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# -*- coding: utf-8 -*-
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"""Main IPython class."""
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#-----------------------------------------------------------------------------
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# Copyright (C) 2001 Janko Hauser <jhauser@zscout.de>
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# Copyright (C) 2001-2007 Fernando Perez. <fperez@colorado.edu>
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# Copyright (C) 2008-2011 The IPython Development Team
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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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from __future__ import absolute_import, print_function
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import __future__
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import abc
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import ast
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import atexit
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import functools
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import os
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import re
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import runpy
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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 subprocess
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import warnings
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from io import open as io_open
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from pickleshare import PickleShareDB
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from traitlets.config.configurable import SingletonConfigurable
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from IPython.core import debugger, oinspect
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from IPython.core import magic
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from IPython.core import page
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from IPython.core import prefilter
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from IPython.core import shadowns
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from IPython.core import ultratb
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from IPython.core.alias import Alias, AliasManager
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from IPython.core.autocall import ExitAutocall
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from IPython.core.builtin_trap import BuiltinTrap
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from IPython.core.events import EventManager, available_events
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from IPython.core.compilerop import CachingCompiler, check_linecache_ipython
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from IPython.core.display_trap import DisplayTrap
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from IPython.core.displayhook import DisplayHook
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from IPython.core.displaypub import DisplayPublisher
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from IPython.core.error import InputRejected, UsageError
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from IPython.core.extensions import ExtensionManager
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from IPython.core.formatters import DisplayFormatter
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from IPython.core.history import HistoryManager
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from IPython.core.inputsplitter import IPythonInputSplitter, ESC_MAGIC, ESC_MAGIC2
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from IPython.core.logger import Logger
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from IPython.core.macro import Macro
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from IPython.core.payload import PayloadManager
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from IPython.core.prefilter import PrefilterManager
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from IPython.core.profiledir import ProfileDir
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from IPython.core.prompts import PromptManager
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from IPython.core.usage import default_banner
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from IPython.testing.skipdoctest import skip_doctest
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from IPython.utils import PyColorize
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from IPython.utils import io
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from IPython.utils import py3compat
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from IPython.utils import openpy
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from IPython.utils.decorators import undoc
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from IPython.utils.io import ask_yes_no
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from IPython.utils.ipstruct import Struct
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from IPython.paths import get_ipython_dir
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from IPython.utils.path import get_home_dir, get_py_filename, unquote_filename, ensure_dir_exists
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from IPython.utils.process import system, getoutput
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from IPython.utils.py3compat import (builtin_mod, unicode_type, string_types,
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with_metaclass, iteritems)
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from IPython.utils.strdispatch import StrDispatch
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from IPython.utils.syspathcontext import prepended_to_syspath
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from IPython.utils.text import (format_screen, LSString, SList,
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DollarFormatter)
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from traitlets import (Integer, Bool, CBool, CaselessStrEnum, Enum,
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List, Dict, Unicode, Instance, Type)
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from IPython.utils.warn import warn, error
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import IPython.core.hooks
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#-----------------------------------------------------------------------------
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# Globals
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#-----------------------------------------------------------------------------
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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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# Utilities
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#-----------------------------------------------------------------------------
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@undoc
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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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@undoc
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def no_op(*a, **kw): pass
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@undoc
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class NoOpContext(object):
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def __enter__(self): pass
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def __exit__(self, type, value, traceback): pass
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no_op_context = NoOpContext()
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class SpaceInInput(Exception): pass
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@undoc
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class Bunch: pass
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def get_default_colors():
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if sys.platform=='darwin':
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return "LightBG"
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elif os.name=='nt':
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return 'Linux'
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else:
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return 'Linux'
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class SeparateUnicode(Unicode):
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r"""A Unicode subclass to validate separate_in, separate_out, etc.
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This is a Unicode based trait that converts '0'->'' and ``'\\n'->'\n'``.
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"""
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def validate(self, obj, value):
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if value == '0': value = ''
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value = value.replace('\\n','\n')
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return super(SeparateUnicode, self).validate(obj, value)
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class ReadlineNoRecord(object):
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"""Context manager to execute some code, then reload readline history
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so that interactive input to the code doesn't appear when pressing up."""
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def __init__(self, shell):
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self.shell = shell
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self._nested_level = 0
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def __enter__(self):
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if self._nested_level == 0:
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try:
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self.orig_length = self.current_length()
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self.readline_tail = self.get_readline_tail()
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except (AttributeError, IndexError): # Can fail with pyreadline
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self.orig_length, self.readline_tail = 999999, []
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self._nested_level += 1
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def __exit__(self, type, value, traceback):
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self._nested_level -= 1
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if self._nested_level == 0:
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# Try clipping the end if it's got longer
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try:
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e = self.current_length() - self.orig_length
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if e > 0:
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for _ in range(e):
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self.shell.readline.remove_history_item(self.orig_length)
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# If it still doesn't match, just reload readline history.
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if self.current_length() != self.orig_length \
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or self.get_readline_tail() != self.readline_tail:
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self.shell.refill_readline_hist()
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except (AttributeError, IndexError):
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pass
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# Returning False will cause exceptions to propagate
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return False
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def current_length(self):
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return self.shell.readline.get_current_history_length()
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def get_readline_tail(self, n=10):
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"""Get the last n items in readline history."""
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end = self.shell.readline.get_current_history_length() + 1
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start = max(end-n, 1)
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ghi = self.shell.readline.get_history_item
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return [ghi(x) for x in range(start, end)]
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@undoc
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class DummyMod(object):
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"""A dummy module used for IPython's interactive module when
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a namespace must be assigned to the module's __dict__."""
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pass
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class ExecutionResult(object):
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"""The result of a call to :meth:`InteractiveShell.run_cell`
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Stores information about what took place.
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"""
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execution_count = None
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error_before_exec = None
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error_in_exec = None
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result = None
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@property
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def success(self):
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return (self.error_before_exec is None) and (self.error_in_exec is None)
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def raise_error(self):
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"""Reraises error if `success` is `False`, otherwise does nothing"""
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if self.error_before_exec is not None:
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raise self.error_before_exec
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if self.error_in_exec is not None:
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raise self.error_in_exec
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class InteractiveShell(SingletonConfigurable):
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"""An enhanced, interactive shell for Python."""
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_instance = None
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ast_transformers = List([], config=True, help=
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"""
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A list of ast.NodeTransformer subclass instances, which will be applied
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to user input before code is run.
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"""
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)
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autocall = Enum((0,1,2), default_value=0, config=True, help=
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"""
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Make IPython automatically call any callable object even if you didn't
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type explicit parentheses. For example, 'str 43' becomes 'str(43)'
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automatically. The value can be '0' to disable the feature, '1' for
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'smart' autocall, where it is not applied if there are no more
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arguments on the line, and '2' for 'full' autocall, where all callable
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objects are automatically called (even if no arguments are present).
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"""
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)
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# TODO: remove all autoindent logic and put into frontends.
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# We can't do this yet because even runlines uses the autoindent.
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autoindent = CBool(True, config=True, help=
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"""
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Autoindent IPython code entered interactively.
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"""
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)
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automagic = CBool(True, config=True, help=
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"""
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Enable magic commands to be called without the leading %.
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"""
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)
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banner1 = Unicode(default_banner, config=True,
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help="""The part of the banner to be printed before the profile"""
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)
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banner2 = Unicode('', config=True,
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help="""The part of the banner to be printed after the profile"""
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)
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cache_size = Integer(1000, config=True, help=
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"""
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Set the size of the output cache. The default is 1000, you can
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change it permanently in your config file. Setting it to 0 completely
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disables the caching system, and the minimum value accepted is 20 (if
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you provide a value less than 20, it is reset to 0 and a warning is
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issued). This limit is defined because otherwise you'll spend more
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time re-flushing a too small cache than working
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"""
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)
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color_info = CBool(True, config=True, help=
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"""
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Use colors for displaying information about objects. Because this
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information is passed through a pager (like 'less'), and some pagers
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get confused with color codes, this capability can be turned off.
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"""
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)
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colors = CaselessStrEnum(('NoColor','LightBG','Linux'),
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default_value=get_default_colors(), config=True,
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help="Set the color scheme (NoColor, Linux, or LightBG)."
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)
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colors_force = CBool(False, help=
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"""
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Force use of ANSI color codes, regardless of OS and readline
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availability.
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"""
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# FIXME: This is essentially a hack to allow ZMQShell to show colors
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# without readline on Win32. When the ZMQ formatting system is
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# refactored, this should be removed.
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)
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debug = CBool(False, config=True)
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deep_reload = CBool(False, config=True, help=
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"""
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**Deprecated**
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Enable deep (recursive) reloading by default. IPython can use the
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deep_reload module which reloads changes in modules recursively (it
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replaces the reload() function, so you don't need to change anything to
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use it). `deep_reload` forces a full reload of modules whose code may
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have changed, which the default reload() function does not. When
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deep_reload is off, IPython will use the normal reload(), but
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deep_reload will still be available as dreload().
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"""
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)
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disable_failing_post_execute = CBool(False, config=True,
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help="Don't call post-execute functions that have failed in the past."
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)
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display_formatter = Instance(DisplayFormatter, allow_none=True)
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displayhook_class = Type(DisplayHook)
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display_pub_class = Type(DisplayPublisher)
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data_pub_class = None
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exit_now = CBool(False)
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exiter = Instance(ExitAutocall)
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def _exiter_default(self):
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return ExitAutocall(self)
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# Monotonically increasing execution counter
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execution_count = Integer(1)
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filename = Unicode("<ipython console>")
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ipython_dir= Unicode('', config=True) # Set to get_ipython_dir() in __init__
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# Input splitter, to transform input line by line and detect when a block
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# is ready to be executed.
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input_splitter = Instance('IPython.core.inputsplitter.IPythonInputSplitter',
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(), {'line_input_checker': True})
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# This InputSplitter instance is used to transform completed cells before
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# running them. It allows cell magics to contain blank lines.
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input_transformer_manager = Instance('IPython.core.inputsplitter.IPythonInputSplitter',
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(), {'line_input_checker': False})
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logstart = CBool(False, config=True, help=
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"""
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Start logging to the default log file in overwrite mode.
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Use `logappend` to specify a log file to **append** logs to.
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"""
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)
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logfile = Unicode('', config=True, help=
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"""
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The name of the logfile to use.
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"""
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)
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logappend = Unicode('', config=True, help=
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"""
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Start logging to the given file in append mode.
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Use `logfile` to specify a log file to **overwrite** logs to.
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"""
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)
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object_info_string_level = Enum((0,1,2), default_value=0,
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config=True)
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pdb = CBool(False, config=True, help=
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"""
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Automatically call the pdb debugger after every exception.
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"""
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)
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multiline_history = CBool(sys.platform != 'win32', config=True,
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help="Save multi-line entries as one entry in readline history"
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)
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display_page = Bool(False, config=True,
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help="""If True, anything that would be passed to the pager
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will be displayed as regular output instead."""
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)
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# deprecated prompt traits:
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prompt_in1 = Unicode('In [\\#]: ', config=True,
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help="Deprecated, use PromptManager.in_template")
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prompt_in2 = Unicode(' .\\D.: ', config=True,
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help="Deprecated, use PromptManager.in2_template")
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prompt_out = Unicode('Out[\\#]: ', config=True,
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help="Deprecated, use PromptManager.out_template")
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prompts_pad_left = CBool(True, config=True,
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help="Deprecated, use PromptManager.justify")
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def _prompt_trait_changed(self, name, old, new):
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table = {
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'prompt_in1' : 'in_template',
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'prompt_in2' : 'in2_template',
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'prompt_out' : 'out_template',
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'prompts_pad_left' : 'justify',
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}
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warn("InteractiveShell.{name} is deprecated, use PromptManager.{newname}".format(
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name=name, newname=table[name])
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)
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# protect against weird cases where self.config may not exist:
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if self.config is not None:
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# propagate to corresponding PromptManager trait
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setattr(self.config.PromptManager, table[name], new)
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_prompt_in1_changed = _prompt_trait_changed
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_prompt_in2_changed = _prompt_trait_changed
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_prompt_out_changed = _prompt_trait_changed
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_prompt_pad_left_changed = _prompt_trait_changed
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show_rewritten_input = CBool(True, config=True,
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help="Show rewritten input, e.g. for autocall."
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)
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quiet = CBool(False, config=True)
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history_length = Integer(10000, config=True)
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history_load_length = Integer(1000, config=True, help=
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"""
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The number of saved history entries to be loaded
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into the readline buffer at startup.
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"""
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)
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# The readline stuff will eventually be moved to the terminal subclass
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# but for now, we can't do that as readline is welded in everywhere.
