new
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import os
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import pdb
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import pydoc
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import re
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import shutil
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import string
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import sys
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import tempfile
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import traceback
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import types
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import pickleshare
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from pprint import pprint, pformat
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# IPython's own modules
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import IPython
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from IPython import OInspect,PyColorize,ultraTB
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from IPython.ColorANSI import ColorScheme,ColorSchemeTable # too long names
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from IPython.FakeModule import FakeModule
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from IPython.Itpl import Itpl,itpl,printpl,ItplNS,itplns
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from IPython.Logger import Logger
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from IPython.Magic import Magic
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from IPython.Prompts import CachedOutput
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from IPython.ipstruct import Struct
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from IPython.background_jobs import BackgroundJobManager
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from IPython.usage import cmd_line_usage,interactive_usage
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from IPython.genutils import *
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import IPython.ipapi
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# Globals
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# store the builtin raw_input globally, and use this always, in case user code
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# overwrites it (like wx.py.PyShell does)
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raw_input_original = raw_input
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# compiled regexps for autoindent management
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dedent_re = re.compile(r'^\s+raise|^\s+return|^\s+pass')
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#****************************************************************************
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# Some utility function definitions
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ini_spaces_re = re.compile(r'^(\s+)')
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def num_ini_spaces(strng):
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"""Return the number of initial spaces in a string"""
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ini_spaces = ini_spaces_re.match(strng)
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if ini_spaces:
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return ini_spaces.end()
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else:
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return 0
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def softspace(file, newvalue):
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"""Copied from code.py, to remove the dependency"""
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oldvalue = 0
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try:
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oldvalue = file.softspace
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except AttributeError:
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pass
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try:
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file.softspace = newvalue
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except (AttributeError, TypeError):
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# "attribute-less object" or "read-only attributes"
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pass
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return oldvalue
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#****************************************************************************
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# Local use exceptions
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class SpaceInInput(exceptions.Exception): pass
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#****************************************************************************
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# Local use classes
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class Bunch: pass
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class Undefined: pass
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class InputList(list):
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"""Class to store user input.
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It's basically a list, but slices return a string instead of a list, thus
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allowing things like (assuming 'In' is an instance):
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exec In[4:7]
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or
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exec In[5:9] + In[14] + In[21:25]"""
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def __getslice__(self,i,j):
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return ''.join(list.__getslice__(self,i,j))
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class SyntaxTB(ultraTB.ListTB):
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"""Extension which holds some state: the last exception value"""
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def __init__(self,color_scheme = 'NoColor'):
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ultraTB.ListTB.__init__(self,color_scheme)
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self.last_syntax_error = None
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def __call__(self, etype, value, elist):
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self.last_syntax_error = value
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ultraTB.ListTB.__call__(self,etype,value,elist)
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def clear_err_state(self):
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"""Return the current error state and clear it"""
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e = self.last_syntax_error
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self.last_syntax_error = None
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return e
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#****************************************************************************
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# Main IPython class
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# FIXME: the Magic class is a mixin for now, and will unfortunately remain so
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# until a full rewrite is made. I've cleaned all cross-class uses of
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# attributes and methods, but too much user code out there relies on the
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# equlity %foo == __IP.magic_foo, so I can't actually remove the mixin usage.
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#
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# But at least now, all the pieces have been separated and we could, in
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# principle, stop using the mixin. This will ease the transition to the
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# chainsaw branch.
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# For reference, the following is the list of 'self.foo' uses in the Magic
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# class as of 2005-12-28. These are names we CAN'T use in the main ipython
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# class, to prevent clashes.
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# ['self.__class__', 'self.__dict__', 'self._inspect', 'self._ofind',
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# 'self.arg_err', 'self.extract_input', 'self.format_', 'self.lsmagic',
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# 'self.magic_', 'self.options_table', 'self.parse', 'self.shell',
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# 'self.value']
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class InteractiveShell(object,Magic):
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"""An enhanced console for Python."""
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# class attribute to indicate whether the class supports threads or not.
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# Subclasses with thread support should override this as needed.
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isthreaded = False
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def __init__(self,name,usage=None,rc=Struct(opts=None,args=None),
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user_ns = None,user_global_ns=None,banner2='',
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custom_exceptions=((),None),embedded=False):
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# log system
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self.logger = Logger(self,logfname='ipython_log.py',logmode='rotate')
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# some minimal strict typechecks. For some core data structures, I
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# want actual basic python types, not just anything that looks like
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# one. This is especially true for namespaces.
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for ns in (user_ns,user_global_ns):
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if ns is not None and type(ns) != types.DictType:
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raise TypeError,'namespace must be a dictionary'
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# Job manager (for jobs run as background threads)
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self.jobs = BackgroundJobManager()
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# Store the actual shell's name
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self.name = name
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# We need to know whether the instance is meant for embedding, since
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# global/local namespaces need to be handled differently in that case
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self.embedded = embedded
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# command compiler
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self.compile = codeop.CommandCompiler()
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# User input buffer
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self.buffer = []
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# Default name given in compilation of code
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self.filename = '<ipython console>'
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# Make an empty namespace, which extension writers can rely on both
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# existing and NEVER being used by ipython itself. This gives them a
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# convenient location for storing additional information and state
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# their extensions may require, without fear of collisions with other
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# ipython names that may develop later.
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self.meta = Struct()
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# Create the namespace where the user will operate. user_ns is
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# normally the only one used, and it is passed to the exec calls as
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# the locals argument. But we do carry a user_global_ns namespace
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# given as the exec 'globals' argument, This is useful in embedding
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# situations where the ipython shell opens in a context where the
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# distinction between locals and globals is meaningful.
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# FIXME. For some strange reason, __builtins__ is showing up at user
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# level as a dict instead of a module. This is a manual fix, but I
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# should really track down where the problem is coming from. Alex
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# Schmolck reported this problem first.
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# A useful post by Alex Martelli on this topic:
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# Re: inconsistent value from __builtins__
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# Von: Alex Martelli <aleaxit@yahoo.com>
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# Datum: Freitag 01 Oktober 2004 04:45:34 nachmittags/abends
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# Gruppen: comp.lang.python
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# Michael Hohn <hohn@hooknose.lbl.gov> wrote:
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# > >>> print type(builtin_check.get_global_binding('__builtins__'))
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# > <type 'dict'>
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# > >>> print type(__builtins__)
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# > <type 'module'>
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# > Is this difference in return value intentional?
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# Well, it's documented that '__builtins__' can be either a dictionary
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# or a module, and it's been that way for a long time. Whether it's
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# intentional (or sensible), I don't know. In any case, the idea is
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# that if you need to access the built-in namespace directly, you
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# should start with "import __builtin__" (note, no 's') which will
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# definitely give you a module. Yeah, it's somewhat confusing:-(.
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# These routines return properly built dicts as needed by the rest of
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# the code, and can also be used by extension writers to generate
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# properly initialized namespaces.
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user_ns = IPython.ipapi.make_user_ns(user_ns)
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user_global_ns = IPython.ipapi.make_user_global_ns(user_global_ns)
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# Assign namespaces
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# This is the namespace where all normal user variables live
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self.user_ns = user_ns
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# Embedded instances require a separate namespace for globals.
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# Normally this one is unused by non-embedded instances.
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self.user_global_ns = user_global_ns
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# A namespace to keep track of internal data structures to prevent
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# them from cluttering user-visible stuff. Will be updated later
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self.internal_ns = {}
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# Namespace of system aliases. Each entry in the alias
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# table must be a 2-tuple of the form (N,name), where N is the number
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# of positional arguments of the alias.
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self.alias_table = {}
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# A table holding all the namespaces IPython deals with, so that
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# introspection facilities can search easily.
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self.ns_table = {'user':user_ns,
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'user_global':user_global_ns,
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'alias':self.alias_table,
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'internal':self.internal_ns,
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'builtin':__builtin__.__dict__
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}
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# The user namespace MUST have a pointer to the shell itself.
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self.user_ns[name] = self
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# We need to insert into sys.modules something that looks like a
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# module but which accesses the IPython namespace, for shelve and
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# pickle to work interactively. Normally they rely on getting
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# everything out of __main__, but for embedding purposes each IPython
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# instance has its own private namespace, so we can't go shoving
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# everything into __main__.
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# note, however, that we should only do this for non-embedded
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# ipythons, which really mimic the __main__.__dict__ with their own
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# namespace. Embedded instances, on the other hand, should not do
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# this because they need to manage the user local/global namespaces
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# only, but they live within a 'normal' __main__ (meaning, they
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# shouldn't overtake the execution environment of the script they're
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# embedded in).
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if not embedded:
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try:
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main_name = self.user_ns['__name__']
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except KeyError:
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raise KeyError,'user_ns dictionary MUST have a "__name__" key'
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else:
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#print "pickle hack in place" # dbg
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#print 'main_name:',main_name # dbg
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sys.modules[main_name] = FakeModule(self.user_ns)
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# List of input with multi-line handling.
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# Fill its zero entry, user counter starts at 1
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self.input_hist = InputList(['\n'])
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# This one will hold the 'raw' input history, without any
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# pre-processing. This will allow users to retrieve the input just as
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# it was exactly typed in by the user, with %hist -r.
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self.input_hist_raw = InputList(['\n'])
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# list of visited directories
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try:
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self.dir_hist = [os.getcwd()]
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except IOError, e:
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self.dir_hist = []
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# dict of output history
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self.output_hist = {}
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# dict of things NOT to alias (keywords, builtins and some magics)
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no_alias = {}
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no_alias_magics = ['cd','popd','pushd','dhist','alias','unalias']
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for key in keyword.kwlist + no_alias_magics:
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no_alias[key] = 1
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no_alias.update(__builtin__.__dict__)
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self.no_alias = no_alias
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# make global variables for user access to these
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self.user_ns['_ih'] = self.input_hist
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self.user_ns['_oh'] = self.output_hist
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self.user_ns['_dh'] = self.dir_hist
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# user aliases to input and output histories
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self.user_ns['In'] = self.input_hist
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self.user_ns['Out'] = self.output_hist
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# Object variable to store code object waiting execution. This is
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# used mainly by the multithreaded shells, but it can come in handy in
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# other situations. No need to use a Queue here, since it's a single
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# item which gets cleared once run.
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self.code_to_run = None
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# escapes for automatic behavior on the command line
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self.ESC_SHELL = '!'
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self.ESC_HELP = '?'
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self.ESC_MAGIC = '%'
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self.ESC_QUOTE = ','
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self.ESC_QUOTE2 = ';'
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self.ESC_PAREN = '/'
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# And their associated handlers
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self.esc_handlers = {self.ESC_PAREN : self.handle_auto,
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self.ESC_QUOTE : self.handle_auto,
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self.ESC_QUOTE2 : self.handle_auto,
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self.ESC_MAGIC : self.handle_magic,
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self.ESC_HELP : self.handle_help,
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self.ESC_SHELL : self.handle_shell_escape,
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}
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# class initializations
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Magic.__init__(self,self)
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# Python source parser/formatter for syntax highlighting
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pyformat = PyColorize.Parser().format
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self.pycolorize = lambda src: pyformat(src,'str',self.rc['colors'])
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# hooks holds pointers used for user-side customizations
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self.hooks = Struct()
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# Set all default hooks, defined in the IPython.hooks module.
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hooks = IPython.hooks
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|
for hook_name in hooks.__all__:
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# default hooks have priority 100, i.e. low; user hooks should have 0-100 priority
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self.set_hook(hook_name,getattr(hooks,hook_name), 100)
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#print "bound hook",hook_name
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# Flag to mark unconditional exit
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self.exit_now = False
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self.usage_min = """\
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An enhanced console for Python.
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Some of its features are:
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- Readline support if the readline library is present.
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- Tab completion in the local namespace.
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- Logging of input, see command-line options.
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- System shell escape via ! , eg !ls.
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- Magic commands, starting with a % (like %ls, %pwd, %cd, etc.)
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- Keeps track of locally defined variables via %who, %whos.
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- Show object information with a ? eg ?x or x? (use ?? for more info).