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readline_use = CBool(True, config=True)
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readline_remove_delims = Unicode('-/~', config=True)
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readline_delims = Unicode() # set by init_readline()
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# don't use \M- bindings by default, because they
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# conflict with 8-bit encodings. See gh-58,gh-88
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readline_parse_and_bind = List([
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'tab: complete',
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'"\C-l": clear-screen',
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'set show-all-if-ambiguous on',
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'"\C-o": tab-insert',
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'"\C-r": reverse-search-history',
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|
'"\C-s": forward-search-history',
|
|
|
'"\C-p": history-search-backward',
|
|
|
'"\C-n": history-search-forward',
|
|
|
'"\e[A": history-search-backward',
|
|
|
'"\e[B": history-search-forward',
|
|
|
'"\C-k": kill-line',
|
|
|
'"\C-u": unix-line-discard',
|
|
|
], config=True)
|
|
|
|
|
|
_custom_readline_config = False
|
|
|
|
|
|
def _readline_parse_and_bind_changed(self, name, old, new):
|
|
|
# notice that readline config is customized
|
|
|
# indicates that it should have higher priority than inputrc
|
|
|
self._custom_readline_config = True
|
|
|
|
|
|
ast_node_interactivity = Enum(['all', 'last', 'last_expr', 'none'],
|
|
|
default_value='last_expr', config=True,
|
|
|
help="""
|
|
|
'all', 'last', 'last_expr' or 'none', specifying which nodes should be
|
|
|
run interactively (displaying output from expressions).""")
|
|
|
|
|
|
# TODO: this part of prompt management should be moved to the frontends.
|
|
|
# Use custom TraitTypes that convert '0'->'' and '\\n'->'\n'
|
|
|
separate_in = SeparateUnicode('\n', config=True)
|
|
|
separate_out = SeparateUnicode('', config=True)
|
|
|
separate_out2 = SeparateUnicode('', config=True)
|
|
|
wildcards_case_sensitive = CBool(True, config=True)
|
|
|
xmode = CaselessStrEnum(('Context','Plain', 'Verbose'),
|
|
|
default_value='Context', config=True)
|
|
|
|
|
|
# Subcomponents of InteractiveShell
|
|
|
alias_manager = Instance('IPython.core.alias.AliasManager', allow_none=True)
|
|
|
prefilter_manager = Instance('IPython.core.prefilter.PrefilterManager', allow_none=True)
|
|
|
builtin_trap = Instance('IPython.core.builtin_trap.BuiltinTrap', allow_none=True)
|
|
|
display_trap = Instance('IPython.core.display_trap.DisplayTrap', allow_none=True)
|
|
|
extension_manager = Instance('IPython.core.extensions.ExtensionManager', allow_none=True)
|
|
|
payload_manager = Instance('IPython.core.payload.PayloadManager', allow_none=True)
|
|
|
history_manager = Instance('IPython.core.history.HistoryAccessorBase', allow_none=True)
|
|
|
magics_manager = Instance('IPython.core.magic.MagicsManager', allow_none=True)
|
|
|
|
|
|
profile_dir = Instance('IPython.core.application.ProfileDir', allow_none=True)
|
|
|
@property
|
|
|
def profile(self):
|
|
|
if self.profile_dir is not None:
|
|
|
name = os.path.basename(self.profile_dir.location)
|
|
|
return name.replace('profile_','')
|
|
|
|
|
|
|
|
|
# Private interface
|
|
|
_post_execute = Dict()
|
|
|
|
|
|
# Tracks any GUI loop loaded for pylab
|
|
|
pylab_gui_select = None
|
|
|
|
|
|
def __init__(self, ipython_dir=None, profile_dir=None,
|
|
|
user_module=None, user_ns=None,
|
|
|
custom_exceptions=((), None), **kwargs):
|
|
|
|
|
|
# This is where traits with a config_key argument are updated
|
|
|
# from the values on config.
|
|
|
super(InteractiveShell, self).__init__(**kwargs)
|
|
|
self.configurables = [self]
|
|
|
|
|
|
# These are relatively independent and stateless
|
|
|
self.init_ipython_dir(ipython_dir)
|
|
|
self.init_profile_dir(profile_dir)
|
|
|
self.init_instance_attrs()
|
|
|
self.init_environment()
|
|
|
|
|
|
# Check if we're in a virtualenv, and set up sys.path.
|
|
|
self.init_virtualenv()
|
|
|
|
|
|
# Create namespaces (user_ns, user_global_ns, etc.)
|
|
|
self.init_create_namespaces(user_module, user_ns)
|
|
|
# This has to be done after init_create_namespaces because it uses
|
|
|
# something in self.user_ns, but before init_sys_modules, which
|
|
|
# is the first thing to modify sys.
|
|
|
# TODO: When we override sys.stdout and sys.stderr before this class
|
|
|
# is created, we are saving the overridden ones here. Not sure if this
|
|
|
# is what we want to do.
|
|
|
self.save_sys_module_state()
|
|
|
self.init_sys_modules()
|
|
|
|
|
|
# While we're trying to have each part of the code directly access what
|
|
|
# it needs without keeping redundant references to objects, we have too
|
|
|
# much legacy code that expects ip.db to exist.
|
|
|
self.db = PickleShareDB(os.path.join(self.profile_dir.location, 'db'))
|
|
|
|
|
|
self.init_history()
|
|
|
self.init_encoding()
|
|
|
self.init_prefilter()
|
|
|
|
|
|
self.init_syntax_highlighting()
|
|
|
self.init_hooks()
|
|
|
self.init_events()
|
|
|
self.init_pushd_popd_magic()
|
|
|
# self.init_traceback_handlers use to be here, but we moved it below
|
|
|
# because it and init_io have to come after init_readline.
|
|
|
self.init_user_ns()
|
|
|
self.init_logger()
|
|
|
self.init_builtins()
|
|
|
|
|
|
# The following was in post_config_initialization
|
|
|
self.init_inspector()
|
|
|
# init_readline() must come before init_io(), because init_io uses
|
|
|
# readline related things.
|
|
|
self.init_readline()
|
|
|
# We save this here in case user code replaces raw_input, but it needs
|
|
|
# to be after init_readline(), because PyPy's readline works by replacing
|
|
|
# raw_input.
|
|
|
if py3compat.PY3:
|
|
|
self.raw_input_original = input
|
|
|
else:
|
|
|
self.raw_input_original = raw_input
|
|
|
# init_completer must come after init_readline, because it needs to
|
|
|
# know whether readline is present or not system-wide to configure the
|
|
|
# completers, since the completion machinery can now operate
|
|
|
# independently of readline (e.g. over the network)
|
|
|
self.init_completer()
|
|
|
# TODO: init_io() needs to happen before init_traceback handlers
|
|
|
# because the traceback handlers hardcode the stdout/stderr streams.
|
|
|
# This logic in in debugger.Pdb and should eventually be changed.
|
|
|
self.init_io()
|
|
|
self.init_traceback_handlers(custom_exceptions)
|
|
|
self.init_prompts()
|
|
|
self.init_display_formatter()
|
|
|
self.init_display_pub()
|
|
|
self.init_data_pub()
|
|
|
self.init_displayhook()
|
|
|
self.init_magics()
|
|
|
self.init_alias()
|
|
|
self.init_logstart()
|
|
|
self.init_pdb()
|
|
|
self.init_extension_manager()
|
|
|
self.init_payload()
|
|
|
self.init_deprecation_warnings()
|
|
|
self.hooks.late_startup_hook()
|
|
|
self.events.trigger('shell_initialized', self)
|
|
|
atexit.register(self.atexit_operations)
|
|
|
|
|
|
def get_ipython(self):
|
|
|
"""Return the currently running IPython instance."""
|
|
|
return self
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Trait changed handlers
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def _ipython_dir_changed(self, name, new):
|
|
|
ensure_dir_exists(new)
|
|
|
|
|
|
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 value != 0 and 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
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# init_* methods called by __init__
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def init_ipython_dir(self, ipython_dir):
|
|
|
if ipython_dir is not None:
|
|
|
self.ipython_dir = ipython_dir
|
|
|
return
|
|
|
|
|
|
self.ipython_dir = get_ipython_dir()
|
|
|
|
|
|
def init_profile_dir(self, profile_dir):
|
|
|
if profile_dir is not None:
|
|
|
self.profile_dir = profile_dir
|
|
|
return
|
|
|
self.profile_dir =\
|
|
|
ProfileDir.create_profile_dir_by_name(self.ipython_dir, 'default')
|
|
|
|
|
|
def init_instance_attrs(self):
|
|
|
self.more = False
|
|
|
|
|
|
# command compiler
|
|
|
self.compile = CachingCompiler()
|
|
|
|
|
|
# Make an empty namespace, which extension writers can rely on both
|
|
|
# existing and NEVER being used by ipython itself. This gives them a
|
|
|
# convenient location for storing additional information and state
|
|
|
# their extensions may require, without fear of collisions with other
|
|
|
# ipython names that may develop later.
|
|
|
self.meta = Struct()
|
|
|
|
|
|
# Temporary files used for various purposes. Deleted at exit.
|
|
|
self.tempfiles = []
|
|
|
self.tempdirs = []
|
|
|
|
|
|
# Keep track of readline usage (later set by init_readline)
|
|
|
self.has_readline = False
|
|
|
|
|
|
# keep track of where we started running (mainly for crash post-mortem)
|
|
|
# This is not being used anywhere currently.
|
|
|
self.starting_dir = py3compat.getcwd()
|
|
|
|
|
|
# Indentation management
|
|
|
self.indent_current_nsp = 0
|
|
|
|
|
|
# Dict to track post-execution functions that have been registered
|
|
|
self._post_execute = {}
|
|
|
|
|
|
def init_environment(self):
|
|
|
"""Any changes we need to make to the user's environment."""
|
|
|
pass
|
|
|
|
|
|
def init_encoding(self):
|
|
|
# Get system encoding at startup time. Certain terminals (like Emacs
|
|
|
# under Win32 have it set to None, and we need to have a known valid
|
|
|
# encoding to use in the raw_input() method
|
|
|
try:
|
|
|
self.stdin_encoding = sys.stdin.encoding or 'ascii'
|
|
|
except AttributeError:
|
|
|
self.stdin_encoding = 'ascii'
|
|
|
|
|
|
def init_syntax_highlighting(self):
|
|
|
# Python source parser/formatter for syntax highlighting
|
|
|
pyformat = PyColorize.Parser().format
|
|
|
self.pycolorize = lambda src: pyformat(src,'str',self.colors)
|
|
|
|
|
|
def init_pushd_popd_magic(self):
|
|
|
# for pushd/popd management
|
|
|
self.home_dir = get_home_dir()
|
|
|
|
|
|
self.dir_stack = []
|
|
|
|
|
|
def init_logger(self):
|
|
|
self.logger = Logger(self.home_dir, logfname='ipython_log.py',
|
|
|
logmode='rotate')
|
|
|
|
|
|
def init_logstart(self):
|
|
|
"""Initialize logging in case it was requested at the command line.
|
|
|
"""
|
|
|
if self.logappend:
|
|
|
self.magic('logstart %s append' % self.logappend)
|
|
|
elif self.logfile:
|
|
|
self.magic('logstart %s' % self.logfile)
|
|
|
elif self.logstart:
|
|
|
self.magic('logstart')
|
|
|
|
|
|
def init_deprecation_warnings(self):
|
|
|
"""
|
|
|
register default filter for deprecation warning.
|
|
|
|
|
|
This will allow deprecation warning of function used interactively to show
|
|
|
warning to users, and still hide deprecation warning from libraries import.
|
|
|
"""
|
|
|
warnings.filterwarnings("default", category=DeprecationWarning, module=self.user_ns.get("__name__"))
|
|
|
|
|
|
def init_builtins(self):
|
|
|
# A single, static flag that we set to True. Its presence indicates
|
|
|
# that an IPython shell has been created, and we make no attempts at
|
|
|
# removing on exit or representing the existence of more than one
|
|
|
# IPython at a time.
|
|
|
builtin_mod.__dict__['__IPYTHON__'] = True
|
|
|
|
|
|
# In 0.11 we introduced '__IPYTHON__active' as an integer we'd try to
|
|
|
# manage on enter/exit, but with all our shells it's virtually
|
|
|
# impossible to get all the cases right. We're leaving the name in for
|
|
|
# those who adapted their codes to check for this flag, but will
|
|
|
# eventually remove it after a few more releases.
|
|
|
builtin_mod.__dict__['__IPYTHON__active'] = \
|
|
|
'Deprecated, check for __IPYTHON__'
|
|
|
|
|
|
self.builtin_trap = BuiltinTrap(shell=self)
|
|
|
|
|
|
def init_inspector(self):
|
|
|
# Object inspector
|
|
|
self.inspector = oinspect.Inspector(oinspect.InspectColors,
|
|
|
PyColorize.ANSICodeColors,
|
|
|
'NoColor',
|
|
|
self.object_info_string_level)
|
|
|
|
|
|
def init_io(self):
|
|
|
# This will just use sys.stdout and sys.stderr. If you want to
|
|
|
# override sys.stdout and sys.stderr themselves, you need to do that
|
|
|
# *before* instantiating this class, because io holds onto
|
|
|
# references to the underlying streams.
|
|
|
if (sys.platform == 'win32' or sys.platform == 'cli') and self.has_readline:
|
|
|
io.stdout = io.stderr = io.IOStream(self.readline._outputfile)
|
|
|
else:
|
|
|
io.stdout = io.IOStream(sys.stdout)
|
|
|
io.stderr = io.IOStream(sys.stderr)
|
|
|
|
|
|
def init_prompts(self):
|
|
|
self.prompt_manager = PromptManager(shell=self, parent=self)
|
|
|
self.configurables.append(self.prompt_manager)
|
|
|
# Set system prompts, so that scripts can decide if they are running
|
|
|
# interactively.
|
|
|
sys.ps1 = 'In : '
|
|
|
sys.ps2 = '...: '
|
|
|
sys.ps3 = 'Out: '
|
|
|
|
|
|
def init_display_formatter(self):
|
|
|
self.display_formatter = DisplayFormatter(parent=self)
|
|
|
self.configurables.append(self.display_formatter)
|
|
|
|
|
|
def init_display_pub(self):
|
|
|
self.display_pub = self.display_pub_class(parent=self)
|
|
|
self.configurables.append(self.display_pub)
|
|
|
|
|
|
def init_data_pub(self):
|
|
|
if not self.data_pub_class:
|
|
|
self.data_pub = None
|
|
|
return
|
|
|
self.data_pub = self.data_pub_class(parent=self)
|
|
|
self.configurables.append(self.data_pub)
|
|
|
|
|
|
def init_displayhook(self):
|
|
|
# Initialize displayhook, set in/out prompts and printing system
|
|
|
self.displayhook = self.displayhook_class(
|
|
|
parent=self,
|
|
|
shell=self,
|
|
|
cache_size=self.cache_size,
|
|
|
)
|
|
|
self.configurables.append(self.displayhook)
|
|
|
# This is a context manager that installs/revmoes the displayhook at
|
|
|
# the appropriate time.
|
|
|
self.display_trap = DisplayTrap(hook=self.displayhook)
|
|
|
|
|
|
def init_virtualenv(self):
|
|
|
"""Add a virtualenv to sys.path so the user can import modules from it.
|
|
|
This isn't perfect: it doesn't use the Python interpreter with which the
|
|
|
virtualenv was built, and it ignores the --no-site-packages option. A
|
|
|
warning will appear suggesting the user installs IPython in the
|
|
|
virtualenv, but for many cases, it probably works well enough.
|
|
|
|
|
|
Adapted from code snippets online.
|
|
|
|
|
|
http://blog.ufsoft.org/2009/1/29/ipython-and-virtualenv
|
|
|
"""
|
|
|
if 'VIRTUAL_ENV' not in os.environ:
|
|
|
# Not in a virtualenv
|
|
|
return
|
|
|
|
|
|
# venv detection:
|
|
|
# stdlib venv may symlink sys.executable, so we can't use realpath.
|
|
|
# but others can symlink *to* the venv Python, so we can't just use sys.executable.
|
|
|
# So we just check every item in the symlink tree (generally <= 3)
|
|
|
p = os.path.normcase(sys.executable)
|
|
|
paths = [p]
|
|
|
while os.path.islink(p):
|
|
|
p = os.path.normcase(os.path.join(os.path.dirname(p), os.readlink(p)))
|
|
|
paths.append(p)
|
|
|
p_venv = os.path.normcase(os.environ['VIRTUAL_ENV'])
|
|
|
if any(p.startswith(p_venv) for p in paths):
|
|
|
# Running properly in the virtualenv, don't need to do anything
|
|
|
return
|
|
|
|
|
|
warn("Attempting to work in a virtualenv. If you encounter problems, please "
|
|
|
"install IPython inside the virtualenv.")
|
|
|
if sys.platform == "win32":
|
|
|
virtual_env = os.path.join(os.environ['VIRTUAL_ENV'], 'Lib', 'site-packages')
|
|
|
else:
|
|
|
virtual_env = os.path.join(os.environ['VIRTUAL_ENV'], 'lib',
|
|
|
'python%d.%d' % sys.version_info[:2], 'site-packages')
|
|
|
|
|
|
import site
|
|
|
sys.path.insert(0, virtual_env)
|
|
|
site.addsitedir(virtual_env)
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to injections into the sys module
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def save_sys_module_state(self):
|
|
|
"""Save the state of hooks in the sys module.
|
|
|
|
|
|
This has to be called after self.user_module is created.
|
|
|
"""
|
|
|
self._orig_sys_module_state = {}
|
|
|
self._orig_sys_module_state['stdin'] = sys.stdin
|
|
|
self._orig_sys_module_state['stdout'] = sys.stdout
|
|
|
self._orig_sys_module_state['stderr'] = sys.stderr
|
|
|
self._orig_sys_module_state['excepthook'] = sys.excepthook
|
|
|
self._orig_sys_modules_main_name = self.user_module.__name__
|
|
|
self._orig_sys_modules_main_mod = sys.modules.get(self.user_module.__name__)
|
|
|
|
|
|
def restore_sys_module_state(self):
|
|
|
"""Restore the state of the sys module."""
|
|
|
try:
|
|
|
for k, v in iteritems(self._orig_sys_module_state):
|
|
|
setattr(sys, k, v)
|
|
|
except AttributeError:
|
|
|
pass
|
|
|
# Reset what what done in self.init_sys_modules
|
|
|
if self._orig_sys_modules_main_mod is not None:
|
|
|
sys.modules[self._orig_sys_modules_main_name] = self._orig_sys_modules_main_mod
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to the banner
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
@property
|
|
|
def banner(self):
|
|
|
banner = self.banner1
|
|
|
if self.profile and self.profile != 'default':
|
|
|
banner += '\nIPython profile: %s\n' % self.profile
|
|
|
if self.banner2:
|
|
|
banner += '\n' + self.banner2
|
|
|
return banner
|
|
|
|
|
|
def show_banner(self, banner=None):
|
|
|
if banner is None:
|
|
|
banner = self.banner
|
|
|
self.write(banner)
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to hooks
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def init_hooks(self):
|
|
|
# hooks holds pointers used for user-side customizations
|
|
|
self.hooks = Struct()
|
|
|
|
|
|
self.strdispatchers = {}
|
|
|
|
|
|
# Set all default hooks, defined in the IPython.hooks module.
|
|
|
hooks = IPython.core.hooks
|
|
|
for hook_name in hooks.__all__:
|
|
|
# default hooks have priority 100, i.e. low; user hooks should have
|
|
|
# 0-100 priority
|
|
|
self.set_hook(hook_name,getattr(hooks,hook_name), 100, _warn_deprecated=False)
|
|
|
|
|
|
if self.display_page:
|
|
|
self.set_hook('show_in_pager', page.as_hook(page.display_page), 90)
|
|
|
|
|
|
def set_hook(self,name,hook, priority=50, str_key=None, re_key=None,
|
|
|
_warn_deprecated=True):
|
|
|
"""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.
|
|
|
|
|
|
f = types.MethodType(hook,self)
|
|
|
|
|
|
# check if the hook is for strdispatcher first
|
|
|
if str_key is not None:
|
|
|
sdp = self.strdispatchers.get(name, StrDispatch())
|
|
|
sdp.add_s(str_key, f, priority )
|
|
|
self.strdispatchers[name] = sdp
|
|
|
return
|
|
|
if re_key is not None:
|
|
|
sdp = self.strdispatchers.get(name, StrDispatch())
|
|
|
sdp.add_re(re.compile(re_key), f, priority )
|
|
|
self.strdispatchers[name] = sdp
|
|
|
return
|
|
|
|
|
|
dp = getattr(self.hooks, name, None)
|
|
|
if name not in IPython.core.hooks.__all__:
|
|
|
print("Warning! Hook '%s' is not one of %s" % \
|
|
|
(name, IPython.core.hooks.__all__ ))
|
|
|
|
|
|
if _warn_deprecated and (name in IPython.core.hooks.deprecated):
|
|
|
alternative = IPython.core.hooks.deprecated[name]
|
|
|
warn("Hook {} is deprecated. Use {} instead.".format(name, alternative))
|
|
|
|
|
|
if not dp:
|
|
|
dp = IPython.core.hooks.CommandChainDispatcher()
|
|
|
|
|
|
try:
|
|
|
dp.add(f,priority)
|
|
|
except AttributeError:
|
|
|
# it was not commandchain, plain old func - replace
|
|
|
dp = f
|
|
|
|
|
|
setattr(self.hooks,name, dp)
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to events
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def init_events(self):
|
|
|
self.events = EventManager(self, available_events)
|
|
|
|
|
|
self.events.register("pre_execute", self._clear_warning_registry)
|
|
|
|
|
|
def register_post_execute(self, func):
|
|
|
"""DEPRECATED: Use ip.events.register('post_run_cell', func)
|
|
|
|
|
|
Register a function for calling after code execution.
|
|
|
"""
|
|
|
warn("ip.register_post_execute is deprecated, use "
|
|
|
"ip.events.register('post_run_cell', func) instead.")
|
|
|
self.events.register('post_run_cell', func)
|
|
|
|
|
|
def _clear_warning_registry(self):
|
|
|
# clear the warning registry, so that different code blocks with
|
|
|
# overlapping line number ranges don't cause spurious suppression of
|
|
|
# warnings (see gh-6611 for details)
|
|
|
if "__warningregistry__" in self.user_global_ns:
|
|
|
del self.user_global_ns["__warningregistry__"]
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to the "main" module
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def new_main_mod(self, filename, modname):
|
|
|
"""Return a new 'main' module object for user code execution.
|
|
|
|
|
|
``filename`` should be the path of the script which will be run in the
|
|
|
module. Requests with the same filename will get the same module, with
|
|
|
its namespace cleared.
|
|
|
|
|
|
``modname`` should be the module name - normally either '__main__' or
|
|
|
the basename of the file without the extension.
|
|
|
|
|
|
When scripts are executed via %run, we must keep a reference to their
|
|
|
__main__ module around so that Python doesn't
|
|
|
clear it, rendering references to module globals useless.
|
|
|
|
|
|
This method keeps said reference in a private dict, keyed by the
|
|
|
absolute path of the script. This way, for multiple executions of the
|
|
|
same script we only keep one copy of the namespace (the last one),
|
|
|
thus preventing memory leaks from old references while allowing the
|
|
|
objects from the last execution to be accessible.
|
|
|
"""
|
|
|
filename = os.path.abspath(filename)
|
|
|
try:
|
|
|
main_mod = self._main_mod_cache[filename]
|
|
|
except KeyError:
|
|
|
main_mod = self._main_mod_cache[filename] = types.ModuleType(
|
|
|
py3compat.cast_bytes_py2(modname),
|
|
|
doc="Module created for script run in IPython")
|
|
|
else:
|
|
|
main_mod.__dict__.clear()
|
|
|
main_mod.__name__ = modname
|
|
|
|
|
|
main_mod.__file__ = filename
|
|
|
# It seems pydoc (and perhaps others) needs any module instance to
|
|
|
# implement a __nonzero__ method
|
|
|
main_mod.__nonzero__ = lambda : True
|
|
|
|
|
|
return main_mod
|
|
|
|
|
|
def clear_main_mod_cache(self):
|
|
|
"""Clear the cache of main modules.
|
|
|
|
|
|
Mainly for use by utilities like %reset.
|
|
|
|
|
|
Examples
|
|
|
--------
|
|
|
|
|
|
In [15]: import IPython
|
|
|
|
|
|
In [16]: m = _ip.new_main_mod(IPython.__file__, 'IPython')
|
|
|
|
|
|
In [17]: len(_ip._main_mod_cache) > 0
|
|
|
Out[17]: True
|
|
|
|
|
|
In [18]: _ip.clear_main_mod_cache()
|
|
|
|
|
|
In [19]: len(_ip._main_mod_cache) == 0
|
|
|
Out[19]: True
|
|
|
"""
|
|
|
self._main_mod_cache.clear()
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to debugging
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def init_pdb(self):
|
|
|
# Set calling of pdb on exceptions
|
|
|
# self.call_pdb is a property
|
|
|
self.call_pdb = self.pdb
|
|
|
|
|
|
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
|
|
|
|
|
|
call_pdb = property(_get_call_pdb,_set_call_pdb,None,
|
|
|
'Control auto-activation of pdb at exceptions')
|
|
|
|
|
|
def debugger(self,force=False):
|
|
|
"""Call the pydb/pdb debugger.
|
|
|
|
|
|
Keywords:
|
|
|
|
|
|
- force(False): by default, this routine checks the instance call_pdb
|
|
|
flag and does not actually invoke the debugger if the flag is false.
|
|
|
The 'force' option forces the debugger to activate even if the flag
|
|
|
is false.