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"""
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|
if usage: self.usage = usage
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|
else: self.usage = self.usage_min
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# Storage
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|
|
self.rc = rc # This will hold all configuration information
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|
self.pager = 'less'
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|
# temporary files used for various purposes. Deleted at exit.
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|
|
self.tempfiles = []
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|
# Keep track of readline usage (later set by init_readline)
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|
|
self.has_readline = False
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|
# template for logfile headers. It gets resolved at runtime by the
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|
|
# logstart method.
|
|
|
self.loghead_tpl = \
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|
|
"""#log# Automatic Logger file. *** THIS MUST BE THE FIRST LINE ***
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|
|
#log# DO NOT CHANGE THIS LINE OR THE TWO BELOW
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|
|
#log# opts = %s
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|
|
#log# args = %s
|
|
|
#log# It is safe to make manual edits below here.
|
|
|
#log#-----------------------------------------------------------------------
|
|
|
"""
|
|
|
# for pushd/popd management
|
|
|
try:
|
|
|
self.home_dir = get_home_dir()
|
|
|
except HomeDirError,msg:
|
|
|
fatal(msg)
|
|
|
|
|
|
self.dir_stack = [os.getcwd().replace(self.home_dir,'~')]
|
|
|
|
|
|
# Functions to call the underlying shell.
|
|
|
|
|
|
# utility to expand user variables via Itpl
|
|
|
self.var_expand = lambda cmd: str(ItplNS(cmd.replace('#','\#'),
|
|
|
self.user_ns))
|
|
|
# The first is similar to os.system, but it doesn't return a value,
|
|
|
# and it allows interpolation of variables in the user's namespace.
|
|
|
self.system = lambda cmd: shell(self.var_expand(cmd),
|
|
|
header='IPython system call: ',
|
|
|
verbose=self.rc.system_verbose)
|
|
|
# These are for getoutput and getoutputerror:
|
|
|
self.getoutput = lambda cmd: \
|
|
|
getoutput(self.var_expand(cmd),
|
|
|
header='IPython system call: ',
|
|
|
verbose=self.rc.system_verbose)
|
|
|
self.getoutputerror = lambda cmd: \
|
|
|
getoutputerror(str(ItplNS(cmd.replace('#','\#'),
|
|
|
self.user_ns)),
|
|
|
header='IPython system call: ',
|
|
|
verbose=self.rc.system_verbose)
|
|
|
|
|
|
# RegExp for splitting line contents into pre-char//first
|
|
|
# word-method//rest. For clarity, each group in on one line.
|
|
|
|
|
|
# WARNING: update the regexp if the above escapes are changed, as they
|
|
|
# are hardwired in.
|
|
|
|
|
|
# Don't get carried away with trying to make the autocalling catch too
|
|
|
# much: it's better to be conservative rather than to trigger hidden
|
|
|
# evals() somewhere and end up causing side effects.
|
|
|
|
|
|
self.line_split = re.compile(r'^([\s*,;/])'
|
|
|
r'([\?\w\.]+\w*\s*)'
|
|
|
r'(\(?.*$)')
|
|
|
|
|
|
# Original re, keep around for a while in case changes break something
|
|
|
#self.line_split = re.compile(r'(^[\s*!\?%,/]?)'
|
|
|
# r'(\s*[\?\w\.]+\w*\s*)'
|
|
|
# r'(\(?.*$)')
|
|
|
|
|
|
# RegExp to identify potential function names
|
|
|
self.re_fun_name = re.compile(r'[a-zA-Z_]([a-zA-Z0-9_.]*) *$')
|
|
|
|
|
|
# RegExp to exclude strings with this start from autocalling. In
|
|
|
# particular, all binary operators should be excluded, so that if foo
|
|
|
# is callable, foo OP bar doesn't become foo(OP bar), which is
|
|
|
# invalid. The characters '!=()' don't need to be checked for, as the
|
|
|
# _prefilter routine explicitely does so, to catch direct calls and
|
|
|
# rebindings of existing names.
|
|
|
|
|
|
# Warning: the '-' HAS TO BE AT THE END of the first group, otherwise
|
|
|
# it affects the rest of the group in square brackets.
|
|
|
self.re_exclude_auto = re.compile(r'^[<>,&^\|\*/\+-]'
|
|
|
'|^is |^not |^in |^and |^or ')
|
|
|
|
|
|
# try to catch also methods for stuff in lists/tuples/dicts: off
|
|
|
# (experimental). For this to work, the line_split regexp would need
|
|
|
# to be modified so it wouldn't break things at '['. That line is
|
|
|
# nasty enough that I shouldn't change it until I can test it _well_.
|
|
|
#self.re_fun_name = re.compile (r'[a-zA-Z_]([a-zA-Z0-9_.\[\]]*) ?$')
|
|
|
|
|
|
# keep track of where we started running (mainly for crash post-mortem)
|
|
|
self.starting_dir = os.getcwd()
|
|
|
|
|
|
# Various switches which can be set
|
|
|
self.CACHELENGTH = 5000 # this is cheap, it's just text
|
|
|
self.BANNER = "Python %(version)s on %(platform)s\n" % sys.__dict__
|
|
|
self.banner2 = banner2
|
|
|
|
|
|
# TraceBack handlers:
|
|
|
|
|
|
# Syntax error handler.
|
|
|
self.SyntaxTB = SyntaxTB(color_scheme='NoColor')
|
|
|
|
|
|
# The interactive one is initialized with an offset, meaning we always
|
|
|
# want to remove the topmost item in the traceback, which is our own
|
|
|
# internal code. Valid modes: ['Plain','Context','Verbose']
|
|
|
self.InteractiveTB = ultraTB.AutoFormattedTB(mode = 'Plain',
|
|
|
color_scheme='NoColor',
|
|
|
tb_offset = 1)
|
|
|
|
|
|
# IPython itself shouldn't crash. This will produce a detailed
|
|
|
# post-mortem if it does. But we only install the crash handler for
|
|
|
# non-threaded shells, the threaded ones use a normal verbose reporter
|
|
|
# and lose the crash handler. This is because exceptions in the main
|
|
|
# thread (such as in GUI code) propagate directly to sys.excepthook,
|
|
|
# and there's no point in printing crash dumps for every user exception.
|
|
|
if self.isthreaded:
|
|
|
sys.excepthook = ultraTB.FormattedTB()
|
|
|
else:
|
|
|
from IPython import CrashHandler
|
|
|
sys.excepthook = CrashHandler.CrashHandler(self)
|
|
|
|
|
|
# The instance will store a pointer to this, so that runtime code
|
|
|
# (such as magics) can access it. This is because during the
|
|
|
# read-eval loop, it gets temporarily overwritten (to deal with GUI
|
|
|
# frameworks).
|
|
|
self.sys_excepthook = sys.excepthook
|
|
|
|
|
|
# and add any custom exception handlers the user may have specified
|
|
|
self.set_custom_exc(*custom_exceptions)
|
|
|
|
|
|
# indentation management
|
|
|
self.autoindent = False
|
|
|
self.indent_current_nsp = 0
|
|
|
|
|
|
# Make some aliases automatically
|
|
|
# Prepare list of shell aliases to auto-define
|
|
|
if os.name == 'posix':
|
|
|
auto_alias = ('mkdir mkdir', 'rmdir rmdir',
|
|
|
'mv mv -i','rm rm -i','cp cp -i',
|
|
|
'cat cat','less less','clear clear',
|
|
|
# a better ls
|
|
|
'ls ls -F',
|
|
|
# long ls
|
|
|
'll ls -lF')
|
|
|
# Extra ls aliases with color, which need special treatment on BSD
|
|
|
# variants
|
|
|
ls_extra = ( # color ls
|
|
|
'lc ls -F -o --color',
|
|
|
# ls normal files only
|
|
|
'lf ls -F -o --color %l | grep ^-',
|
|
|
# ls symbolic links
|
|
|
'lk ls -F -o --color %l | grep ^l',
|
|
|
# directories or links to directories,
|
|
|
'ldir ls -F -o --color %l | grep /$',
|
|
|
# things which are executable
|
|
|
'lx ls -F -o --color %l | grep ^-..x',
|
|
|
)
|
|
|
# The BSDs don't ship GNU ls, so they don't understand the
|
|
|
# --color switch out of the box
|
|
|
if 'bsd' in sys.platform:
|
|
|
ls_extra = ( # ls normal files only
|
|
|
'lf ls -F -o %l | grep ^-',
|
|
|
# ls symbolic links
|
|
|
'lk ls -F -o %l | grep ^l',
|
|
|
# directories or links to directories,
|
|
|
'ldir ls -F -o %l | grep /$',
|
|
|
# things which are executable
|
|
|
'lx ls -F -o %l | grep ^-..x',
|
|
|
)
|
|
|
auto_alias = auto_alias + ls_extra
|
|
|
elif os.name in ['nt','dos']:
|
|
|
auto_alias = ('dir dir /on', 'ls dir /on',
|
|
|
'ddir dir /ad /on', 'ldir dir /ad /on',
|
|
|
'mkdir mkdir','rmdir rmdir','echo echo',
|
|
|
'ren ren','cls cls','copy copy')
|
|
|
else:
|
|
|
auto_alias = ()
|
|
|
self.auto_alias = [s.split(None,1) for s in auto_alias]
|
|
|
# Call the actual (public) initializer
|
|
|
self.init_auto_alias()
|
|
|
|
|
|
# Produce a public API instance
|
|
|
self.api = IPython.ipapi.IPApi(self)
|
|
|
|
|
|
# track which builtins we add, so we can clean up later
|
|
|
self.builtins_added = {}
|
|
|
# This method will add the necessary builtins for operation, but
|
|
|
# tracking what it did via the builtins_added dict.
|
|
|
self.add_builtins()
|
|
|
|
|
|
# end __init__
|
|
|
|
|
|
def pre_config_initialization(self):
|
|
|
"""Pre-configuration init method
|
|
|
|
|
|
This is called before the configuration files are processed to
|
|
|
prepare the services the config files might need.
|
|
|
|
|
|
self.rc already has reasonable default values at this point.
|
|
|
"""
|
|
|
rc = self.rc
|
|
|
|
|
|
self.db = pickleshare.PickleShareDB(rc.ipythondir + "/db")
|
|
|
|
|
|
def post_config_initialization(self):
|
|
|
"""Post configuration init method
|
|
|
|
|
|
This is called after the configuration files have been processed to
|
|
|
'finalize' the initialization."""
|
|
|
|
|
|
rc = self.rc
|
|
|
|
|
|
# Object inspector
|
|
|
self.inspector = OInspect.Inspector(OInspect.InspectColors,
|
|
|
PyColorize.ANSICodeColors,
|
|
|
'NoColor',
|
|
|
rc.object_info_string_level)
|
|
|
|
|
|
# Load readline proper
|
|
|
if rc.readline:
|
|
|
self.init_readline()
|
|
|
|
|
|
# local shortcut, this is used a LOT
|
|
|
self.log = self.logger.log
|
|
|
|
|
|
# Initialize cache, set in/out prompts and printing system
|
|
|
self.outputcache = CachedOutput(self,
|
|
|
rc.cache_size,
|
|
|
rc.pprint,
|
|
|
input_sep = rc.separate_in,
|
|
|
output_sep = rc.separate_out,
|
|
|
output_sep2 = rc.separate_out2,
|
|
|
ps1 = rc.prompt_in1,
|
|
|
ps2 = rc.prompt_in2,
|
|
|
ps_out = rc.prompt_out,
|
|
|
pad_left = rc.prompts_pad_left)
|
|
|
|
|
|
# user may have over-ridden the default print hook:
|
|
|
try:
|
|
|
self.outputcache.__class__.display = self.hooks.display
|
|
|
except AttributeError:
|
|
|
pass
|
|
|
|
|
|
# I don't like assigning globally to sys, because it means when embedding
|
|
|
# instances, each embedded instance overrides the previous choice. But
|
|
|
# sys.displayhook seems to be called internally by exec, so I don't see a
|
|
|
# way around it.
|
|
|
sys.displayhook = self.outputcache
|
|
|
|
|
|
# Set user colors (don't do it in the constructor above so that it
|
|
|
# doesn't crash if colors option is invalid)
|
|
|
self.magic_colors(rc.colors)
|
|
|
|
|
|
# Set calling of pdb on exceptions
|
|
|
self.call_pdb = rc.pdb
|
|
|
|
|
|
# Load user aliases
|
|
|
for alias in rc.alias:
|
|
|
self.magic_alias(alias)
|
|
|
self.hooks.late_startup_hook()
|
|
|
|
|
|
for batchfile in [path(arg) for arg in self.rc.args
|
|
|
if arg.lower().endswith('.ipy')]:
|
|
|
if not batchfile.isfile():
|
|
|
print "No such batch file:", batchfile
|
|
|
continue
|
|
|
self.api.runlines(batchfile.text())
|
|
|
|
|
|
def add_builtins(self):
|
|
|
"""Store ipython references into the builtin namespace.
|
|
|
|
|
|
Some parts of ipython operate via builtins injected here, which hold a
|
|
|
reference to IPython itself."""
|
|
|
|
|
|
# TODO: deprecate all except _ip; 'jobs' should be installed
|
|
|
# by an extension and the rest are under _ip, ipalias is redundant
|
|
|
builtins_new = dict(__IPYTHON__ = self,
|
|
|
ip_set_hook = self.set_hook,
|
|
|
jobs = self.jobs,
|
|
|
ipmagic = self.ipmagic,
|
|
|
ipalias = self.ipalias,
|
|
|
ipsystem = self.ipsystem,
|
|
|
_ip = self.api
|
|
|
)
|
|
|
for biname,bival in builtins_new.items():
|
|
|
try:
|
|
|
# store the orignal value so we can restore it
|
|
|
self.builtins_added[biname] = __builtin__.__dict__[biname]
|
|
|
except KeyError:
|
|
|
# or mark that it wasn't defined, and we'll just delete it at
|
|
|
# cleanup
|
|
|
self.builtins_added[biname] = Undefined
|
|
|
__builtin__.__dict__[biname] = bival
|
|
|
|
|
|
# Keep in the builtins a flag for when IPython is active. We set it
|
|
|
# with setdefault so that multiple nested IPythons don't clobber one
|
|
|
# another. Each will increase its value by one upon being activated,
|
|
|
# which also gives us a way to determine the nesting level.
|
|
|
__builtin__.__dict__.setdefault('__IPYTHON__active',0)
|
|
|
|
|
|
def clean_builtins(self):
|
|
|
"""Remove any builtins which might have been added by add_builtins, or
|
|
|
restore overwritten ones to their previous values."""
|
|
|
for biname,bival in self.builtins_added.items():
|
|
|
if bival is Undefined:
|
|
|
del __builtin__.__dict__[biname]
|
|
|
else:
|
|
|
__builtin__.__dict__[biname] = bival
|
|
|
self.builtins_added.clear()
|
|
|
|
|
|
def set_hook(self,name,hook, priority = 50):
|
|
|
"""set_hook(name,hook) -> sets an internal IPython hook.
|
|
|
|
|
|
IPython exposes some of its internal API as user-modifiable hooks. By
|
|
|
adding your function to one of these hooks, you can modify IPython's
|
|
|
behavior to call at runtime your own routines."""
|
|
|
|
|
|
# At some point in the future, this should validate the hook before it
|
|
|
# accepts it. Probably at least check that the hook takes the number
|
|
|
# of args it's supposed to.
|
|
|
dp = getattr(self.hooks, name, None)
|
|
|
if name not in IPython.hooks.__all__:
|
|
|
print "Warning! Hook '%s' is not one of %s" % (name, IPython.hooks.__all__ )
|
|
|
if not dp:
|
|
|
dp = IPython.hooks.CommandChainDispatcher()
|
|
|
|
|
|
f = new.instancemethod(hook,self,self.__class__)
|
|
|
try:
|
|
|
dp.add(f,priority)
|
|
|
except AttributeError:
|
|
|
# it was not commandchain, plain old func - replace
|
|
|
dp = f
|
|
|
|
|
|
setattr(self.hooks,name, dp)
|
|
|
|
|
|
|
|
|
#setattr(self.hooks,name,new.instancemethod(hook,self,self.__class__))
|
|
|
|
|
|
def set_custom_exc(self,exc_tuple,handler):
|
|
|
"""set_custom_exc(exc_tuple,handler)
|
|
|
|
|
|
Set a custom exception handler, which will be called if any of the
|
|
|
exceptions in exc_tuple occur in the mainloop (specifically, in the
|
|
|
runcode() method.
|
|
|
|
|
|
Inputs:
|
|
|
|
|
|
- exc_tuple: a *tuple* of valid exceptions to call the defined
|
|
|
handler for. It is very important that you use a tuple, and NOT A
|
|
|
LIST here, because of the way Python's except statement works. If
|
|
|
you only want to trap a single exception, use a singleton tuple:
|
|
|
|
|
|
exc_tuple == (MyCustomException,)
|
|
|
|
|
|
- handler: this must be defined as a function with the following
|
|
|
basic interface: def my_handler(self,etype,value,tb).
|
|
|
|
|
|
This will be made into an instance method (via new.instancemethod)
|
|
|
of IPython itself, and it will be called if any of the exceptions
|
|
|
listed in the exc_tuple are caught. If the handler is None, an
|
|
|
internal basic one is used, which just prints basic info.
|
|
|
|
|
|
WARNING: by putting in your own exception handler into IPython's main
|
|
|
execution loop, you run a very good chance of nasty crashes. This
|
|
|
facility should only be used if you really know what you are doing."""
|
|
|
|
|
|
assert type(exc_tuple)==type(()) , \
|
|
|
"The custom exceptions must be given AS A TUPLE."
|
|
|
|
|
|
def dummy_handler(self,etype,value,tb):
|
|
|
print '*** Simple custom exception handler ***'
|
|
|
print 'Exception type :',etype
|
|
|
print 'Exception value:',value
|
|
|
print 'Traceback :',tb
|
|
|
print 'Source code :','\n'.join(self.buffer)
|
|
|
|
|
|
if handler is None: handler = dummy_handler
|
|
|
|
|
|
self.CustomTB = new.instancemethod(handler,self,self.__class__)
|
|
|
self.custom_exceptions = exc_tuple
|
|
|
|
|
|
def set_custom_completer(self,completer,pos=0):
|
|
|
"""set_custom_completer(completer,pos=0)
|
|
|
|
|
|
Adds a new custom completer function.
|
|
|
|
|
|
The position argument (defaults to 0) is the index in the completers
|
|
|
list where you want the completer to be inserted."""
|
|
|
|
|
|
newcomp = new.instancemethod(completer,self.Completer,
|
|
|
self.Completer.__class__)
|
|
|
self.Completer.matchers.insert(pos,newcomp)
|
|
|
|
|
|
def _get_call_pdb(self):
|
|
|
return self._call_pdb
|
|
|
|
|
|
def _set_call_pdb(self,val):
|
|
|
|
|
|
if val not in (0,1,False,True):
|
|
|
raise ValueError,'new call_pdb value must be boolean'
|
|
|
|
|
|
# store value in instance
|
|
|
self._call_pdb = val
|
|
|
|
|
|
# notify the actual exception handlers
|
|
|
self.InteractiveTB.call_pdb = val
|
|
|
if self.isthreaded:
|
|
|
try:
|
|
|
self.sys_excepthook.call_pdb = val
|
|
|
except:
|
|
|
warn('Failed to activate pdb for threaded exception handler')
|
|
|
|
|
|
call_pdb = property(_get_call_pdb,_set_call_pdb,None,
|
|
|
'Control auto-activation of pdb at exceptions')
|
|
|
|
|
|
|
|
|
# These special functions get installed in the builtin namespace, to
|
|
|
# provide programmatic (pure python) access to magics, aliases and system
|
|
|
# calls. This is important for logging, user scripting, and more.
|
|
|
|
|
|
# We are basically exposing, via normal python functions, the three
|
|
|
# mechanisms in which ipython offers special call modes (magics for
|
|
|
# internal control, aliases for direct system access via pre-selected
|
|
|
# names, and !cmd for calling arbitrary system commands).
|
|
|
|
|
|
def ipmagic(self,arg_s):
|
|
|
"""Call a magic function by name.
|
|
|
|
|
|
Input: a string containing the name of the magic function to call and any
|
|
|
additional arguments to be passed to the magic.
|
|
|
|
|
|
ipmagic('name -opt foo bar') is equivalent to typing at the ipython
|
|
|
prompt:
|
|
|
|
|
|
In[1]: %name -opt foo bar
|
|
|
|
|
|
To call a magic without arguments, simply use ipmagic('name').
|
|
|
|
|
|
This provides a proper Python function to call IPython's magics in any
|
|
|
valid Python code you can type at the interpreter, including loops and
|
|
|
compound statements. It is added by IPython to the Python builtin
|
|
|
namespace upon initialization."""
|
|
|
|
|
|
args = arg_s.split(' ',1)
|
|
|
magic_name = args[0]
|
|
|
magic_name = magic_name.lstrip(self.ESC_MAGIC)
|
|
|
|
|
|
try:
|
|
|
magic_args = args[1]
|
|
|
except IndexError:
|
|
|
magic_args = ''
|
|
|
fn = getattr(self,'magic_'+magic_name,None)
|
|
|
if fn is None:
|
|
|
error("Magic function `%s` not found." % magic_name)
|
|
|
else:
|
|
|
magic_args = self.var_expand(magic_args)
|
|
|
return fn(magic_args)
|
|
|
|
|
|
def ipalias(self,arg_s):
|
|
|
"""Call an alias by name.
|
|
|
|
|
|
Input: a string containing the name of the alias to call and any
|
|
|
additional arguments to be passed to the magic.
|
|
|
|
|
|
ipalias('name -opt foo bar') is equivalent to typing at the ipython
|
|
|
prompt:
|
|
|
|
|
|
In[1]: name -opt foo bar
|
|
|
|
|
|
To call an alias without arguments, simply use ipalias('name').
|
|
|
|
|
|
This provides a proper Python function to call IPython's aliases in any
|
|
|
valid Python code you can type at the interpreter, including loops and
|
|
|
compound statements. It is added by IPython to the Python builtin
|
|
|
namespace upon initialization."""
|
|
|
|
|
|
args = arg_s.split(' ',1)
|
|
|
alias_name = args[0]
|
|
|
try:
|
|
|
alias_args = args[1]
|
|
|
except IndexError:
|
|
|
alias_args = ''
|
|
|
if alias_name in self.alias_table:
|
|
|
self.call_alias(alias_name,alias_args)
|
|
|
else:
|
|
|
error("Alias `%s` not found." % alias_name)
|
|
|
|
|
|
def ipsystem(self,arg_s):
|
|
|
"""Make a system call, using IPython."""
|
|
|
|
|
|
self.system(arg_s)
|
|
|
|
|
|
def complete(self,text):
|
|
|
"""Return a sorted list of all possible completions on text.
|
|
|
|
|
|
Inputs:
|
|
|
|
|
|
- text: a string of text to be completed on.
|
|
|
|
|
|
This is a wrapper around the completion mechanism, similar to what
|
|
|
readline does at the command line when the TAB key is hit. By
|
|
|
exposing it as a method, it can be used by other non-readline
|
|
|
environments (such as GUIs) for text completion.
|
|
|
|
|
|
Simple usage example:
|
|
|
|
|
|
In [1]: x = 'hello'
|
|
|
|
|
|
In [2]: __IP.complete('x.l')
|
|
|
Out[2]: ['x.ljust', 'x.lower', 'x.lstrip']"""
|
|
|
|
|
|
complete = self.Completer.complete
|
|
|
state = 0
|
|
|
# use a dict so we get unique keys, since ipyhton's multiple
|
|
|
# completers can return duplicates.
|
|
|
comps = {}
|
|
|
while True:
|
|
|
newcomp = complete(text,state)
|
|
|
if newcomp is None:
|
|
|
break
|
|
|
comps[newcomp] = 1
|
|
|
state += 1
|
|
|
outcomps = comps.keys()
|
|
|
outcomps.sort()
|
|
|
return outcomps
|
|
|
|
|
|
def set_completer_frame(self, frame=None):
|
|
|
if frame:
|
|
|
self.Completer.namespace = frame.f_locals
|
|
|
self.Completer.global_namespace = frame.f_globals
|
|
|
else:
|
|
|
self.Completer.namespace = self.user_ns
|
|
|
self.Completer.global_namespace = self.user_global_ns
|
|
|
|
|
|
def init_auto_alias(self):
|
|
|
"""Define some aliases automatically.