|
|
|
"""
|
|
|
|
|
|
if not (force or self.call_pdb):
|
|
|
return
|
|
|
|
|
|
if not hasattr(sys,'last_traceback'):
|
|
|
error('No traceback has been produced, nothing to debug.')
|
|
|
return
|
|
|
|
|
|
# use pydb if available
|
|
|
if debugger.has_pydb:
|
|
|
from pydb import pm
|
|
|
else:
|
|
|
# fallback to our internal debugger
|
|
|
pm = lambda : self.InteractiveTB.debugger(force=True)
|
|
|
|
|
|
with self.readline_no_record:
|
|
|
pm()
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to IPython's various namespaces
|
|
|
#-------------------------------------------------------------------------
|
|
|
default_user_namespaces = True
|
|
|
|
|
|
def init_create_namespaces(self, user_module=None, user_ns=None):
|
|
|
# Create the namespace where the user will operate. user_ns is
|
|
|
# normally the only one used, and it is passed to the exec calls as
|
|
|
# the locals argument. But we do carry a user_global_ns namespace
|
|
|
# given as the exec 'globals' argument, This is useful in embedding
|
|
|
# situations where the ipython shell opens in a context where the
|
|
|
# distinction between locals and globals is meaningful. For
|
|
|
# non-embedded contexts, it is just the same object as the user_ns dict.
|
|
|
|
|
|
# FIXME. For some strange reason, __builtins__ is showing up at user
|
|
|
# level as a dict instead of a module. This is a manual fix, but I
|
|
|
# should really track down where the problem is coming from. Alex
|
|
|
# Schmolck reported this problem first.
|
|
|
|
|
|
# A useful post by Alex Martelli on this topic:
|
|
|
# Re: inconsistent value from __builtins__
|
|
|
# Von: Alex Martelli <aleaxit@yahoo.com>
|
|
|
# Datum: Freitag 01 Oktober 2004 04:45:34 nachmittags/abends
|
|
|
# Gruppen: comp.lang.python
|
|
|
|
|
|
# Michael Hohn <hohn@hooknose.lbl.gov> wrote:
|
|
|
# > >>> print type(builtin_check.get_global_binding('__builtins__'))
|
|
|
# > <type 'dict'>
|
|
|
# > >>> print type(__builtins__)
|
|
|
# > <type 'module'>
|
|
|
# > Is this difference in return value intentional?
|
|
|
|
|
|
# Well, it's documented that '__builtins__' can be either a dictionary
|
|
|
# or a module, and it's been that way for a long time. Whether it's
|
|
|
# intentional (or sensible), I don't know. In any case, the idea is
|
|
|
# that if you need to access the built-in namespace directly, you
|
|
|
# should start with "import __builtin__" (note, no 's') which will
|
|
|
# definitely give you a module. Yeah, it's somewhat confusing:-(.
|
|
|
|
|
|
# These routines return a properly built module and dict as needed by
|
|
|
# the rest of the code, and can also be used by extension writers to
|
|
|
# generate properly initialized namespaces.
|
|
|
if (user_ns is not None) or (user_module is not None):
|
|
|
self.default_user_namespaces = False
|
|
|
self.user_module, self.user_ns = self.prepare_user_module(user_module, user_ns)
|
|
|
|
|
|
# A record of hidden variables we have added to the user namespace, so
|
|
|
# we can list later only variables defined in actual interactive use.
|
|
|
self.user_ns_hidden = {}
|
|
|
|
|
|
# Now that FakeModule produces a real module, we've run into a nasty
|
|
|
# problem: after script execution (via %run), the module where the user
|
|
|
# code ran is deleted. Now that this object is a true module (needed
|
|
|
# so docetst and other tools work correctly), the Python module
|
|
|
# teardown mechanism runs over it, and sets to None every variable
|
|
|
# present in that module. Top-level references to objects from the
|
|
|
# script survive, because the user_ns is updated with them. However,
|
|
|
# calling functions defined in the script that use other things from
|
|
|
# the script will fail, because the function's closure had references
|
|
|
# to the original objects, which are now all None. So we must protect
|
|
|
# these modules from deletion by keeping a cache.
|
|
|
#
|
|
|
# To avoid keeping stale modules around (we only need the one from the
|
|
|
# last run), we use a dict keyed with the full path to the script, so
|
|
|
# only the last version of the module is held in the cache. Note,
|
|
|
# however, that we must cache the module *namespace contents* (their
|
|
|
# __dict__). Because if we try to cache the actual modules, old ones
|
|
|
# (uncached) could be destroyed while still holding references (such as
|
|
|
# those held by GUI objects that tend to be long-lived)>
|
|
|
#
|
|
|
# The %reset command will flush this cache. See the cache_main_mod()
|
|
|
# and clear_main_mod_cache() methods for details on use.
|
|
|
|
|
|
# This is the cache used for 'main' namespaces
|
|
|
self._main_mod_cache = {}
|
|
|
|
|
|
# A table holding all the namespaces IPython deals with, so that
|
|
|
# introspection facilities can search easily.
|
|
|
self.ns_table = {'user_global':self.user_module.__dict__,
|
|
|
'user_local':self.user_ns,
|
|
|
'builtin':builtin_mod.__dict__
|
|
|
}
|
|
|
|
|
|
@property
|
|
|
def user_global_ns(self):
|
|
|
return self.user_module.__dict__
|
|
|
|
|
|
def prepare_user_module(self, user_module=None, user_ns=None):
|
|
|
"""Prepare the module and namespace in which user code will be run.
|
|
|
|
|
|
When IPython is started normally, both parameters are None: a new module
|
|
|
is created automatically, and its __dict__ used as the namespace.
|
|
|
|
|
|
If only user_module is provided, its __dict__ is used as the namespace.
|
|
|
If only user_ns is provided, a dummy module is created, and user_ns
|
|
|
becomes the global namespace. If both are provided (as they may be
|
|
|
when embedding), user_ns is the local namespace, and user_module
|
|
|
provides the global namespace.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
user_module : module, optional
|
|
|
The current user module in which IPython is being run. If None,
|
|
|
a clean module will be created.
|
|
|
user_ns : dict, optional
|
|
|
A namespace in which to run interactive commands.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
A tuple of user_module and user_ns, each properly initialised.
|
|
|
"""
|
|
|
if user_module is None and user_ns is not None:
|
|
|
user_ns.setdefault("__name__", "__main__")
|
|
|
user_module = DummyMod()
|
|
|
user_module.__dict__ = user_ns
|
|
|
|
|
|
if user_module is None:
|
|
|
user_module = types.ModuleType("__main__",
|
|
|
doc="Automatically created module for IPython interactive environment")
|
|
|
|
|
|
# We must ensure that __builtin__ (without the final 's') is always
|
|
|
# available and pointing to the __builtin__ *module*. For more details:
|
|
|
# http://mail.python.org/pipermail/python-dev/2001-April/014068.html
|
|
|
user_module.__dict__.setdefault('__builtin__', builtin_mod)
|
|
|
user_module.__dict__.setdefault('__builtins__', builtin_mod)
|
|
|
|
|
|
if user_ns is None:
|
|
|
user_ns = user_module.__dict__
|
|
|
|
|
|
return user_module, user_ns
|
|
|
|
|
|
def init_sys_modules(self):
|
|
|
# We need to insert into sys.modules something that looks like a
|
|
|
# module but which accesses the IPython namespace, for shelve and
|
|
|
# pickle to work interactively. Normally they rely on getting
|
|
|
# everything out of __main__, but for embedding purposes each IPython
|
|
|
# instance has its own private namespace, so we can't go shoving
|
|
|
# everything into __main__.
|
|
|
|
|
|
# note, however, that we should only do this for non-embedded
|
|
|
# ipythons, which really mimic the __main__.__dict__ with their own
|
|
|
# namespace. Embedded instances, on the other hand, should not do
|
|
|
# this because they need to manage the user local/global namespaces
|
|
|
# only, but they live within a 'normal' __main__ (meaning, they
|
|
|
# shouldn't overtake the execution environment of the script they're
|
|
|
# embedded in).
|
|
|
|
|
|
# This is overridden in the InteractiveShellEmbed subclass to a no-op.
|
|
|
main_name = self.user_module.__name__
|
|
|
sys.modules[main_name] = self.user_module
|
|
|
|
|
|
def init_user_ns(self):
|
|
|
"""Initialize all user-visible namespaces to their minimum defaults.
|
|
|
|
|
|
Certain history lists are also initialized here, as they effectively
|
|
|
act as user namespaces.
|
|
|
|
|
|
Notes
|
|
|
-----
|
|
|
All data structures here are only filled in, they are NOT reset by this
|
|
|
method. If they were not empty before, data will simply be added to
|
|
|
therm.
|
|
|
"""
|
|
|
# This function works in two parts: first we put a few things in
|
|
|
# user_ns, and we sync that contents into user_ns_hidden so that these
|
|
|
# initial variables aren't shown by %who. After the sync, we add the
|
|
|
# rest of what we *do* want the user to see with %who even on a new
|
|
|
# session (probably nothing, so theye really only see their own stuff)
|
|
|
|
|
|
# The user dict must *always* have a __builtin__ reference to the
|
|
|
# Python standard __builtin__ namespace, which must be imported.
|
|
|
# This is so that certain operations in prompt evaluation can be
|
|
|
# reliably executed with builtins. Note that we can NOT use
|
|
|
# __builtins__ (note the 's'), because that can either be a dict or a
|
|
|
# module, and can even mutate at runtime, depending on the context
|
|
|
# (Python makes no guarantees on it). In contrast, __builtin__ is
|
|
|
# always a module object, though it must be explicitly imported.
|
|
|
|
|
|
# For more details:
|
|
|
# http://mail.python.org/pipermail/python-dev/2001-April/014068.html
|
|
|
ns = dict()
|
|
|
|
|
|
# make global variables for user access to the histories
|
|
|
ns['_ih'] = self.history_manager.input_hist_parsed
|
|
|
ns['_oh'] = self.history_manager.output_hist
|
|
|
ns['_dh'] = self.history_manager.dir_hist
|
|
|
|
|
|
ns['_sh'] = shadowns
|
|
|
|
|
|
# user aliases to input and output histories. These shouldn't show up
|
|
|
# in %who, as they can have very large reprs.
|
|
|
ns['In'] = self.history_manager.input_hist_parsed
|
|
|
ns['Out'] = self.history_manager.output_hist
|
|
|
|
|
|
# Store myself as the public api!!!
|
|
|
ns['get_ipython'] = self.get_ipython
|
|
|
|
|
|
ns['exit'] = self.exiter
|
|
|
ns['quit'] = self.exiter
|
|
|
|
|
|
# Sync what we've added so far to user_ns_hidden so these aren't seen
|
|
|
# by %who
|
|
|
self.user_ns_hidden.update(ns)
|
|
|
|
|
|
# Anything put into ns now would show up in %who. Think twice before
|
|
|
# putting anything here, as we really want %who to show the user their
|
|
|
# stuff, not our variables.
|
|
|
|
|
|
# Finally, update the real user's namespace
|
|
|
self.user_ns.update(ns)
|
|
|
|
|
|
@property
|
|
|
def all_ns_refs(self):
|
|
|
"""Get a list of references to all the namespace dictionaries in which
|
|
|
IPython might store a user-created object.
|
|
|
|
|
|
Note that this does not include the displayhook, which also caches
|
|
|
objects from the output."""
|
|
|
return [self.user_ns, self.user_global_ns, self.user_ns_hidden] + \
|
|
|
[m.__dict__ for m in self._main_mod_cache.values()]
|
|
|
|
|
|
def reset(self, new_session=True):
|
|
|
"""Clear all internal namespaces, and attempt to release references to
|
|
|
user objects.
|
|
|
|
|
|
If new_session is True, a new history session will be opened.
|
|
|
"""
|
|
|
# Clear histories
|
|
|
self.history_manager.reset(new_session)
|
|
|
# Reset counter used to index all histories
|
|
|
if new_session:
|
|
|
self.execution_count = 1
|
|
|
|
|
|
# Flush cached output items
|
|
|
if self.displayhook.do_full_cache:
|
|
|
self.displayhook.flush()
|
|
|
|
|
|
# The main execution namespaces must be cleared very carefully,
|
|
|
# skipping the deletion of the builtin-related keys, because doing so
|
|
|
# would cause errors in many object's __del__ methods.
|
|
|
if self.user_ns is not self.user_global_ns:
|
|
|
self.user_ns.clear()
|
|
|
ns = self.user_global_ns
|
|
|
drop_keys = set(ns.keys())
|
|
|
drop_keys.discard('__builtin__')
|
|
|
drop_keys.discard('__builtins__')
|
|
|
drop_keys.discard('__name__')
|
|
|
for k in drop_keys:
|
|
|
del ns[k]
|
|
|
|
|
|
self.user_ns_hidden.clear()
|
|
|
|
|
|
# Restore the user namespaces to minimal usability
|
|
|
self.init_user_ns()
|
|
|
|
|
|
# Restore the default and user aliases
|
|
|
self.alias_manager.clear_aliases()
|
|
|
self.alias_manager.init_aliases()
|
|
|
|
|
|
# Flush the private list of module references kept for script
|
|
|
# execution protection
|
|
|
self.clear_main_mod_cache()
|
|
|
|
|
|
def del_var(self, varname, by_name=False):
|
|
|
"""Delete a variable from the various namespaces, so that, as
|
|
|
far as possible, we're not keeping any hidden references to it.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
varname : str
|
|
|
The name of the variable to delete.
|
|
|
by_name : bool
|
|
|
If True, delete variables with the given name in each
|
|
|
namespace. If False (default), find the variable in the user
|
|
|
namespace, and delete references to it.
|
|
|
"""
|
|
|
if varname in ('__builtin__', '__builtins__'):
|
|
|
raise ValueError("Refusing to delete %s" % varname)
|
|
|
|
|
|
ns_refs = self.all_ns_refs
|
|
|
|
|
|
if by_name: # Delete by name
|
|
|
for ns in ns_refs:
|
|
|
try:
|
|
|
del ns[varname]
|
|
|
except KeyError:
|
|
|
pass
|
|
|
else: # Delete by object
|
|
|
try:
|
|
|
obj = self.user_ns[varname]
|
|
|
except KeyError:
|
|
|
raise NameError("name '%s' is not defined" % varname)
|
|
|
# Also check in output history
|
|
|
ns_refs.append(self.history_manager.output_hist)
|
|
|
for ns in ns_refs:
|
|
|
to_delete = [n for n, o in iteritems(ns) if o is obj]
|
|
|
for name in to_delete:
|
|
|
del ns[name]
|
|
|
|
|
|
# displayhook keeps extra references, but not in a dictionary
|
|
|
for name in ('_', '__', '___'):
|
|
|
if getattr(self.displayhook, name) is obj:
|
|
|
setattr(self.displayhook, name, None)
|
|
|
|
|
|
def reset_selective(self, regex=None):
|
|
|
"""Clear selective variables from internal namespaces based on a
|
|
|
specified regular expression.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
regex : string or compiled pattern, optional
|
|
|
A regular expression pattern that will be used in searching
|
|
|
variable names in the users namespaces.
|
|
|
"""
|
|
|
if regex is not None:
|
|
|
try:
|
|
|
m = re.compile(regex)
|
|
|
except TypeError:
|
|
|
raise TypeError('regex must be a string or compiled pattern')
|
|
|
# Search for keys in each namespace that match the given regex
|
|
|
# If a match is found, delete the key/value pair.
|
|
|
for ns in self.all_ns_refs:
|
|
|
for var in ns:
|
|
|
if m.search(var):
|
|
|
del ns[var]
|
|
|
|
|
|
def push(self, variables, interactive=True):
|
|
|
"""Inject a group of variables into the IPython user namespace.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
variables : dict, str or list/tuple of str
|
|
|
The variables to inject into the user's namespace. If a dict, a
|
|
|
simple update is done. If a str, the string is assumed to have
|
|
|
variable names separated by spaces. A list/tuple of str can also
|
|
|
be used to give the variable names. If just the variable names are
|
|
|
give (list/tuple/str) then the variable values looked up in the
|
|
|
callers frame.
|
|
|
interactive : bool
|
|
|
If True (default), the variables will be listed with the ``who``
|
|
|
magic.
|
|
|
"""
|
|
|
vdict = None
|
|
|
|
|
|
# We need a dict of name/value pairs to do namespace updates.
|
|
|
if isinstance(variables, dict):
|
|
|
vdict = variables
|
|
|
elif isinstance(variables, string_types+(list, tuple)):
|
|
|
if isinstance(variables, string_types):
|
|
|
vlist = variables.split()
|
|
|
else:
|
|
|
vlist = variables
|
|
|
vdict = {}
|
|
|
cf = sys._getframe(1)
|
|
|
for name in vlist:
|
|
|
try:
|
|
|
vdict[name] = eval(name, cf.f_globals, cf.f_locals)
|
|
|
except:
|
|
|
print('Could not get variable %s from %s' %
|
|
|
(name,cf.f_code.co_name))
|
|
|
else:
|
|
|
raise ValueError('variables must be a dict/str/list/tuple')
|
|
|
|
|
|
# Propagate variables to user namespace
|
|
|
self.user_ns.update(vdict)
|
|
|
|
|
|
# And configure interactive visibility
|
|
|
user_ns_hidden = self.user_ns_hidden
|
|
|
if interactive:
|
|
|
for name in vdict:
|
|
|
user_ns_hidden.pop(name, None)
|
|
|
else:
|
|
|
user_ns_hidden.update(vdict)
|
|
|
|
|
|
def drop_by_id(self, variables):
|
|
|
"""Remove a dict of variables from the user namespace, if they are the
|
|
|
same as the values in the dictionary.
|
|
|
|
|
|
This is intended for use by extensions: variables that they've added can
|
|
|
be taken back out if they are unloaded, without removing any that the
|
|
|
user has overwritten.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
variables : dict
|
|
|
A dictionary mapping object names (as strings) to the objects.
|
|
|
"""
|
|
|
for name, obj in iteritems(variables):
|
|
|
if name in self.user_ns and self.user_ns[name] is obj:
|
|
|
del self.user_ns[name]
|
|
|
self.user_ns_hidden.pop(name, None)
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to object introspection
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def _ofind(self, oname, namespaces=None):
|
|
|
"""Find an object in the available namespaces.
|
|
|
|
|
|
self._ofind(oname) -> dict with keys: found,obj,ospace,ismagic
|
|
|
|
|
|
Has special code to detect magic functions.
|
|
|
"""
|
|
|
oname = oname.strip()
|
|
|
#print '1- oname: <%r>' % oname # dbg
|
|
|
if not oname.startswith(ESC_MAGIC) and \
|
|
|
not oname.startswith(ESC_MAGIC2) and \
|
|
|
not py3compat.isidentifier(oname, dotted=True):
|
|
|
return dict(found=False)
|
|
|
|
|
|
alias_ns = None
|
|
|
if namespaces is None:
|
|
|
# Namespaces to search in:
|
|
|
# Put them in a list. The order is important so that we
|
|
|
# find things in the same order that Python finds them.
|
|
|
namespaces = [ ('Interactive', self.user_ns),
|
|
|
('Interactive (global)', self.user_global_ns),
|
|
|
('Python builtin', builtin_mod.__dict__),
|
|
|
]
|
|
|
|
|
|
# initialize results to 'null'
|
|
|
found = False; obj = None; ospace = None; ds = None;
|
|
|
ismagic = False; isalias = False; parent = None
|
|
|
|
|
|
# We need to special-case 'print', which as of python2.6 registers as a
|
|
|
# function but should only be treated as one if print_function was
|
|
|
# loaded with a future import. In this case, just bail.
|
|
|
if (oname == 'print' and not py3compat.PY3 and not \
|
|
|
(self.compile.compiler_flags & __future__.CO_FUTURE_PRINT_FUNCTION)):
|
|
|
return {'found':found, 'obj':obj, 'namespace':ospace,
|
|
|
'ismagic':ismagic, 'isalias':isalias, 'parent':parent}
|
|
|
|
|
|
# Look for the given name by splitting it in parts. If the head is
|
|
|
# found, then we look for all the remaining parts as members, and only
|
|
|
# declare success if we can find them all.
|
|
|
oname_parts = oname.split('.')
|
|
|
oname_head, oname_rest = oname_parts[0],oname_parts[1:]
|
|
|
for nsname,ns in namespaces:
|
|
|
try:
|
|
|
obj = ns[oname_head]
|
|
|
except KeyError:
|
|
|
continue
|
|
|
else:
|
|
|
#print 'oname_rest:', oname_rest # dbg
|
|
|
for idx, part in enumerate(oname_rest):
|
|
|
try:
|
|
|
parent = obj
|
|
|
# The last part is looked up in a special way to avoid
|
|
|
# descriptor invocation as it may raise or have side
|
|
|
# effects.
|
|
|
if idx == len(oname_rest) - 1:
|
|
|
obj = self._getattr_property(obj, part)
|
|
|
else:
|
|
|
obj = getattr(obj, part)
|
|
|
except:
|
|
|
# Blanket except b/c some badly implemented objects
|
|
|
# allow __getattr__ to raise exceptions other than
|
|
|
# AttributeError, which then crashes IPython.
|
|
|
break
|
|
|
else:
|
|
|
# If we finish the for loop (no break), we got all members
|
|
|
found = True
|
|
|
ospace = nsname
|
|
|
break # namespace loop
|
|
|
|
|
|
# Try to see if it's magic
|
|
|
if not found:
|
|
|
obj = None
|
|
|
if oname.startswith(ESC_MAGIC2):
|
|
|
oname = oname.lstrip(ESC_MAGIC2)
|
|
|
obj = self.find_cell_magic(oname)
|
|
|
elif oname.startswith(ESC_MAGIC):
|
|
|
oname = oname.lstrip(ESC_MAGIC)
|
|
|
obj = self.find_line_magic(oname)
|
|
|
else:
|
|
|
# search without prefix, so run? will find %run?
|
|
|
obj = self.find_line_magic(oname)
|
|
|
if obj is None:
|
|
|
obj = self.find_cell_magic(oname)
|
|
|
if obj is not None:
|
|
|
found = True
|
|
|
ospace = 'IPython internal'
|
|
|
ismagic = True
|
|
|
isalias = isinstance(obj, Alias)
|
|
|
|
|
|
# Last try: special-case some literals like '', [], {}, etc:
|
|
|
if not found and oname_head in ["''",'""','[]','{}','()']:
|
|
|
obj = eval(oname_head)
|
|
|
found = True
|
|
|
ospace = 'Interactive'
|
|
|
|
|
|
return {'found':found, 'obj':obj, 'namespace':ospace,
|
|
|
'ismagic':ismagic, 'isalias':isalias, 'parent':parent}
|
|
|
|
|
|
@staticmethod
|
|
|
def _getattr_property(obj, attrname):
|
|
|
"""Property-aware getattr to use in object finding.
|
|
|
|
|
|
If attrname represents a property, return it unevaluated (in case it has
|
|
|
side effects or raises an error.
|
|
|
|
|
|
"""
|
|
|
if not isinstance(obj, type):
|
|
|
try:
|
|
|
# `getattr(type(obj), attrname)` is not guaranteed to return
|
|
|
# `obj`, but does so for property:
|
|
|
#
|
|
|
# property.__get__(self, None, cls) -> self
|
|
|
#
|
|
|
# The universal alternative is to traverse the mro manually
|
|
|
# searching for attrname in class dicts.
|
|
|
attr = getattr(type(obj), attrname)
|
|
|
except AttributeError:
|
|
|
pass
|
|
|
else:
|
|
|
# This relies on the fact that data descriptors (with both
|
|
|
# __get__ & __set__ magic methods) take precedence over
|
|
|
# instance-level attributes:
|
|
|
#
|
|
|
# class A(object):
|
|
|
# @property
|
|
|
# def foobar(self): return 123
|
|
|
# a = A()
|
|
|
# a.__dict__['foobar'] = 345
|
|
|
# a.foobar # == 123
|
|
|
#
|
|
|
# So, a property may be returned right away.
|
|
|
if isinstance(attr, property):
|
|
|
return attr
|
|
|
|
|
|
# Nothing helped, fall back.
|
|
|
return getattr(obj, attrname)
|
|
|
|
|
|
def _object_find(self, oname, namespaces=None):
|
|
|
"""Find an object and return a struct with info about it."""
|
|
|
return Struct(self._ofind(oname, namespaces))
|
|
|
|
|
|
def _inspect(self, meth, oname, namespaces=None, **kw):
|
|
|
"""Generic interface to the inspector system.
|
|
|
|
|
|
This function is meant to be called by pdef, pdoc & friends."""
|
|
|
info = self._object_find(oname, namespaces)
|
|
|
if info.found:
|
|
|
pmethod = getattr(self.inspector, meth)
|
|
|
formatter = format_screen if info.ismagic else None
|
|
|
if meth == 'pdoc':
|
|
|
pmethod(info.obj, oname, formatter)
|
|
|
elif meth == 'pinfo':
|
|
|
pmethod(info.obj, oname, formatter, info, **kw)
|
|
|
else:
|
|
|
pmethod(info.obj, oname)
|
|
|
else:
|
|
|
print('Object `%s` not found.' % oname)
|
|
|
return 'not found' # so callers can take other action
|
|
|
|
|
|
def object_inspect(self, oname, detail_level=0):
|
|
|
"""Get object info about oname"""
|
|
|
with self.builtin_trap:
|
|
|
info = self._object_find(oname)
|
|
|
if info.found:
|
|
|
return self.inspector.info(info.obj, oname, info=info,
|
|
|
detail_level=detail_level
|
|
|
)
|
|
|
else:
|
|
|
return oinspect.object_info(name=oname, found=False)
|
|
|
|
|
|
def object_inspect_text(self, oname, detail_level=0):
|
|
|
"""Get object info as formatted text"""
|
|
|
with self.builtin_trap:
|
|
|
info = self._object_find(oname)
|
|
|
if info.found:
|
|
|
return self.inspector._format_info(info.obj, oname, info=info,
|
|
|
detail_level=detail_level
|
|
|
)
|
|
|
else:
|
|
|
raise KeyError(oname)
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to history management
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def init_history(self):
|
|
|
"""Sets up the command history, and starts regular autosaves."""
|
|
|
self.history_manager = HistoryManager(shell=self, parent=self)
|
|
|
self.configurables.append(self.history_manager)
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to exception handling and tracebacks (not debugging)
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def init_traceback_handlers(self, custom_exceptions):
|
|
|
# Syntax error handler.
|
|
|
self.SyntaxTB = ultratb.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,
|
|
|
check_cache=check_linecache_ipython)
|
|
|
|
|
|
# The instance will store a pointer to the system-wide exception hook,
|
|
|
# so that runtime code (such as magics) can access it. This is because
|
|
|
# during the read-eval loop, it may get temporarily overwritten.
|
|
|
self.sys_excepthook = sys.excepthook
|
|
|
|
|
|
# and add any custom exception handlers the user may have specified
|
|
|
self.set_custom_exc(*custom_exceptions)
|
|
|
|
|
|
# Set the exception mode
|
|
|
self.InteractiveTB.set_mode(mode=self.xmode)
|
|
|
|
|
|
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
|
|
|
run_code() method).