|
|
|
|
|
|
These are ALL parameter-less aliases"""
|
|
|
|
|
|
for alias,cmd in self.auto_alias:
|
|
|
self.alias_table[alias] = (0,cmd)
|
|
|
|
|
|
def alias_table_validate(self,verbose=0):
|
|
|
"""Update information about the alias table.
|
|
|
|
|
|
In particular, make sure no Python keywords/builtins are in it."""
|
|
|
|
|
|
no_alias = self.no_alias
|
|
|
for k in self.alias_table.keys():
|
|
|
if k in no_alias:
|
|
|
del self.alias_table[k]
|
|
|
if verbose:
|
|
|
print ("Deleting alias <%s>, it's a Python "
|
|
|
"keyword or builtin." % k)
|
|
|
|
|
|
def set_autoindent(self,value=None):
|
|
|
"""Set the autoindent flag, checking for readline support.
|
|
|
|
|
|
If called with no arguments, it acts as a toggle."""
|
|
|
|
|
|
if not self.has_readline:
|
|
|
if os.name == 'posix':
|
|
|
warn("The auto-indent feature requires the readline library")
|
|
|
self.autoindent = 0
|
|
|
return
|
|
|
if value is None:
|
|
|
self.autoindent = not self.autoindent
|
|
|
else:
|
|
|
self.autoindent = value
|
|
|
|
|
|
def rc_set_toggle(self,rc_field,value=None):
|
|
|
"""Set or toggle a field in IPython's rc config. structure.
|
|
|
|
|
|
If called with no arguments, it acts as a toggle.
|
|
|
|
|
|
If called with a non-existent field, the resulting AttributeError
|
|
|
exception will propagate out."""
|
|
|
|
|
|
rc_val = getattr(self.rc,rc_field)
|
|
|
if value is None:
|
|
|
value = not rc_val
|
|
|
setattr(self.rc,rc_field,value)
|
|
|
|
|
|
def user_setup(self,ipythondir,rc_suffix,mode='install'):
|
|
|
"""Install the user configuration directory.
|
|
|
|
|
|
Can be called when running for the first time or to upgrade the user's
|
|
|
.ipython/ directory with the mode parameter. Valid modes are 'install'
|
|
|
and 'upgrade'."""
|
|
|
|
|
|
def wait():
|
|
|
try:
|
|
|
raw_input("Please press <RETURN> to start IPython.")
|
|
|
except EOFError:
|
|
|
print >> Term.cout
|
|
|
print '*'*70
|
|
|
|
|
|
cwd = os.getcwd() # remember where we started
|
|
|
glb = glob.glob
|
|
|
print '*'*70
|
|
|
if mode == 'install':
|
|
|
print \
|
|
|
"""Welcome to IPython. I will try to create a personal configuration directory
|
|
|
where you can customize many aspects of IPython's functionality in:\n"""
|
|
|
else:
|
|
|
print 'I am going to upgrade your configuration in:'
|
|
|
|
|
|
print ipythondir
|
|
|
|
|
|
rcdirend = os.path.join('IPython','UserConfig')
|
|
|
cfg = lambda d: os.path.join(d,rcdirend)
|
|
|
try:
|
|
|
rcdir = filter(os.path.isdir,map(cfg,sys.path))[0]
|
|
|
except IOError:
|
|
|
warning = """
|
|
|
Installation error. IPython's directory was not found.
|
|
|
|
|
|
Check the following:
|
|
|
|
|
|
The ipython/IPython directory should be in a directory belonging to your
|
|
|
PYTHONPATH environment variable (that is, it should be in a directory
|
|
|
belonging to sys.path). You can copy it explicitly there or just link to it.
|
|
|
|
|
|
IPython will proceed with builtin defaults.
|
|
|
"""
|
|
|
warn(warning)
|
|
|
wait()
|
|
|
return
|
|
|
|
|
|
if mode == 'install':
|
|
|
try:
|
|
|
shutil.copytree(rcdir,ipythondir)
|
|
|
os.chdir(ipythondir)
|
|
|
rc_files = glb("ipythonrc*")
|
|
|
for rc_file in rc_files:
|
|
|
os.rename(rc_file,rc_file+rc_suffix)
|
|
|
except:
|
|
|
warning = """
|
|
|
|
|
|
There was a problem with the installation:
|
|
|
%s
|
|
|
Try to correct it or contact the developers if you think it's a bug.
|
|
|
IPython will proceed with builtin defaults.""" % sys.exc_info()[1]
|
|
|
warn(warning)
|
|
|
wait()
|
|
|
return
|
|
|
|
|
|
elif mode == 'upgrade':
|
|
|
try:
|
|
|
os.chdir(ipythondir)
|
|
|
except:
|
|
|
print """
|
|
|
Can not upgrade: changing to directory %s failed. Details:
|
|
|
%s
|
|
|
""" % (ipythondir,sys.exc_info()[1])
|
|
|
wait()
|
|
|
return
|
|
|
else:
|
|
|
sources = glb(os.path.join(rcdir,'[A-Za-z]*'))
|
|
|
for new_full_path in sources:
|
|
|
new_filename = os.path.basename(new_full_path)
|
|
|
if new_filename.startswith('ipythonrc'):
|
|
|
new_filename = new_filename + rc_suffix
|
|
|
# The config directory should only contain files, skip any
|
|
|
# directories which may be there (like CVS)
|
|
|
if os.path.isdir(new_full_path):
|
|
|
continue
|
|
|
if os.path.exists(new_filename):
|
|
|
old_file = new_filename+'.old'
|
|
|
if os.path.exists(old_file):
|
|
|
os.remove(old_file)
|
|
|
os.rename(new_filename,old_file)
|
|
|
shutil.copy(new_full_path,new_filename)
|
|
|
else:
|
|
|
raise ValueError,'unrecognized mode for install:',`mode`
|
|
|
|
|
|
# Fix line-endings to those native to each platform in the config
|
|
|
# directory.
|
|
|
try:
|
|
|
os.chdir(ipythondir)
|
|
|
except:
|
|
|
print """
|
|
|
Problem: changing to directory %s failed.
|
|
|
Details:
|
|
|
%s
|
|
|
|
|
|
Some configuration files may have incorrect line endings. This should not
|
|
|
cause any problems during execution. """ % (ipythondir,sys.exc_info()[1])
|
|
|
wait()
|
|
|
else:
|
|
|
for fname in glb('ipythonrc*'):
|
|
|
try:
|
|
|
native_line_ends(fname,backup=0)
|
|
|
except IOError:
|
|
|
pass
|
|
|
|
|
|
if mode == 'install':
|
|
|
print """
|
|
|
Successful installation!
|
|
|
|
|
|
Please read the sections 'Initial Configuration' and 'Quick Tips' in the
|
|
|
IPython manual (there are both HTML and PDF versions supplied with the
|
|
|
distribution) to make sure that your system environment is properly configured
|
|
|
to take advantage of IPython's features.
|
|
|
|
|
|
Important note: the configuration system has changed! The old system is
|
|
|
still in place, but its setting may be partly overridden by the settings in
|
|
|
"~/.ipython/ipy_user_conf.py" config file. Please take a look at the file
|
|
|
if some of the new settings bother you.
|
|
|
|
|
|
"""
|
|
|
else:
|
|
|
print """
|
|
|
Successful upgrade!
|
|
|
|
|
|
All files in your directory:
|
|
|
%(ipythondir)s
|
|
|
which would have been overwritten by the upgrade were backed up with a .old
|
|
|
extension. If you had made particular customizations in those files you may
|
|
|
want to merge them back into the new files.""" % locals()
|
|
|
wait()
|
|
|
os.chdir(cwd)
|
|
|
# end user_setup()
|
|
|
|
|
|
def atexit_operations(self):
|
|
|
"""This will be executed at the time of exit.
|
|
|
|
|
|
Saving of persistent data should be performed here. """
|
|
|
|
|
|
#print '*** IPython exit cleanup ***' # dbg
|
|
|
# input history
|
|
|
self.savehist()
|
|
|
|
|
|
# Cleanup all tempfiles left around
|
|
|
for tfile in self.tempfiles:
|
|
|
try:
|
|
|
os.unlink(tfile)
|
|
|
except OSError:
|
|
|
pass
|
|
|
|
|
|
# save the "persistent data" catch-all dictionary
|
|
|
self.hooks.shutdown_hook()
|
|
|
|
|
|
def savehist(self):
|
|
|
"""Save input history to a file (via readline library)."""
|
|
|
try:
|
|
|
self.readline.write_history_file(self.histfile)
|
|
|
except:
|
|
|
print 'Unable to save IPython command history to file: ' + \
|
|
|
`self.histfile`
|
|
|
|
|
|
def pre_readline(self):
|
|
|
"""readline hook to be used at the start of each line.
|
|
|
|
|
|
Currently it handles auto-indent only."""
|
|
|
|
|
|
#debugx('self.indent_current_nsp','pre_readline:')
|
|
|
self.readline.insert_text(self.indent_current_str())
|
|
|
|
|
|
def init_readline(self):
|
|
|
"""Command history completion/saving/reloading."""
|
|
|
|
|
|
import IPython.rlineimpl as readline
|
|
|
if not readline.have_readline:
|
|
|
self.has_readline = 0
|
|
|
self.readline = None
|
|
|
# no point in bugging windows users with this every time:
|
|
|
warn('Readline services not available on this platform.')
|
|
|
else:
|
|
|
sys.modules['readline'] = readline
|
|
|
import atexit
|
|
|
from IPython.completer import IPCompleter
|
|
|
self.Completer = IPCompleter(self,
|
|
|
self.user_ns,
|
|
|
self.user_global_ns,
|
|
|
self.rc.readline_omit__names,
|
|
|
self.alias_table)
|
|
|
|
|
|
# Platform-specific configuration
|
|
|
if os.name == 'nt':
|
|
|
self.readline_startup_hook = readline.set_pre_input_hook
|
|
|
else:
|
|
|
self.readline_startup_hook = readline.set_startup_hook
|
|
|
|
|
|
# Load user's initrc file (readline config)
|
|
|
inputrc_name = os.environ.get('INPUTRC')
|
|
|
if inputrc_name is None:
|
|
|
home_dir = get_home_dir()
|
|
|
if home_dir is not None:
|
|
|
inputrc_name = os.path.join(home_dir,'.inputrc')
|
|
|
if os.path.isfile(inputrc_name):
|
|
|
try:
|
|
|
readline.read_init_file(inputrc_name)
|
|
|
except:
|
|
|
warn('Problems reading readline initialization file <%s>'
|
|
|
% inputrc_name)
|
|
|
|
|
|
self.has_readline = 1
|
|
|
self.readline = readline
|
|
|
# save this in sys so embedded copies can restore it properly
|
|
|
sys.ipcompleter = self.Completer.complete
|
|
|
readline.set_completer(self.Completer.complete)
|
|
|
|
|
|
# Configure readline according to user's prefs
|
|
|
for rlcommand in self.rc.readline_parse_and_bind:
|
|
|
readline.parse_and_bind(rlcommand)
|
|
|
|
|
|
# remove some chars from the delimiters list
|
|
|
delims = readline.get_completer_delims()
|
|
|
delims = delims.translate(string._idmap,
|
|
|
self.rc.readline_remove_delims)
|
|
|
readline.set_completer_delims(delims)
|
|
|
# otherwise we end up with a monster history after a while:
|
|
|
readline.set_history_length(1000)
|
|
|
try:
|
|
|
#print '*** Reading readline history' # dbg
|
|
|
readline.read_history_file(self.histfile)
|
|
|
except IOError:
|
|
|
pass # It doesn't exist yet.