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
|
|
|
exc_tuple : tuple of exception classes
|
|
|
A *tuple* of exception classes, for which to call the defined
|
|
|
handler. 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 : callable
|
|
|
handler must have the following signature::
|
|
|
|
|
|
def my_handler(self, etype, value, tb, tb_offset=None):
|
|
|
...
|
|
|
return structured_traceback
|
|
|
|
|
|
Your handler must return a structured traceback (a list of strings),
|
|
|
or None.
|
|
|
|
|
|
This will be made into an instance method (via types.MethodType)
|
|
|
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.
|
|
|
|
|
|
To protect IPython from crashes, if your handler ever raises an
|
|
|
exception or returns an invalid result, it will be immediately
|
|
|
disabled.
|
|
|
|
|
|
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,tb_offset=None):
|
|
|
print('*** Simple custom exception handler ***')
|
|
|
print('Exception type :',etype)
|
|
|
print('Exception value:',value)
|
|
|
print('Traceback :',tb)
|
|
|
#print 'Source code :','\n'.join(self.buffer)
|
|
|
|
|
|
def validate_stb(stb):
|
|
|
"""validate structured traceback return type
|
|
|
|
|
|
return type of CustomTB *should* be a list of strings, but allow
|
|
|
single strings or None, which are harmless.
|
|
|
|
|
|
This function will *always* return a list of strings,
|
|
|
and will raise a TypeError if stb is inappropriate.
|
|
|
"""
|
|
|
msg = "CustomTB must return list of strings, not %r" % stb
|
|
|
if stb is None:
|
|
|
return []
|
|
|
elif isinstance(stb, string_types):
|
|
|
return [stb]
|
|
|
elif not isinstance(stb, list):
|
|
|
raise TypeError(msg)
|
|
|
# it's a list
|
|
|
for line in stb:
|
|
|
# check every element
|
|
|
if not isinstance(line, string_types):
|
|
|
raise TypeError(msg)
|
|
|
return stb
|
|
|
|
|
|
if handler is None:
|
|
|
wrapped = dummy_handler
|
|
|
else:
|
|
|
def wrapped(self,etype,value,tb,tb_offset=None):
|
|
|
"""wrap CustomTB handler, to protect IPython from user code
|
|
|
|
|
|
This makes it harder (but not impossible) for custom exception
|
|
|
handlers to crash IPython.
|
|
|
"""
|
|
|
try:
|
|
|
stb = handler(self,etype,value,tb,tb_offset=tb_offset)
|
|
|
return validate_stb(stb)
|
|
|
except:
|
|
|
# clear custom handler immediately
|
|
|
self.set_custom_exc((), None)
|
|
|
print("Custom TB Handler failed, unregistering", file=io.stderr)
|
|
|
# show the exception in handler first
|
|
|
stb = self.InteractiveTB.structured_traceback(*sys.exc_info())
|
|
|
print(self.InteractiveTB.stb2text(stb), file=io.stdout)
|
|
|
print("The original exception:", file=io.stdout)
|
|
|
stb = self.InteractiveTB.structured_traceback(
|
|
|
(etype,value,tb), tb_offset=tb_offset
|
|
|
)
|
|
|
return stb
|
|
|
|
|
|
self.CustomTB = types.MethodType(wrapped,self)
|
|
|
self.custom_exceptions = exc_tuple
|
|
|
|
|
|
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 _get_exc_info(self, exc_tuple=None):
|
|
|
"""get exc_info from a given tuple, sys.exc_info() or sys.last_type etc.
|
|
|
|
|
|
Ensures sys.last_type,value,traceback hold the exc_info we found,
|
|
|
from whichever source.
|
|
|
|
|
|
raises ValueError if none of these contain any information
|
|
|
"""
|
|
|
if exc_tuple is None:
|
|
|
etype, value, tb = sys.exc_info()
|
|
|
else:
|
|
|
etype, value, tb = exc_tuple
|
|
|
|
|
|
if etype is None:
|
|
|
if hasattr(sys, 'last_type'):
|
|
|
etype, value, tb = sys.last_type, sys.last_value, \
|
|
|
sys.last_traceback
|
|
|
|
|
|
if etype is None:
|
|
|
raise ValueError("No exception to find")
|
|
|
|
|
|
# Now store the exception info in sys.last_type etc.
|
|
|
# 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
|
|
|
|
|
|
return etype, value, tb
|
|
|
|
|
|
def show_usage_error(self, exc):
|
|
|
"""Show a short message for UsageErrors
|
|
|
|
|
|
These are special exceptions that shouldn't show a traceback.
|
|
|
"""
|
|
|
self.write_err("UsageError: %s" % exc)
|
|
|
|
|
|
def get_exception_only(self, exc_tuple=None):
|
|
|
"""
|
|
|
Return as a string (ending with a newline) the exception that
|
|
|
just occurred, without any traceback.
|
|
|
"""
|
|
|
etype, value, tb = self._get_exc_info(exc_tuple)
|
|
|
msg = traceback.format_exception_only(etype, value)
|
|
|
return ''.join(msg)
|
|
|
|
|
|
def showtraceback(self, exc_tuple=None, filename=None, tb_offset=None,
|
|
|
exception_only=False):
|
|
|
"""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."""
|
|
|
|
|
|
try:
|
|
|
try:
|
|
|
etype, value, tb = self._get_exc_info(exc_tuple)
|
|
|
except ValueError:
|
|
|
self.write_err('No traceback available to show.\n')
|
|
|
return
|
|
|
|
|
|
if issubclass(etype, SyntaxError):
|
|
|
# Though this won't be called by syntax errors in the input
|
|
|
# line, there may be SyntaxError cases with imported code.
|
|
|
self.showsyntaxerror(filename)
|
|
|
elif etype is UsageError:
|
|
|
self.show_usage_error(value)
|
|
|
else:
|
|
|
if exception_only:
|
|
|
stb = ['An exception has occurred, use %tb to see '
|
|
|
'the full traceback.\n']
|
|
|
stb.extend(self.InteractiveTB.get_exception_only(etype,
|
|
|
value))
|
|
|
else:
|
|
|
try:
|
|
|
# Exception classes can customise their traceback - we
|
|
|
# use this in IPython.parallel for exceptions occurring
|
|
|
# in the engines. This should return a list of strings.
|
|
|
stb = value._render_traceback_()
|
|
|
except Exception:
|
|
|
stb = self.InteractiveTB.structured_traceback(etype,
|
|
|
value, tb, tb_offset=tb_offset)
|
|
|
|
|
|
self._showtraceback(etype, value, stb)
|
|
|
if self.call_pdb:
|
|
|
# drop into debugger
|
|
|
self.debugger(force=True)
|
|
|
return
|
|
|
|
|
|
# Actually show the traceback
|
|
|
self._showtraceback(etype, value, stb)
|
|
|
|
|
|
except KeyboardInterrupt:
|
|
|
self.write_err('\n' + self.get_exception_only())
|
|
|
|
|
|
def _showtraceback(self, etype, evalue, stb):
|
|
|
"""Actually show a traceback.
|
|
|
|
|
|
Subclasses may override this method to put the traceback on a different
|
|
|
place, like a side channel.
|
|
|
"""
|
|
|
print(self.InteractiveTB.stb2text(stb), file=io.stdout)
|
|
|
|
|
|
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 = self._get_exc_info()
|
|
|
|
|
|
if filename and issubclass(etype, SyntaxError):
|
|
|
try:
|
|
|
value.filename = filename
|
|
|
except:
|
|
|
# Not the format we expect; leave it alone
|
|
|
pass
|
|
|
|
|
|
stb = self.SyntaxTB.structured_traceback(etype, value, [])
|
|
|
self._showtraceback(etype, value, stb)
|
|
|
|
|
|
# This is overridden in TerminalInteractiveShell to show a message about
|
|
|
# the %paste magic.
|
|
|
def showindentationerror(self):
|
|
|
"""Called by run_cell when there's an IndentationError in code entered
|
|
|
at the prompt.
|
|
|
|
|
|
This is overridden in TerminalInteractiveShell to show a message about
|
|
|
the %paste magic."""
|
|
|
self.showsyntaxerror()
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to readline
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def init_readline(self):
|
|
|
"""Command history completion/saving/reloading."""
|
|
|
|
|
|
if self.readline_use:
|
|
|
import IPython.utils.rlineimpl as readline
|
|
|
|
|
|
self.rl_next_input = None
|
|
|
self.rl_do_indent = False
|
|
|
|
|
|
if not self.readline_use or not readline.have_readline:
|
|
|
self.has_readline = False
|
|
|
self.readline = None
|
|
|
# Set a number of methods that depend on readline to be no-op
|
|
|
self.readline_no_record = no_op_context
|
|
|
self.set_readline_completer = no_op
|
|
|
self.set_custom_completer = no_op
|
|
|
if self.readline_use:
|
|
|
warn('Readline services not available or not loaded.')
|
|
|
else:
|
|
|
self.has_readline = True
|
|
|
self.readline = readline
|
|
|
sys.modules['readline'] = readline
|
|
|
|
|
|
# Platform-specific configuration
|
|
|
if os.name == 'nt':
|
|
|
# FIXME - check with Frederick to see if we can harmonize
|
|
|
# naming conventions with pyreadline to avoid this
|
|
|
# platform-dependent check
|
|
|
self.readline_startup_hook = readline.set_pre_input_hook
|
|
|
else:
|
|
|
self.readline_startup_hook = readline.set_startup_hook
|
|
|
|
|
|
# Readline config order:
|
|
|
# - IPython config (default value)
|
|
|
# - custom inputrc
|
|
|
# - IPython config (user customized)
|
|
|
|
|
|
# load IPython config before inputrc if default
|
|
|
# skip if libedit because parse_and_bind syntax is different
|
|
|
if not self._custom_readline_config and not readline.uses_libedit:
|
|
|
for rlcommand in self.readline_parse_and_bind:
|
|
|
readline.parse_and_bind(rlcommand)
|
|
|
|
|
|
# Load user's initrc file (readline config)
|
|
|
# Or if libedit is used, load editrc.
|
|
|
inputrc_name = os.environ.get('INPUTRC')
|
|
|
if inputrc_name is None:
|
|
|
inputrc_name = '.inputrc'
|
|
|
if readline.uses_libedit:
|
|
|
inputrc_name = '.editrc'
|
|
|
inputrc_name = os.path.join(self.home_dir, inputrc_name)
|
|
|
if os.path.isfile(inputrc_name):
|
|
|
try:
|
|
|
readline.read_init_file(inputrc_name)
|
|
|
except:
|
|
|
warn('Problems reading readline initialization file <%s>'
|
|
|
% inputrc_name)
|
|
|
|
|
|
# load IPython config after inputrc if user has customized
|
|
|
if self._custom_readline_config:
|
|
|
for rlcommand in self.readline_parse_and_bind:
|
|
|
readline.parse_and_bind(rlcommand)
|
|
|
|
|
|
# Remove some chars from the delimiters list. If we encounter
|
|
|
# unicode chars, discard them.
|
|
|
delims = readline.get_completer_delims()
|
|
|
if not py3compat.PY3:
|
|
|
delims = delims.encode("ascii", "ignore")
|
|
|
for d in self.readline_remove_delims:
|
|
|
delims = delims.replace(d, "")
|
|
|
delims = delims.replace(ESC_MAGIC, '')
|
|
|
readline.set_completer_delims(delims)
|
|
|
# Store these so we can restore them if something like rpy2 modifies
|
|
|
# them.
|
|
|
self.readline_delims = delims
|
|
|
# otherwise we end up with a monster history after a while:
|
|
|
readline.set_history_length(self.history_length)
|
|
|
|
|
|
self.refill_readline_hist()
|
|
|
self.readline_no_record = ReadlineNoRecord(self)
|
|
|
|
|
|
# Configure auto-indent for all platforms
|
|
|
self.set_autoindent(self.autoindent)
|
|
|
|
|
|
def refill_readline_hist(self):
|
|
|
# Load the last 1000 lines from history
|
|
|
self.readline.clear_history()
|
|
|
stdin_encoding = sys.stdin.encoding or "utf-8"
|
|
|
last_cell = u""
|
|
|
for _, _, cell in self.history_manager.get_tail(self.history_load_length,
|
|
|
include_latest=True):
|
|
|
# Ignore blank lines and consecutive duplicates
|
|
|
cell = cell.rstrip()
|
|
|
if cell and (cell != last_cell):
|
|
|
try:
|
|
|
if self.multiline_history:
|
|
|
self.readline.add_history(py3compat.unicode_to_str(cell,
|
|
|
stdin_encoding))
|
|
|
else:
|
|
|
for line in cell.splitlines():
|
|
|
self.readline.add_history(py3compat.unicode_to_str(line,
|
|
|
stdin_encoding))
|
|
|
last_cell = cell
|
|
|
|
|
|
except TypeError:
|
|
|
# The history DB can get corrupted so it returns strings
|
|
|
# containing null bytes, which readline objects to.
|
|
|
continue
|
|
|
|
|
|
@skip_doctest
|
|
|
def set_next_input(self, s, replace=False):
|
|
|
""" Sets the 'default' input string for the next command line.