|
|
|
|
|
|
atexit.register(self.atexit_operations)
|
|
|
del atexit
|
|
|
|
|
|
# Configure auto-indent for all platforms
|
|
|
self.set_autoindent(self.rc.autoindent)
|
|
|
|
|
|
def _should_recompile(self,e):
|
|
|
"""Utility routine for edit_syntax_error"""
|
|
|
|
|
|
if e.filename in ('<ipython console>','<input>','<string>',
|
|
|
'<console>','<BackgroundJob compilation>',
|
|
|
None):
|
|
|
|
|
|
return False
|
|
|
try:
|
|
|
if (self.rc.autoedit_syntax and
|
|
|
not ask_yes_no('Return to editor to correct syntax error? '
|
|
|
'[Y/n] ','y')):
|
|
|
return False
|
|
|
except EOFError:
|
|
|
return False
|
|
|
|
|
|
def int0(x):
|
|
|
try:
|
|
|
return int(x)
|
|
|
except TypeError:
|
|
|
return 0
|
|
|
# always pass integer line and offset values to editor hook
|
|
|
self.hooks.fix_error_editor(e.filename,
|
|
|
int0(e.lineno),int0(e.offset),e.msg)
|
|
|
return True
|
|
|
|
|
|
def edit_syntax_error(self):
|
|
|
"""The bottom half of the syntax error handler called in the main loop.
|
|
|
|
|
|
Loop until syntax error is fixed or user cancels.
|
|
|
"""
|
|
|
|
|
|
while self.SyntaxTB.last_syntax_error:
|
|
|
# copy and clear last_syntax_error
|
|
|
err = self.SyntaxTB.clear_err_state()
|
|
|
if not self._should_recompile(err):
|
|
|
return
|
|
|
try:
|
|
|
# may set last_syntax_error again if a SyntaxError is raised
|
|
|
self.safe_execfile(err.filename,self.shell.user_ns)
|
|
|
except:
|
|
|
self.showtraceback()
|
|
|
else:
|
|
|
try:
|
|
|
f = file(err.filename)
|
|
|
try:
|
|
|
sys.displayhook(f.read())
|
|
|
finally:
|
|
|
f.close()
|
|
|
except:
|
|
|
self.showtraceback()
|
|
|
|
|
|
def showsyntaxerror(self, filename=None):
|
|
|
"""Display the syntax error that just occurred.
|
|
|
|
|
|
This doesn't display a stack trace because there isn't one.
|
|
|
|
|
|
If a filename is given, it is stuffed in the exception instead
|
|
|
of what was there before (because Python's parser always uses
|
|
|
"<string>" when reading from a string).
|
|
|
"""
|
|
|
etype, value, last_traceback = sys.exc_info()
|
|
|
|
|
|
# See note about these variables in showtraceback() below
|
|
|
sys.last_type = etype
|
|
|
sys.last_value = value
|
|
|
sys.last_traceback = last_traceback
|
|
|
|
|
|
if filename and etype is SyntaxError:
|
|
|
# Work hard to stuff the correct filename in the exception
|
|
|
try:
|
|
|
msg, (dummy_filename, lineno, offset, line) = value
|
|
|
except:
|
|
|
# Not the format we expect; leave it alone
|
|
|
pass
|
|
|
else:
|
|
|
# Stuff in the right filename
|
|
|
try:
|
|
|
# Assume SyntaxError is a class exception
|
|
|
value = SyntaxError(msg, (filename, lineno, offset, line))
|
|
|
except:
|
|
|
# If that failed, assume SyntaxError is a string
|
|
|
value = msg, (filename, lineno, offset, line)
|
|
|
self.SyntaxTB(etype,value,[])
|
|
|
|
|
|
def debugger(self):
|
|
|
"""Call the pdb debugger."""
|
|
|
|
|
|
if not self.rc.pdb:
|
|
|
return
|
|
|
pdb.pm()
|
|
|
|
|
|
def showtraceback(self,exc_tuple = None,filename=None,tb_offset=None):
|
|
|
"""Display the exception that just occurred.
|
|
|
|
|
|
If nothing is known about the exception, this is the method which
|
|
|
should be used throughout the code for presenting user tracebacks,
|
|
|
rather than directly invoking the InteractiveTB object.
|
|
|
|
|
|
A specific showsyntaxerror() also exists, but this method can take
|
|
|
care of calling it if needed, so unless you are explicitly catching a
|
|
|
SyntaxError exception, don't try to analyze the stack manually and
|
|
|
simply call this method."""
|
|
|
|
|
|
# Though this won't be called by syntax errors in the input line,
|
|
|
# there may be SyntaxError cases whith imported code.
|
|
|
if exc_tuple is None:
|
|
|
etype, value, tb = sys.exc_info()
|
|
|
else:
|
|
|
etype, value, tb = exc_tuple
|
|
|
if etype is SyntaxError:
|
|
|
self.showsyntaxerror(filename)
|
|
|
else:
|
|
|
# WARNING: these variables are somewhat deprecated and not
|
|
|
# necessarily safe to use in a threaded environment, but tools
|
|
|
# like pdb depend on their existence, so let's set them. If we
|
|
|
# find problems in the field, we'll need to revisit their use.
|
|
|
sys.last_type = etype
|
|
|
sys.last_value = value
|
|
|
sys.last_traceback = tb
|
|
|
|
|
|
self.InteractiveTB(etype,value,tb,tb_offset=tb_offset)
|
|
|
if self.InteractiveTB.call_pdb and self.has_readline:
|
|
|
# pdb mucks up readline, fix it back
|
|
|
self.readline.set_completer(self.Completer.complete)
|
|
|
|
|
|
def mainloop(self,banner=None):
|
|
|
"""Creates the local namespace and starts the mainloop.
|
|
|
|
|
|
If an optional banner argument is given, it will override the
|
|
|
internally created default banner."""
|
|
|
|
|
|
if self.rc.c: # Emulate Python's -c option
|
|
|
self.exec_init_cmd()
|
|
|
if banner is None:
|
|
|
if not self.rc.banner:
|
|
|
banner = ''
|
|
|
# banner is string? Use it directly!
|
|
|
elif isinstance(self.rc.banner,basestring):
|
|
|
banner = self.rc.banner
|
|
|
else:
|
|
|
banner = self.BANNER+self.banner2
|
|
|
|
|
|
self.interact(banner)
|
|
|
|
|
|
def exec_init_cmd(self):
|
|
|
"""Execute a command given at the command line.
|
|
|
|
|
|
This emulates Python's -c option."""
|
|
|
|
|
|
#sys.argv = ['-c']
|
|
|
self.push(self.rc.c)
|
|
|
|
|
|
def embed_mainloop(self,header='',local_ns=None,global_ns=None,stack_depth=0):
|
|
|
"""Embeds IPython into a running python program.
|
|
|
|
|
|
Input:
|
|
|
|
|
|
- header: An optional header message can be specified.
|
|
|
|
|
|
- local_ns, global_ns: working namespaces. If given as None, the
|
|
|
IPython-initialized one is updated with __main__.__dict__, so that
|
|
|
program variables become visible but user-specific configuration
|
|
|
remains possible.
|
|
|
|
|
|
- stack_depth: specifies how many levels in the stack to go to
|
|
|
looking for namespaces (when local_ns and global_ns are None). This
|
|
|
allows an intermediate caller to make sure that this function gets
|
|
|
the namespace from the intended level in the stack. By default (0)
|
|
|
it will get its locals and globals from the immediate caller.
|
|
|
|
|
|
Warning: it's possible to use this in a program which is being run by
|
|
|
IPython itself (via %run), but some funny things will happen (a few
|
|
|
globals get overwritten). In the future this will be cleaned up, as
|
|
|
there is no fundamental reason why it can't work perfectly."""
|
|
|
|
|
|
# Get locals and globals from caller
|
|
|
if local_ns is None or global_ns is None:
|
|
|
call_frame = sys._getframe(stack_depth).f_back
|
|
|
|
|
|
if local_ns is None:
|
|
|
local_ns = call_frame.f_locals
|
|
|
if global_ns is None:
|
|
|
global_ns = call_frame.f_globals
|
|
|
|
|
|
# Update namespaces and fire up interpreter
|
|
|
|
|
|
# The global one is easy, we can just throw it in
|
|
|
self.user_global_ns = global_ns
|
|
|
|
|
|
# but the user/local one is tricky: ipython needs it to store internal
|
|
|
# data, but we also need the locals. We'll copy locals in the user
|
|
|
# one, but will track what got copied so we can delete them at exit.
|
|
|
# This is so that a later embedded call doesn't see locals from a
|
|
|
# previous call (which most likely existed in a separate scope).
|
|
|
local_varnames = local_ns.keys()
|
|
|
self.user_ns.update(local_ns)
|
|
|
|
|
|
# Patch for global embedding to make sure that things don't overwrite
|
|
|
# user globals accidentally. Thanks to Richard <rxe@renre-europe.com>
|
|
|
# FIXME. Test this a bit more carefully (the if.. is new)
|
|
|
if local_ns is None and global_ns is None:
|
|
|
self.user_global_ns.update(__main__.__dict__)
|
|
|
|
|
|
# make sure the tab-completer has the correct frame information, so it
|
|
|
# actually completes using the frame's locals/globals
|
|
|
self.set_completer_frame()
|
|
|
|
|
|
# before activating the interactive mode, we need to make sure that
|
|
|
# all names in the builtin namespace needed by ipython point to
|
|
|
# ourselves, and not to other instances.
|
|
|
self.add_builtins()
|
|
|
|
|
|
self.interact(header)
|
|
|
|
|
|
# now, purge out the user namespace from anything we might have added
|
|
|
# from the caller's local namespace
|
|
|
delvar = self.user_ns.pop
|
|
|
for var in local_varnames:
|
|
|
delvar(var,None)
|
|
|
# and clean builtins we may have overridden
|
|
|
self.clean_builtins()
|
|
|
|
|
|
def interact(self, banner=None):
|
|
|
"""Closely emulate the interactive Python console.
|
|
|
|
|
|
The optional banner argument specify the banner to print
|
|
|
before the first interaction; by default it prints a banner
|
|
|
similar to the one printed by the real Python interpreter,
|
|
|
followed by the current class name in parentheses (so as not
|
|
|
to confuse this with the real interpreter -- since it's so
|
|
|
close!).
|
|
|
|
|
|
"""
|
|
|
cprt = 'Type "copyright", "credits" or "license" for more information.'
|
|
|
if banner is None:
|
|
|
self.write("Python %s on %s\n%s\n(%s)\n" %
|
|
|
(sys.version, sys.platform, cprt,
|
|
|
self.__class__.__name__))
|
|
|
else:
|
|
|
self.write(banner)
|
|
|
|
|
|
more = 0
|
|
|
|
|
|
# Mark activity in the builtins
|
|
|
__builtin__.__dict__['__IPYTHON__active'] += 1
|
|
|
|
|
|
# exit_now is set by a call to %Exit or %Quit
|
|
|
self.exit_now = False
|
|
|
while not self.exit_now:
|
|
|
if more:
|
|
|
prompt = self.outputcache.prompt2
|
|
|
if self.autoindent:
|
|
|
self.readline_startup_hook(self.pre_readline)
|
|
|
else:
|
|
|
prompt = self.outputcache.prompt1
|
|
|
try:
|
|
|
line = self.raw_input(prompt,more)
|
|
|
if self.autoindent:
|
|
|
self.readline_startup_hook(None)
|
|
|
except KeyboardInterrupt:
|
|
|
self.write('\nKeyboardInterrupt\n')
|
|
|
self.resetbuffer()
|
|
|
# keep cache in sync with the prompt counter:
|
|
|
self.outputcache.prompt_count -= 1
|
|
|
|
|
|
if self.autoindent:
|
|
|
self.indent_current_nsp = 0
|
|
|
more = 0
|
|
|
except EOFError:
|
|
|
if self.autoindent:
|
|
|
self.readline_startup_hook(None)
|
|
|
self.write('\n')
|
|
|
self.exit()
|
|
|
except bdb.BdbQuit:
|
|
|
warn('The Python debugger has exited with a BdbQuit exception.\n'
|
|
|
'Because of how pdb handles the stack, it is impossible\n'
|
|
|
'for IPython to properly format this particular exception.\n'
|
|
|
'IPython will resume normal operation.')
|
|
|
except:
|
|
|
# exceptions here are VERY RARE, but they can be triggered
|
|
|
# asynchronously by signal handlers, for example.
|
|
|
self.showtraceback()
|
|
|
else:
|
|
|
more = self.push(line)
|
|
|
if (self.SyntaxTB.last_syntax_error and
|
|
|
self.rc.autoedit_syntax):
|
|
|
self.edit_syntax_error()
|
|
|
|
|
|
# We are off again...
|
|
|
__builtin__.__dict__['__IPYTHON__active'] -= 1
|
|
|
|
|
|
def excepthook(self, etype, value, tb):
|
|
|
"""One more defense for GUI apps that call sys.excepthook.
|
|
|
|
|
|
GUI frameworks like wxPython trap exceptions and call
|
|
|
sys.excepthook themselves. I guess this is a feature that
|
|
|
enables them to keep running after exceptions that would
|
|
|
otherwise kill their mainloop. This is a bother for IPython
|
|
|
which excepts to catch all of the program exceptions with a try:
|
|
|
except: statement.
|
|
|
|
|
|
Normally, IPython sets sys.excepthook to a CrashHandler instance, so if
|
|
|
any app directly invokes sys.excepthook, it will look to the user like
|
|
|
IPython crashed. In order to work around this, we can disable the
|
|
|
CrashHandler and replace it with this excepthook instead, which prints a
|
|
|
regular traceback using our InteractiveTB. In this fashion, apps which
|
|
|
call sys.excepthook will generate a regular-looking exception from
|
|
|
IPython, and the CrashHandler will only be triggered by real IPython
|
|
|
crashes.
|
|
|
|
|
|
This hook should be used sparingly, only in places which are not likely
|
|
|
to be true IPython errors.
|
|
|
"""
|
|
|
self.showtraceback((etype,value,tb),tb_offset=0)
|
|
|
|
|
|
def transform_alias(self, alias,rest=''):
|
|
|
""" Transform alias to system command string
|
|
|
|
|
|
"""
|
|
|
nargs,cmd = self.alias_table[alias]
|
|
|
if ' ' in cmd and os.path.isfile(cmd):
|
|
|
cmd = '"%s"' % cmd
|
|
|
|
|
|
# Expand the %l special to be the user's input line
|
|
|
if cmd.find('%l') >= 0:
|
|
|
cmd = cmd.replace('%l',rest)
|
|
|
rest = ''
|
|
|
if nargs==0:
|
|
|
# Simple, argument-less aliases
|
|
|
cmd = '%s %s' % (cmd,rest)
|
|
|
else:
|
|
|
# Handle aliases with positional arguments
|
|
|
args = rest.split(None,nargs)
|
|
|
if len(args)< nargs:
|
|
|
error('Alias <%s> requires %s arguments, %s given.' %
|
|
|
(alias,nargs,len(args)))
|
|
|
return None
|
|
|
cmd = '%s %s' % (cmd % tuple(args[:nargs]),' '.join(args[nargs:]))
|
|
|
# Now call the macro, evaluating in the user's namespace
|
|
|
|
|
|
return cmd
|
|
|
|
|
|
def call_alias(self,alias,rest=''):
|
|
|
"""Call an alias given its name and the rest of the line.
|
|
|
|
|
|
This is only used to provide backwards compatibility for users of
|
|
|
ipalias(), use of which is not recommended for anymore."""
|
|
|
|
|
|
# Now call the macro, evaluating in the user's namespace
|
|
|
cmd = self.transform_alias(alias, rest)
|
|
|
try:
|
|
|
self.system(cmd)
|
|
|
except:
|
|
|
self.showtraceback()
|
|
|
|
|
|
def indent_current_str(self):
|
|
|
"""return the current level of indentation as a string"""
|
|
|
return self.indent_current_nsp * ' '
|
|
|
|
|
|
def autoindent_update(self,line):
|
|
|
"""Keep track of the indent level."""
|
|
|
|
|
|
#debugx('line')
|
|
|
#debugx('self.indent_current_nsp')
|
|
|
if self.autoindent:
|
|
|
if line:
|
|
|
inisp = num_ini_spaces(line)
|
|
|
if inisp < self.indent_current_nsp:
|
|
|
self.indent_current_nsp = inisp
|
|
|
|
|
|
if line[-1] == ':':
|
|
|
self.indent_current_nsp += 4
|
|
|
elif dedent_re.match(line):
|
|
|
self.indent_current_nsp -= 4
|
|
|
else:
|
|
|
self.indent_current_nsp = 0
|
|
|
|
|
|
def runlines(self,lines):
|
|
|
"""Run a string of one or more lines of source.
|
|
|
|
|
|
This method is capable of running a string containing multiple source
|
|
|
lines, as if they had been entered at the IPython prompt. Since it
|
|
|
exposes IPython's processing machinery, the given strings can contain
|
|
|
magic calls (%magic), special shell access (!cmd), etc."""
|
|
|
|
|
|
# We must start with a clean buffer, in case this is run from an
|
|
|
# interactive IPython session (via a magic, for example).
|
|
|
self.resetbuffer()
|
|
|
lines = lines.split('\n')
|
|
|
more = 0
|
|
|
for line in lines:
|
|
|
# skip blank lines so we don't mess up the prompt counter, but do
|
|
|
# NOT skip even a blank line if we are in a code block (more is
|
|
|
# true)
|
|
|
if line or more:
|
|
|
more = self.push(self.prefilter(line,more))
|
|
|
# IPython's runsource returns None if there was an error
|
|
|
# compiling the code. This allows us to stop processing right
|
|
|
# away, so the user gets the error message at the right place.
|
|
|
if more is None:
|
|
|
break
|
|
|
# final newline in case the input didn't have it, so that the code
|
|
|
# actually does get executed
|
|
|
if more:
|
|
|
self.push('\n')
|
|
|
|
|
|
def runsource(self, source, filename='<input>', symbol='single'):
|
|
|
"""Compile and run some source in the interpreter.
|
|
|
|
|
|
Arguments are as for compile_command().
|
|
|
|
|
|
One several things can happen:
|
|
|
|
|
|
1) The input is incorrect; compile_command() raised an
|
|
|
exception (SyntaxError or OverflowError). A syntax traceback
|
|
|
will be printed by calling the showsyntaxerror() method.
|
|
|
|
|
|
2) The input is incomplete, and more input is required;
|
|
|
compile_command() returned None. Nothing happens.
|
|
|
|
|
|
3) The input is complete; compile_command() returned a code
|
|
|
object. The code is executed by calling self.runcode() (which
|
|
|
also handles run-time exceptions, except for SystemExit).
|
|
|
|
|
|
The return value is:
|
|
|
|
|
|
- True in case 2
|
|
|
|
|
|
- False in the other cases, unless an exception is raised, where
|
|
|
None is returned instead. This can be used by external callers to
|
|
|
know whether to continue feeding input or not.
|
|
|
|
|
|
The return value can be used to decide whether to use sys.ps1 or
|
|
|
sys.ps2 to prompt the next line."""
|
|
|
|
|
|
try:
|
|
|
code = self.compile(source,filename,symbol)
|
|
|
except (OverflowError, SyntaxError, ValueError):
|
|
|
# Case 1
|
|
|
self.showsyntaxerror(filename)
|
|
|
return None
|
|
|
|
|
|
if code is None:
|
|
|
# Case 2
|
|
|
return True
|
|
|
|
|
|
# Case 3
|
|
|
# We store the code object so that threaded shells and
|
|
|
# custom exception handlers can access all this info if needed.
|
|
|
# The source corresponding to this can be obtained from the
|
|
|
# buffer attribute as '\n'.join(self.buffer).
|
|
|
self.code_to_run = code
|
|
|
# now actually execute the code object
|
|
|
if self.runcode(code) == 0:
|
|
|
return False
|
|
|
else:
|
|
|
return None
|
|
|
|
|
|
def runcode(self,code_obj):
|
|
|
"""Execute a code object.
|
|
|
|
|
|
When an exception occurs, self.showtraceback() is called to display a
|
|
|
traceback.
|
|
|
|
|
|
Return value: a flag indicating whether the code to be run completed
|
|
|
successfully:
|
|
|
|
|
|
- 0: successful execution.
|
|
|
- 1: an error occurred.
|
|
|
"""
|
|
|
|
|
|
# Set our own excepthook in case the user code tries to call it
|
|
|
# directly, so that the IPython crash handler doesn't get triggered
|
|
|
old_excepthook,sys.excepthook = sys.excepthook, self.excepthook
|
|
|
|
|
|
# we save the original sys.excepthook in the instance, in case config
|
|
|
# code (such as magics) needs access to it.
|
|
|
self.sys_excepthook = old_excepthook
|
|
|
outflag = 1 # happens in more places, so it's easier as default
|
|
|
try:
|
|
|
try:
|
|
|
# Embedded instances require separate global/local namespaces
|
|
|
# so they can see both the surrounding (local) namespace and
|
|
|
# the module-level globals when called inside another function.
|
|
|
if self.embedded:
|
|
|
exec code_obj in self.user_global_ns, self.user_ns
|
|
|
# Normal (non-embedded) instances should only have a single
|
|
|
# namespace for user code execution, otherwise functions won't
|
|
|
# see interactive top-level globals.
|
|
|
else:
|
|
|
exec code_obj in self.user_ns
|
|
|
finally:
|
|
|
# Reset our crash handler in place
|
|
|
sys.excepthook = old_excepthook
|
|
|
except SystemExit:
|
|
|
self.resetbuffer()
|
|
|
self.showtraceback()
|
|
|
warn("Type exit or quit to exit IPython "
|
|
|
"(%Exit or %Quit do so unconditionally).",level=1)
|
|
|
except self.custom_exceptions:
|
|
|
etype,value,tb = sys.exc_info()
|
|
|
self.CustomTB(etype,value,tb)
|
|
|
except:
|
|
|
self.showtraceback()
|
|
|
else:
|
|
|
outflag = 0
|
|
|
if softspace(sys.stdout, 0):
|
|
|
print
|
|
|
# Flush out code object which has been run (and source)
|
|
|
self.code_to_run = None
|
|
|
return outflag
|
|
|
|
|
|
def push(self, line):
|
|
|
"""Push a line to the interpreter.
|
|
|
|
|
|
The line should not have a trailing newline; it may have
|
|
|
internal newlines. The line is appended to a buffer and the
|
|
|
interpreter's runsource() method is called with the
|
|
|
concatenated contents of the buffer as source. If this
|
|
|
indicates that the command was executed or invalid, the buffer
|
|
|
is reset; otherwise, the command is incomplete, and the buffer
|
|
|
is left as it was after the line was appended. The return
|
|
|
value is 1 if more input is required, 0 if the line was dealt
|
|
|
with in some way (this is the same as runsource()).
|
|
|
"""
|
|
|
|
|
|
# autoindent management should be done here, and not in the
|
|
|
# interactive loop, since that one is only seen by keyboard input. We
|
|
|
# need this done correctly even for code run via runlines (which uses
|
|
|
# push).
|
|
|
|
|
|
#print 'push line: <%s>' % line # dbg
|
|
|
self.autoindent_update(line)
|
|
|
|
|
|
self.buffer.append(line)
|
|
|
more = self.runsource('\n'.join(self.buffer), self.filename)
|
|
|
if not more:
|
|
|
self.resetbuffer()
|
|
|
return more
|
|
|
|
|
|
def resetbuffer(self):
|
|
|
"""Reset the input buffer."""
|
|
|
self.buffer[:] = []
|
|
|
|
|
|
def raw_input(self,prompt='',continue_prompt=False):
|
|
|
"""Write a prompt and read a line.
|
|
|
|
|
|
The returned line does not include the trailing newline.
|
|
|
When the user enters the EOF key sequence, EOFError is raised.
|
|
|
|
|
|
Optional inputs:
|
|
|
|
|
|
- prompt(''): a string to be printed to prompt the user.