|
|
|
|
|
|
Requires readline.
|
|
|
|
|
|
Example::
|
|
|
|
|
|
In [1]: _ip.set_next_input("Hello Word")
|
|
|
In [2]: Hello Word_ # cursor is here
|
|
|
"""
|
|
|
self.rl_next_input = py3compat.cast_bytes_py2(s)
|
|
|
|
|
|
# Maybe move this to the terminal subclass?
|
|
|
def pre_readline(self):
|
|
|
"""readline hook to be used at the start of each line.
|
|
|
|
|
|
Currently it handles auto-indent only."""
|
|
|
|
|
|
if self.rl_do_indent:
|
|
|
self.readline.insert_text(self._indent_current_str())
|
|
|
if self.rl_next_input is not None:
|
|
|
self.readline.insert_text(self.rl_next_input)
|
|
|
self.rl_next_input = None
|
|
|
|
|
|
def _indent_current_str(self):
|
|
|
"""return the current level of indentation as a string"""
|
|
|
return self.input_splitter.indent_spaces * ' '
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to text completion
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def init_completer(self):
|
|
|
"""Initialize the completion machinery.
|
|
|
|
|
|
This creates completion machinery that can be used by client code,
|
|
|
either interactively in-process (typically triggered by the readline
|
|
|
library), programatically (such as in test suites) or out-of-prcess
|
|
|
(typically over the network by remote frontends).
|
|
|
"""
|
|
|
from IPython.core.completer import IPCompleter
|
|
|
from IPython.core.completerlib import (module_completer,
|
|
|
magic_run_completer, cd_completer, reset_completer)
|
|
|
|
|
|
self.Completer = IPCompleter(shell=self,
|
|
|
namespace=self.user_ns,
|
|
|
global_namespace=self.user_global_ns,
|
|
|
use_readline=self.has_readline,
|
|
|
parent=self,
|
|
|
)
|
|
|
self.configurables.append(self.Completer)
|
|
|
|
|
|
# Add custom completers to the basic ones built into IPCompleter
|
|
|
sdisp = self.strdispatchers.get('complete_command', StrDispatch())
|
|
|
self.strdispatchers['complete_command'] = sdisp
|
|
|
self.Completer.custom_completers = sdisp
|
|
|
|
|
|
self.set_hook('complete_command', module_completer, str_key = 'import')
|
|
|
self.set_hook('complete_command', module_completer, str_key = 'from')
|
|
|
self.set_hook('complete_command', magic_run_completer, str_key = '%run')
|
|
|
self.set_hook('complete_command', cd_completer, str_key = '%cd')
|
|
|
self.set_hook('complete_command', reset_completer, str_key = '%reset')
|
|
|
|
|
|
# Only configure readline if we truly are using readline. IPython can
|
|
|
# do tab-completion over the network, in GUIs, etc, where readline
|
|
|
# itself may be absent
|
|
|
if self.has_readline:
|
|
|
self.set_readline_completer()
|
|
|
|
|
|
def complete(self, text, line=None, cursor_pos=None):
|
|
|
"""Return the completed text and a list of completions.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
|
|
|
text : string
|
|
|
A string of text to be completed on. It can be given as empty and
|
|
|
instead a line/position pair are given. In this case, the
|
|
|
completer itself will split the line like readline does.
|
|
|
|
|
|
line : string, optional
|
|
|
The complete line that text is part of.
|
|
|
|
|
|
cursor_pos : int, optional
|
|
|
The position of the cursor on the input line.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
text : string
|
|
|
The actual text that was completed.
|
|
|
|
|
|
matches : list
|
|
|
A sorted list with all possible completions.
|
|
|
|
|
|
The optional arguments allow the completion to take more context into
|
|
|
account, and are part of the low-level completion API.
|
|
|
|
|
|
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.l', ['x.ljust', 'x.lower', 'x.lstrip'])
|
|
|
"""
|
|
|
|
|
|
# Inject names into __builtin__ so we can complete on the added names.
|
|
|
with self.builtin_trap:
|
|
|
return self.Completer.complete(text, line, cursor_pos)
|
|
|
|
|
|
def set_custom_completer(self, 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 = types.MethodType(completer,self.Completer)
|
|
|
self.Completer.matchers.insert(pos,newcomp)
|
|
|
|
|
|
def set_readline_completer(self):
|
|
|
"""Reset readline's completer to be our own."""
|
|
|
self.readline.set_completer(self.Completer.rlcomplete)
|
|
|
|
|
|
def set_completer_frame(self, frame=None):
|
|
|
"""Set the frame of the completer."""
|
|
|
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
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to magics
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def init_magics(self):
|
|
|
from IPython.core import magics as m
|
|
|
self.magics_manager = magic.MagicsManager(shell=self,
|
|
|
parent=self,
|
|
|
user_magics=m.UserMagics(self))
|
|
|
self.configurables.append(self.magics_manager)
|
|
|
|
|
|
# Expose as public API from the magics manager
|
|
|
self.register_magics = self.magics_manager.register
|
|
|
self.define_magic = self.magics_manager.define_magic
|
|
|
|
|
|
self.register_magics(m.AutoMagics, m.BasicMagics, m.CodeMagics,
|
|
|
m.ConfigMagics, m.DeprecatedMagics, m.DisplayMagics, m.ExecutionMagics,
|
|
|
m.ExtensionMagics, m.HistoryMagics, m.LoggingMagics,
|
|
|
m.NamespaceMagics, m.OSMagics, m.PylabMagics, m.ScriptMagics,
|
|
|
)
|
|
|
|
|
|
# Register Magic Aliases
|
|
|
mman = self.magics_manager
|
|
|
# FIXME: magic aliases should be defined by the Magics classes
|
|
|
# or in MagicsManager, not here
|
|
|
mman.register_alias('ed', 'edit')
|
|
|
mman.register_alias('hist', 'history')
|
|
|
mman.register_alias('rep', 'recall')
|
|
|
mman.register_alias('SVG', 'svg', 'cell')
|
|
|
mman.register_alias('HTML', 'html', 'cell')
|
|
|
mman.register_alias('file', 'writefile', 'cell')
|
|
|
|
|
|
# FIXME: Move the color initialization to the DisplayHook, which
|
|
|
# should be split into a prompt manager and displayhook. We probably
|
|
|
# even need a centralize colors management object.
|
|
|
self.magic('colors %s' % self.colors)
|
|
|
|
|
|
# Defined here so that it's included in the documentation
|
|
|
@functools.wraps(magic.MagicsManager.register_function)
|
|
|
def register_magic_function(self, func, magic_kind='line', magic_name=None):
|
|
|
self.magics_manager.register_function(func,
|
|
|
magic_kind=magic_kind, magic_name=magic_name)
|
|
|
|
|
|
def run_line_magic(self, magic_name, line):
|
|
|
"""Execute the given line magic.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
magic_name : str
|
|
|
Name of the desired magic function, without '%' prefix.
|
|
|
|
|
|
line : str
|
|
|
The rest of the input line as a single string.
|
|
|
"""
|
|
|
fn = self.find_line_magic(magic_name)
|
|
|
if fn is None:
|
|
|
cm = self.find_cell_magic(magic_name)
|
|
|
etpl = "Line magic function `%%%s` not found%s."
|
|
|
extra = '' if cm is None else (' (But cell magic `%%%%%s` exists, '
|
|
|
'did you mean that instead?)' % magic_name )
|
|
|
error(etpl % (magic_name, extra))
|
|
|
else:
|
|
|
# Note: this is the distance in the stack to the user's frame.
|
|
|
# This will need to be updated if the internal calling logic gets
|
|
|
# refactored, or else we'll be expanding the wrong variables.
|
|
|
stack_depth = 2
|
|
|
magic_arg_s = self.var_expand(line, stack_depth)
|
|
|
# Put magic args in a list so we can call with f(*a) syntax
|
|
|
args = [magic_arg_s]
|
|
|
kwargs = {}
|
|
|
# Grab local namespace if we need it:
|
|
|
if getattr(fn, "needs_local_scope", False):
|
|
|
kwargs['local_ns'] = sys._getframe(stack_depth).f_locals
|
|
|
with self.builtin_trap:
|
|
|
result = fn(*args,**kwargs)
|
|
|
return result
|
|
|
|
|
|
def run_cell_magic(self, magic_name, line, cell):
|
|
|
"""Execute the given cell magic.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
magic_name : str
|
|
|
Name of the desired magic function, without '%' prefix.
|
|
|
|
|
|
line : str
|
|
|
The rest of the first input line as a single string.
|
|
|
|
|
|
cell : str
|
|
|
The body of the cell as a (possibly multiline) string.
|
|
|
"""
|
|
|
fn = self.find_cell_magic(magic_name)
|
|
|
if fn is None:
|
|
|
lm = self.find_line_magic(magic_name)
|
|
|
etpl = "Cell magic `%%{0}` not found{1}."
|
|
|
extra = '' if lm is None else (' (But line magic `%{0}` exists, '
|
|
|
'did you mean that instead?)'.format(magic_name))
|
|
|
error(etpl.format(magic_name, extra))
|
|
|
elif cell == '':
|
|
|
message = '%%{0} is a cell magic, but the cell body is empty.'.format(magic_name)
|
|
|
if self.find_line_magic(magic_name) is not None:
|
|
|
message += ' Did you mean the line magic %{0} (single %)?'.format(magic_name)
|
|
|
raise UsageError(message)
|
|
|
else:
|
|
|
# Note: this is the distance in the stack to the user's frame.
|
|
|
# This will need to be updated if the internal calling logic gets
|
|
|
# refactored, or else we'll be expanding the wrong variables.
|
|
|
stack_depth = 2
|
|
|
magic_arg_s = self.var_expand(line, stack_depth)
|
|
|
with self.builtin_trap:
|
|
|
result = fn(magic_arg_s, cell)
|
|
|
return result
|
|
|
|
|
|
def find_line_magic(self, magic_name):
|
|
|
"""Find and return a line magic by name.
|
|
|
|
|
|
Returns None if the magic isn't found."""
|
|
|
return self.magics_manager.magics['line'].get(magic_name)
|
|
|
|
|
|
def find_cell_magic(self, magic_name):
|
|
|
"""Find and return a cell magic by name.
|
|
|
|
|
|
Returns None if the magic isn't found."""
|
|
|
return self.magics_manager.magics['cell'].get(magic_name)
|
|
|
|
|
|
def find_magic(self, magic_name, magic_kind='line'):
|
|
|
"""Find and return a magic of the given type by name.
|
|
|
|
|
|
Returns None if the magic isn't found."""
|
|
|
return self.magics_manager.magics[magic_kind].get(magic_name)
|
|
|
|
|
|
def magic(self, arg_s):
|
|
|
"""DEPRECATED. Use run_line_magic() instead.
|
|
|
|
|
|
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.
|
|
|
|
|
|
magic('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 magic('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.