|
|
|
|
|
|
- continue_prompt(False): whether this line is the first one or a
|
|
|
continuation in a sequence of inputs.
|
|
|
"""
|
|
|
|
|
|
line = raw_input_original(prompt)
|
|
|
|
|
|
# Try to be reasonably smart about not re-indenting pasted input more
|
|
|
# than necessary. We do this by trimming out the auto-indent initial
|
|
|
# spaces, if the user's actual input started itself with whitespace.
|
|
|
#debugx('self.buffer[-1]')
|
|
|
|
|
|
if self.autoindent:
|
|
|
if num_ini_spaces(line) > self.indent_current_nsp:
|
|
|
line = line[self.indent_current_nsp:]
|
|
|
self.indent_current_nsp = 0
|
|
|
|
|
|
# store the unfiltered input before the user has any chance to modify
|
|
|
# it.
|
|
|
if line.strip():
|
|
|
if continue_prompt:
|
|
|
self.input_hist_raw[-1] += '%s\n' % line
|
|
|
else:
|
|
|
self.input_hist_raw.append('%s\n' % line)
|
|
|
|
|
|
try:
|
|
|
lineout = self.prefilter(line,continue_prompt)
|
|
|
except:
|
|
|
# blanket except, in case a user-defined prefilter crashes, so it
|
|
|
# can't take all of ipython with it.
|
|
|
self.showtraceback()
|
|
|
return lineout
|
|
|
|
|
|
def split_user_input(self,line):
|
|
|
"""Split user input into pre-char, function part and rest."""
|
|
|
|
|
|
lsplit = self.line_split.match(line)
|
|
|
if lsplit is None: # no regexp match returns None
|
|
|
try:
|
|
|
iFun,theRest = line.split(None,1)
|
|
|
except ValueError:
|
|
|
iFun,theRest = line,''
|
|
|
pre = re.match('^(\s*)(.*)',line).groups()[0]
|
|
|
else:
|
|
|
pre,iFun,theRest = lsplit.groups()
|
|
|
|
|
|
#print 'line:<%s>' % line # dbg
|
|
|
#print 'pre <%s> iFun <%s> rest <%s>' % (pre,iFun.strip(),theRest) # dbg
|
|
|
return pre,iFun.strip(),theRest
|
|
|
|
|
|
def _prefilter(self, line, continue_prompt):
|
|
|
"""Calls different preprocessors, depending on the form of line."""
|
|
|
|
|
|
# All handlers *must* return a value, even if it's blank ('').
|
|
|
|
|
|
# Lines are NOT logged here. Handlers should process the line as
|
|
|
# needed, update the cache AND log it (so that the input cache array
|
|
|
# stays synced).
|
|
|
|
|
|
# This function is _very_ delicate, and since it's also the one which
|
|
|
# determines IPython's response to user input, it must be as efficient
|
|
|
# as possible. For this reason it has _many_ returns in it, trying
|
|
|
# always to exit as quickly as it can figure out what it needs to do.
|
|
|
|
|
|
# This function is the main responsible for maintaining IPython's
|
|
|
# behavior respectful of Python's semantics. So be _very_ careful if
|
|
|
# making changes to anything here.
|
|
|
|
|
|
#.....................................................................
|
|
|
# Code begins
|
|
|
|
|
|
#if line.startswith('%crash'): raise RuntimeError,'Crash now!' # dbg
|
|
|
|
|
|
# save the line away in case we crash, so the post-mortem handler can
|
|
|
# record it
|
|
|
self._last_input_line = line
|
|
|
|
|
|
#print '***line: <%s>' % line # dbg
|
|
|
|
|
|
# the input history needs to track even empty lines
|
|
|
stripped = line.strip()
|
|
|
|
|
|
if not stripped:
|
|
|
if not continue_prompt:
|
|
|
self.outputcache.prompt_count -= 1
|
|
|
return self.handle_normal(line,continue_prompt)
|
|
|
#return self.handle_normal('',continue_prompt)
|
|
|
|
|
|
# print '***cont',continue_prompt # dbg
|
|
|
# special handlers are only allowed for single line statements
|
|
|
if continue_prompt and not self.rc.multi_line_specials:
|
|
|
return self.handle_normal(line,continue_prompt)
|
|
|
|
|
|
|
|
|
# For the rest, we need the structure of the input
|
|
|
pre,iFun,theRest = self.split_user_input(line)
|
|
|
|
|
|
# See whether any pre-existing handler can take care of it
|
|
|
|
|
|
rewritten = self.hooks.input_prefilter(stripped)
|
|
|
if rewritten != stripped: # ok, some prefilter did something
|
|
|
rewritten = pre + rewritten # add indentation
|
|
|
return self.handle_normal(rewritten)
|
|
|
|
|
|
#print 'pre <%s> iFun <%s> rest <%s>' % (pre,iFun,theRest) # dbg
|
|
|
|
|
|
# First check for explicit escapes in the last/first character
|
|
|
handler = None
|
|
|
if line[-1] == self.ESC_HELP:
|
|
|
handler = self.esc_handlers.get(line[-1]) # the ? can be at the end
|
|
|
if handler is None:
|
|
|
# look at the first character of iFun, NOT of line, so we skip
|
|
|
# leading whitespace in multiline input
|
|
|
handler = self.esc_handlers.get(iFun[0:1])
|
|
|
if handler is not None:
|
|
|
return handler(line,continue_prompt,pre,iFun,theRest)
|
|
|
# Emacs ipython-mode tags certain input lines
|
|
|
if line.endswith('# PYTHON-MODE'):
|
|
|
return self.handle_emacs(line,continue_prompt)
|
|
|
|
|
|
# Next, check if we can automatically execute this thing
|
|
|
|
|
|
# Allow ! in multi-line statements if multi_line_specials is on:
|
|
|
if continue_prompt and self.rc.multi_line_specials and \
|
|
|
iFun.startswith(self.ESC_SHELL):
|
|
|
return self.handle_shell_escape(line,continue_prompt,
|
|
|
pre=pre,iFun=iFun,
|
|
|
theRest=theRest)
|
|
|
|
|
|
# Let's try to find if the input line is a magic fn
|
|
|
oinfo = None
|
|
|
if hasattr(self,'magic_'+iFun):
|
|
|
# WARNING: _ofind uses getattr(), so it can consume generators and
|
|
|
# cause other side effects.
|
|
|
oinfo = self._ofind(iFun) # FIXME - _ofind is part of Magic
|
|
|
if oinfo['ismagic']:
|
|
|
# Be careful not to call magics when a variable assignment is
|
|
|
# being made (ls='hi', for example)
|
|
|
if self.rc.automagic and \
|
|
|
(len(theRest)==0 or theRest[0] not in '!=()<>,') and \
|
|
|
(self.rc.multi_line_specials or not continue_prompt):
|
|
|
return self.handle_magic(line,continue_prompt,
|
|
|
pre,iFun,theRest)
|
|
|
else:
|
|
|
return self.handle_normal(line,continue_prompt)
|
|
|
|
|
|
# If the rest of the line begins with an (in)equality, assginment or
|
|
|
# function call, we should not call _ofind but simply execute it.
|
|
|
# This avoids spurious geattr() accesses on objects upon assignment.
|
|
|
#
|
|
|
# It also allows users to assign to either alias or magic names true
|
|
|
# python variables (the magic/alias systems always take second seat to
|
|
|
# true python code).
|
|
|
if theRest and theRest[0] in '!=()':
|
|
|
return self.handle_normal(line,continue_prompt)
|
|
|
|
|
|
if oinfo is None:
|
|
|
# let's try to ensure that _oinfo is ONLY called when autocall is
|
|
|
# on. Since it has inevitable potential side effects, at least
|
|
|
# having autocall off should be a guarantee to the user that no
|
|
|
# weird things will happen.
|
|
|
|
|
|
if self.rc.autocall:
|
|
|
oinfo = self._ofind(iFun) # FIXME - _ofind is part of Magic
|
|
|
else:
|
|
|
# in this case, all that's left is either an alias or
|
|
|
# processing the line normally.
|
|
|
if iFun in self.alias_table:
|
|
|
# if autocall is off, by not running _ofind we won't know
|
|
|
# whether the given name may also exist in one of the
|
|
|
# user's namespace. At this point, it's best to do a
|
|
|
# quick check just to be sure that we don't let aliases
|
|
|
# shadow variables.
|
|
|
head = iFun.split('.',1)[0]
|
|
|
if head in self.user_ns or head in self.internal_ns \
|
|
|
or head in __builtin__.__dict__:
|
|
|
return self.handle_normal(line,continue_prompt)
|
|
|
else:
|
|
|
return self.handle_alias(line,continue_prompt,
|
|
|
pre,iFun,theRest)
|
|
|
|
|
|
else:
|
|
|
return self.handle_normal(line,continue_prompt)
|
|
|
|
|
|
if not oinfo['found']:
|
|
|
return self.handle_normal(line,continue_prompt)
|
|
|
else:
|
|
|
#print 'pre<%s> iFun <%s> rest <%s>' % (pre,iFun,theRest) # dbg
|
|
|
if oinfo['isalias']:
|
|
|
return self.handle_alias(line,continue_prompt,
|
|
|
pre,iFun,theRest)
|
|
|
|
|
|
if (self.rc.autocall
|
|
|
and
|
|
|
(
|
|
|
#only consider exclusion re if not "," or ";" autoquoting
|
|
|
(pre == self.ESC_QUOTE or pre == self.ESC_QUOTE2
|
|
|
or pre == self.ESC_PAREN) or
|
|
|
(not self.re_exclude_auto.match(theRest)))
|
|
|
and
|
|
|
self.re_fun_name.match(iFun) and
|
|
|
callable(oinfo['obj'])) :
|
|
|
#print 'going auto' # dbg
|
|
|
return self.handle_auto(line,continue_prompt,
|
|
|
pre,iFun,theRest,oinfo['obj'])
|
|
|
else:
|
|
|
#print 'was callable?', callable(oinfo['obj']) # dbg
|
|
|
return self.handle_normal(line,continue_prompt)
|
|
|
|
|
|
# If we get here, we have a normal Python line. Log and return.
|
|
|
return self.handle_normal(line,continue_prompt)
|
|
|
|
|
|
def _prefilter_dumb(self, line, continue_prompt):
|
|
|
"""simple prefilter function, for debugging"""
|
|
|
return self.handle_normal(line,continue_prompt)
|
|
|
|
|
|
# Set the default prefilter() function (this can be user-overridden)
|
|
|
prefilter = _prefilter
|
|
|
|
|
|
def handle_normal(self,line,continue_prompt=None,
|
|
|
pre=None,iFun=None,theRest=None):
|
|
|
"""Handle normal input lines. Use as a template for handlers."""
|
|
|
|
|
|
# With autoindent on, we need some way to exit the input loop, and I
|
|
|
# don't want to force the user to have to backspace all the way to
|
|
|
# clear the line. The rule will be in this case, that either two
|
|
|
# lines of pure whitespace in a row, or a line of pure whitespace but
|
|
|
# of a size different to the indent level, will exit the input loop.
|
|
|
|
|
|
if (continue_prompt and self.autoindent and line.isspace() and
|
|
|
(0 < abs(len(line) - self.indent_current_nsp) <= 2 or
|
|
|
(self.buffer[-1]).isspace() )):
|
|
|
line = ''
|
|
|
|
|
|
self.log(line,continue_prompt)
|
|
|
return line
|
|
|
|
|
|
def handle_alias(self,line,continue_prompt=None,
|
|
|
pre=None,iFun=None,theRest=None):
|
|
|
"""Handle alias input lines. """
|
|
|
|
|
|
# pre is needed, because it carries the leading whitespace. Otherwise
|
|
|
# aliases won't work in indented sections.
|
|
|
transformed = self.transform_alias(iFun, theRest)
|
|
|
line_out = '%s_ip.system(%s)' % (pre, make_quoted_expr( transformed ))
|
|
|
self.log(line,line_out,continue_prompt)
|
|
|
return line_out
|
|
|
|
|
|
def handle_shell_escape(self, line, continue_prompt=None,
|
|
|
pre=None,iFun=None,theRest=None):
|
|
|
"""Execute the line in a shell, empty return value"""
|
|
|
|
|
|
#print 'line in :', `line` # dbg
|
|
|
# Example of a special handler. Others follow a similar pattern.
|
|
|
if line.lstrip().startswith('!!'):
|
|
|
# rewrite iFun/theRest to properly hold the call to %sx and
|
|
|
# the actual command to be executed, so handle_magic can work
|
|
|
# correctly
|
|
|
theRest = '%s %s' % (iFun[2:],theRest)
|
|
|
iFun = 'sx'
|
|
|
return self.handle_magic('%ssx %s' % (self.ESC_MAGIC,
|
|
|
line.lstrip()[2:]),
|
|
|
continue_prompt,pre,iFun,theRest)
|
|
|
else:
|
|
|
cmd=line.lstrip().lstrip('!')
|
|
|
line_out = '%s_ip.system(%s)' % (pre,make_quoted_expr(cmd))
|
|
|
# update cache/log and return
|
|
|
self.log(line,line_out,continue_prompt)
|
|
|
return line_out
|
|
|
|
|
|
def handle_magic(self, line, continue_prompt=None,
|
|
|
pre=None,iFun=None,theRest=None):
|
|
|
"""Execute magic functions."""
|
|
|
|
|
|
|
|
|
cmd = '%s_ip.magic(%s)' % (pre,make_quoted_expr(iFun + " " + theRest))
|
|
|
self.log(line,cmd,continue_prompt)
|
|
|
#print 'in handle_magic, cmd=<%s>' % cmd # dbg
|
|
|
return cmd
|
|
|
|
|
|
def handle_auto(self, line, continue_prompt=None,
|
|
|
pre=None,iFun=None,theRest=None,obj=None):
|
|
|
"""Hande lines which can be auto-executed, quoting if requested."""
|
|
|
|
|
|
#print 'pre <%s> iFun <%s> rest <%s>' % (pre,iFun,theRest) # dbg
|
|
|
|
|
|
# This should only be active for single-line input!
|
|
|
if continue_prompt:
|
|
|
self.log(line,line,continue_prompt)
|
|
|
return line
|
|
|
|
|
|
auto_rewrite = True
|
|
|
|
|
|
if pre == self.ESC_QUOTE:
|
|
|
# Auto-quote splitting on whitespace
|
|
|
newcmd = '%s("%s")' % (iFun,'", "'.join(theRest.split()) )
|
|
|
elif pre == self.ESC_QUOTE2:
|
|
|
# Auto-quote whole string
|
|
|
newcmd = '%s("%s")' % (iFun,theRest)
|
|
|
elif pre == self.ESC_PAREN:
|
|
|
newcmd = '%s(%s)' % (iFun,",".join(theRest.split()))
|
|
|
else:
|
|
|
# Auto-paren.
|
|
|
# We only apply it to argument-less calls if the autocall
|
|
|
# parameter is set to 2. We only need to check that autocall is <
|
|
|
# 2, since this function isn't called unless it's at least 1.
|
|
|
if not theRest and (self.rc.autocall < 2):
|
|
|
newcmd = '%s %s' % (iFun,theRest)
|
|
|
auto_rewrite = False
|
|
|
else:
|
|
|
if theRest.startswith('['):
|
|
|
if hasattr(obj,'__getitem__'):
|
|
|
# Don't autocall in this case: item access for an object
|
|
|
# which is BOTH callable and implements __getitem__.
|
|
|
newcmd = '%s %s' % (iFun,theRest)
|
|
|
auto_rewrite = False
|
|
|
else:
|
|
|
# if the object doesn't support [] access, go ahead and
|
|
|
# autocall
|
|
|
newcmd = '%s(%s)' % (iFun.rstrip(),theRest)
|
|
|
elif theRest.endswith(';'):
|
|
|
newcmd = '%s(%s);' % (iFun.rstrip(),theRest[:-1])
|
|
|
else:
|
|
|
newcmd = '%s(%s)' % (iFun.rstrip(), theRest)
|
|
|
|
|
|
if auto_rewrite:
|
|
|
print >>Term.cout, self.outputcache.prompt1.auto_rewrite() + newcmd
|
|
|
# log what is now valid Python, not the actual user input (without the
|
|
|
# final newline)
|
|
|
self.log(line,newcmd,continue_prompt)
|
|
|
return newcmd
|
|
|
|
|
|
def handle_help(self, line, continue_prompt=None,
|
|
|
pre=None,iFun=None,theRest=None):
|
|
|
"""Try to get some help for the object.
|
|
|
|
|
|
obj? or ?obj -> basic information.
|
|
|
obj?? or ??obj -> more details.
|
|
|
"""
|
|
|
|
|
|
# We need to make sure that we don't process lines which would be
|
|
|
# otherwise valid python, such as "x=1 # what?"
|
|
|
try:
|
|
|
codeop.compile_command(line)
|
|
|
except SyntaxError:
|
|
|
# We should only handle as help stuff which is NOT valid syntax
|
|
|
if line[0]==self.ESC_HELP:
|
|
|
line = line[1:]
|
|
|
elif line[-1]==self.ESC_HELP:
|
|
|
line = line[:-1]
|
|
|
self.log(line,'#?'+line,continue_prompt)
|
|
|
if line:
|
|
|
self.magic_pinfo(line)
|
|
|
else:
|
|
|
page(self.usage,screen_lines=self.rc.screen_length)
|
|
|
return '' # Empty string is needed here!
|
|
|
except:
|
|
|
# Pass any other exceptions through to the normal handler
|
|
|
return self.handle_normal(line,continue_prompt)
|
|
|
else:
|
|
|
# If the code compiles ok, we should handle it normally
|
|
|
return self.handle_normal(line,continue_prompt)
|
|
|
|
|
|
def getapi(self):
|
|
|
""" Get an IPApi object for this shell instance
|
|
|
|
|
|
Getting an IPApi object is always preferable to accessing the shell
|
|
|
directly, but this holds true especially for extensions.
|
|
|
|
|
|
It should always be possible to implement an extension with IPApi
|
|
|
alone. If not, contact maintainer to request an addition.
|
|
|
|
|
|
"""
|
|
|
return self.api
|
|
|
|
|
|
def handle_emacs(self,line,continue_prompt=None,
|
|
|
pre=None,iFun=None,theRest=None):
|
|
|
"""Handle input lines marked by python-mode."""
|
|
|
|
|
|
# Currently, nothing is done. Later more functionality can be added
|
|
|
# here if needed.
|
|
|
|
|
|
# The input cache shouldn't be updated
|
|
|
|
|
|
return line
|
|
|
|
|
|
def mktempfile(self,data=None):
|
|
|
"""Make a new tempfile and return its filename.
|
|
|
|
|
|
This makes a call to tempfile.mktemp, but it registers the created
|
|
|
filename internally so ipython cleans it up at exit time.
|
|
|
|
|
|
Optional inputs:
|
|
|
|
|
|
- data(None): if data is given, it gets written out to the temp file
|
|
|
immediately, and the file is closed again."""
|
|
|
|
|
|
filename = tempfile.mktemp('.py','ipython_edit_')
|
|
|
self.tempfiles.append(filename)
|
|
|
|
|
|
if data:
|
|
|
tmp_file = open(filename,'w')
|
|
|
tmp_file.write(data)
|
|
|
tmp_file.close()
|
|
|
return filename
|
|
|
|
|
|
def write(self,data):
|
|
|
"""Write a string to the default output"""
|
|
|
Term.cout.write(data)
|
|
|
|
|
|
def write_err(self,data):
|
|
|
"""Write a string to the default error output"""
|
|
|
Term.cerr.write(data)
|
|
|
|
|
|
def exit(self):
|
|
|
"""Handle interactive exit.
|
|
|
|
|
|
This method sets the exit_now attribute."""
|
|
|
|
|
|
if self.rc.confirm_exit:
|
|
|
if ask_yes_no('Do you really want to exit ([y]/n)?','y'):
|
|
|
self.exit_now = True
|
|
|
else:
|
|
|
self.exit_now = True
|
|
|
return self.exit_now
|
|
|
|
|
|
def safe_execfile(self,fname,*where,**kw):
|
|
|
fname = os.path.expanduser(fname)
|
|
|
|
|
|
# find things also in current directory
|
|
|
dname = os.path.dirname(fname)
|
|
|
if not sys.path.count(dname):
|
|
|
sys.path.append(dname)
|
|
|
|
|
|
try:
|
|
|
xfile = open(fname)
|
|
|
except:
|
|
|
print >> Term.cerr, \
|
|
|
'Could not open file <%s> for safe execution.' % fname
|
|
|
return None
|
|
|
|
|
|
kw.setdefault('islog',0)
|
|
|
kw.setdefault('quiet',1)
|
|
|
kw.setdefault('exit_ignore',0)
|
|
|
first = xfile.readline()
|
|
|
loghead = str(self.loghead_tpl).split('\n',1)[0].strip()
|
|
|
xfile.close()
|
|
|
# line by line execution
|
|
|
if first.startswith(loghead) or kw['islog']:
|
|
|
print 'Loading log file <%s> one line at a time...' % fname
|
|
|
if kw['quiet']:
|
|
|
stdout_save = sys.stdout
|
|
|
sys.stdout = StringIO.StringIO()
|
|
|
try:
|
|
|
globs,locs = where[0:2]
|
|
|
except:
|
|
|
try:
|
|
|
globs = locs = where[0]
|
|
|
except:
|
|
|
globs = locs = globals()
|
|
|
badblocks = []
|
|
|
|
|
|
# we also need to identify indented blocks of code when replaying
|
|
|
# logs and put them together before passing them to an exec
|
|
|
# statement. This takes a bit of regexp and look-ahead work in the
|
|
|
# file. It's easiest if we swallow the whole thing in memory
|
|
|
# first, and manually walk through the lines list moving the
|
|
|
# counter ourselves.
|
|
|
indent_re = re.compile('\s+\S')
|
|
|
xfile = open(fname)
|
|
|
filelines = xfile.readlines()
|
|
|
xfile.close()
|
|
|
nlines = len(filelines)
|
|
|
lnum = 0
|
|
|
while lnum < nlines:
|
|
|
line = filelines[lnum]
|
|
|
lnum += 1
|
|
|
# don't re-insert logger status info into cache
|
|
|
if line.startswith('#log#'):
|
|
|
continue
|
|
|
else:
|
|
|
# build a block of code (maybe a single line) for execution
|
|
|
block = line
|
|
|
try:
|
|
|
next = filelines[lnum] # lnum has already incremented
|
|
|
except:
|
|
|
next = None
|
|
|
while next and indent_re.match(next):
|
|
|
block += next
|
|
|
lnum += 1
|
|
|
try:
|
|
|
next = filelines[lnum]
|
|
|
except:
|
|
|
next = None
|
|
|
# now execute the block of one or more lines
|
|
|
try:
|
|
|
exec block in globs,locs
|
|
|
except SystemExit:
|
|
|
pass
|
|
|
except:
|
|
|
badblocks.append(block.rstrip())
|
|
|
if kw['quiet']: # restore stdout
|
|
|
sys.stdout.close()
|
|
|
sys.stdout = stdout_save
|
|
|
print 'Finished replaying log file <%s>' % fname
|
|
|
if badblocks:
|
|
|
print >> sys.stderr, ('\nThe following lines/blocks in file '
|
|
|
'<%s> reported errors:' % fname)
|
|
|
|
|
|
for badline in badblocks:
|
|
|
print >> sys.stderr, badline
|
|
|
else: # regular file execution
|
|
|
try:
|
|
|
execfile(fname,*where)
|
|
|
except SyntaxError:
|
|
|
self.showsyntaxerror()
|
|
|
warn('Failure executing file: <%s>' % fname)
|
|
|
except SystemExit,status:
|
|
|
if not kw['exit_ignore']:
|
|
|
self.showtraceback()
|
|
|
warn('Failure executing file: <%s>' % fname)
|
|
|
except:
|
|
|
self.showtraceback()
|
|
|
warn('Failure executing file: <%s>' % fname)
|
|
|
|
|
|
#************************* end of file <iplib.py> *****************************
|
|
|
|