|
|
|
"""
|
|
|
# TODO: should we issue a loud deprecation warning here?
|
|
|
magic_name, _, magic_arg_s = arg_s.partition(' ')
|
|
|
magic_name = magic_name.lstrip(prefilter.ESC_MAGIC)
|
|
|
return self.run_line_magic(magic_name, magic_arg_s)
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to macros
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def define_macro(self, name, themacro):
|
|
|
"""Define a new macro
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
name : str
|
|
|
The name of the macro.
|
|
|
themacro : str or Macro
|
|
|
The action to do upon invoking the macro. If a string, a new
|
|
|
Macro object is created by passing the string to it.
|
|
|
"""
|
|
|
|
|
|
from IPython.core import macro
|
|
|
|
|
|
if isinstance(themacro, string_types):
|
|
|
themacro = macro.Macro(themacro)
|
|
|
if not isinstance(themacro, macro.Macro):
|
|
|
raise ValueError('A macro must be a string or a Macro instance.')
|
|
|
self.user_ns[name] = themacro
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to the running of system commands
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def system_piped(self, cmd):
|
|
|
"""Call the given cmd in a subprocess, piping stdout/err
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
cmd : str
|
|
|
Command to execute (can not end in '&', as background processes are
|
|
|
not supported. Should not be a command that expects input
|
|
|
other than simple text.
|
|
|
"""
|
|
|
if cmd.rstrip().endswith('&'):
|
|
|
# this is *far* from a rigorous test
|
|
|
# We do not support backgrounding processes because we either use
|
|
|
# pexpect or pipes to read from. Users can always just call
|
|
|
# os.system() or use ip.system=ip.system_raw
|
|
|
# if they really want a background process.
|
|
|
raise OSError("Background processes not supported.")
|
|
|
|
|
|
# we explicitly do NOT return the subprocess status code, because
|
|
|
# a non-None value would trigger :func:`sys.displayhook` calls.
|
|
|
# Instead, we store the exit_code in user_ns.
|
|
|
self.user_ns['_exit_code'] = system(self.var_expand(cmd, depth=1))
|
|
|
|
|
|
def system_raw(self, cmd):
|
|
|
"""Call the given cmd in a subprocess using os.system on Windows or
|
|
|
subprocess.call using the system shell on other platforms.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
cmd : str
|
|
|
Command to execute.
|
|
|
"""
|
|
|
cmd = self.var_expand(cmd, depth=1)
|
|
|
# protect os.system from UNC paths on Windows, which it can't handle:
|
|
|
if sys.platform == 'win32':
|
|
|
from IPython.utils._process_win32 import AvoidUNCPath
|
|
|
with AvoidUNCPath() as path:
|
|
|
if path is not None:
|
|
|
cmd = '"pushd %s &&"%s' % (path, cmd)
|
|
|
cmd = py3compat.unicode_to_str(cmd)
|
|
|
try:
|
|
|
ec = os.system(cmd)
|
|
|
except KeyboardInterrupt:
|
|
|
self.write_err('\n' + self.get_exception_only())
|
|
|
ec = -2
|
|
|
else:
|
|
|
cmd = py3compat.unicode_to_str(cmd)
|
|
|
# For posix the result of the subprocess.call() below is an exit
|
|
|
# code, which by convention is zero for success, positive for
|
|
|
# program failure. Exit codes above 128 are reserved for signals,
|
|
|
# and the formula for converting a signal to an exit code is usually
|
|
|
# signal_number+128. To more easily differentiate between exit
|
|
|
# codes and signals, ipython uses negative numbers. For instance
|
|
|
# since control-c is signal 2 but exit code 130, ipython's
|
|
|
# _exit_code variable will read -2. Note that some shells like
|
|
|
# csh and fish don't follow sh/bash conventions for exit codes.
|
|
|
executable = os.environ.get('SHELL', None)
|
|
|
try:
|
|
|
# Use env shell instead of default /bin/sh
|
|
|
ec = subprocess.call(cmd, shell=True, executable=executable)
|
|
|
except KeyboardInterrupt:
|
|
|
# intercept control-C; a long traceback is not useful here
|
|
|
self.write_err('\n' + self.get_exception_only())
|
|
|
ec = 130
|
|
|
if ec > 128:
|
|
|
ec = -(ec - 128)
|
|
|
|
|
|
# We explicitly do NOT return the subprocess status code, because
|
|
|
# a non-None value would trigger :func:`sys.displayhook` calls.
|
|
|
# Instead, we store the exit_code in user_ns. Note the semantics
|
|
|
# of _exit_code: for control-c, _exit_code == -signal.SIGNIT,
|
|
|
# but raising SystemExit(_exit_code) will give status 254!
|
|
|
self.user_ns['_exit_code'] = ec
|
|
|
|
|
|
# use piped system by default, because it is better behaved
|
|
|
system = system_piped
|
|
|
|
|
|
def getoutput(self, cmd, split=True, depth=0):
|
|
|
"""Get output (possibly including stderr) from a subprocess.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
cmd : str
|
|
|
Command to execute (can not end in '&', as background processes are
|
|
|
not supported.
|
|
|
split : bool, optional
|
|
|
If True, split the output into an IPython SList. Otherwise, an
|
|
|
IPython LSString is returned. These are objects similar to normal
|
|
|
lists and strings, with a few convenience attributes for easier
|
|
|
manipulation of line-based output. You can use '?' on them for
|
|
|
details.
|
|
|
depth : int, optional
|
|
|
How many frames above the caller are the local variables which should
|
|
|
be expanded in the command string? The default (0) assumes that the
|
|
|
expansion variables are in the stack frame calling this function.
|
|
|
"""
|
|
|
if cmd.rstrip().endswith('&'):
|
|
|
# this is *far* from a rigorous test
|
|
|
raise OSError("Background processes not supported.")
|
|
|
out = getoutput(self.var_expand(cmd, depth=depth+1))
|
|
|
if split:
|
|
|
out = SList(out.splitlines())
|
|
|
else:
|
|
|
out = LSString(out)
|
|
|
return out
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to aliases
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def init_alias(self):
|
|
|
self.alias_manager = AliasManager(shell=self, parent=self)
|
|
|
self.configurables.append(self.alias_manager)
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to extensions
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def init_extension_manager(self):
|
|
|
self.extension_manager = ExtensionManager(shell=self, parent=self)
|
|
|
self.configurables.append(self.extension_manager)
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to payloads
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def init_payload(self):
|
|
|
self.payload_manager = PayloadManager(parent=self)
|
|
|
self.configurables.append(self.payload_manager)
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to the prefilter
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def init_prefilter(self):
|
|
|
self.prefilter_manager = PrefilterManager(shell=self, parent=self)
|
|
|
self.configurables.append(self.prefilter_manager)
|
|
|
# Ultimately this will be refactored in the new interpreter code, but
|
|
|
# for now, we should expose the main prefilter method (there's legacy
|
|
|
# code out there that may rely on this).
|
|
|
self.prefilter = self.prefilter_manager.prefilter_lines
|
|
|
|
|
|
def auto_rewrite_input(self, cmd):
|
|
|
"""Print to the screen the rewritten form of the user's command.
|
|
|
|
|
|
This shows visual feedback by rewriting input lines that cause
|
|
|
automatic calling to kick in, like::
|
|
|
|
|
|
/f x
|
|
|
|
|
|
into::
|
|
|
|
|
|
------> f(x)
|
|
|
|
|
|
after the user's input prompt. This helps the user understand that the
|
|
|
input line was transformed automatically by IPython.
|
|
|
"""
|
|
|
if not self.show_rewritten_input:
|
|
|
return
|
|
|
|
|
|
rw = self.prompt_manager.render('rewrite') + cmd
|
|
|
|
|
|
try:
|
|
|
# plain ascii works better w/ pyreadline, on some machines, so
|
|
|
# we use it and only print uncolored rewrite if we have unicode
|
|
|
rw = str(rw)
|
|
|
print(rw, file=io.stdout)
|
|
|
except UnicodeEncodeError:
|
|
|
print("------> " + cmd)
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to extracting values/expressions from kernel and user_ns
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def _user_obj_error(self):
|
|
|
"""return simple exception dict
|
|
|
|
|
|
for use in user_expressions
|
|
|
"""
|
|
|
|
|
|
etype, evalue, tb = self._get_exc_info()
|
|
|
stb = self.InteractiveTB.get_exception_only(etype, evalue)
|
|
|
|
|
|
exc_info = {
|
|
|
u'status' : 'error',
|
|
|
u'traceback' : stb,
|
|
|
u'ename' : unicode_type(etype.__name__),
|
|
|
u'evalue' : py3compat.safe_unicode(evalue),
|
|
|
}
|
|
|
|
|
|
return exc_info
|
|
|
|
|
|
def _format_user_obj(self, obj):
|
|
|
"""format a user object to display dict
|
|
|
|
|
|
for use in user_expressions
|
|
|
"""
|
|
|
|
|
|
data, md = self.display_formatter.format(obj)
|
|
|
value = {
|
|
|
'status' : 'ok',
|
|
|
'data' : data,
|
|
|
'metadata' : md,
|
|
|
}
|
|
|
return value
|
|
|
|
|
|
def user_expressions(self, expressions):
|
|
|
"""Evaluate a dict of expressions in the user's namespace.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
expressions : dict
|
|
|
A dict with string keys and string values. The expression values
|
|
|
should be valid Python expressions, each of which will be evaluated
|
|
|
in the user namespace.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
A dict, keyed like the input expressions dict, with the rich mime-typed
|
|
|
display_data of each value.
|
|
|
"""
|
|
|
out = {}
|
|
|
user_ns = self.user_ns
|
|
|
global_ns = self.user_global_ns
|
|
|
|
|
|
for key, expr in iteritems(expressions):
|
|
|
try:
|
|
|
value = self._format_user_obj(eval(expr, global_ns, user_ns))
|
|
|
except:
|
|
|
value = self._user_obj_error()
|
|
|
out[key] = value
|
|
|
return out
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to the running of code
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def ex(self, cmd):
|
|
|
"""Execute a normal python statement in user namespace."""
|
|
|
with self.builtin_trap:
|
|
|
exec(cmd, self.user_global_ns, self.user_ns)
|
|
|
|
|
|
def ev(self, expr):
|
|
|
"""Evaluate python expression expr in user namespace.
|
|
|
|
|
|
Returns the result of evaluation
|
|
|
"""
|
|
|
with self.builtin_trap:
|
|
|
return eval(expr, self.user_global_ns, self.user_ns)
|
|
|
|
|
|
def safe_execfile(self, fname, *where, **kw):
|
|
|
"""A safe version of the builtin execfile().
|
|
|
|
|
|
This version will never throw an exception, but instead print
|
|
|
helpful error messages to the screen. This only works on pure
|
|
|
Python files with the .py extension.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
fname : string
|
|
|
The name of the file to be executed.
|
|
|
where : tuple
|
|
|
One or two namespaces, passed to execfile() as (globals,locals).
|
|
|
If only one is given, it is passed as both.
|
|
|
exit_ignore : bool (False)
|
|
|
If True, then silence SystemExit for non-zero status (it is always
|
|
|
silenced for zero status, as it is so common).
|
|
|
raise_exceptions : bool (False)
|
|
|
If True raise exceptions everywhere. Meant for testing.
|
|
|
shell_futures : bool (False)
|
|
|
If True, the code will share future statements with the interactive
|
|
|
shell. It will both be affected by previous __future__ imports, and
|
|
|
any __future__ imports in the code will affect the shell. If False,
|
|
|
__future__ imports are not shared in either direction.
|
|
|
|
|
|
"""
|
|
|
kw.setdefault('exit_ignore', False)
|
|
|
kw.setdefault('raise_exceptions', False)
|
|
|
kw.setdefault('shell_futures', False)
|
|
|
|
|
|
fname = os.path.abspath(os.path.expanduser(fname))
|
|
|
|
|
|
# Make sure we can open the file
|
|
|
try:
|
|
|
with open(fname) as thefile:
|
|
|
pass
|
|
|
except:
|
|
|
warn('Could not open file <%s> for safe execution.' % fname)
|
|
|
return
|
|
|
|
|
|
# Find things also in current directory. This is needed to mimic the
|
|
|
# behavior of running a script from the system command line, where
|
|
|
# Python inserts the script's directory into sys.path
|
|
|
dname = os.path.dirname(fname)
|
|
|
|
|
|
with prepended_to_syspath(dname):
|
|
|
try:
|
|
|
glob, loc = (where + (None, ))[:2]
|
|
|
py3compat.execfile(
|
|
|
fname, glob, loc,
|
|
|
self.compile if kw['shell_futures'] else None)
|
|
|
except SystemExit as status:
|
|
|
# If the call was made with 0 or None exit status (sys.exit(0)
|
|
|
# or sys.exit() ), don't bother showing a traceback, as both of
|
|
|
# these are considered normal by the OS:
|
|
|
# > python -c'import sys;sys.exit(0)'; echo $?
|
|
|
# 0
|
|
|
# > python -c'import sys;sys.exit()'; echo $?
|
|
|
# 0
|
|
|
# For other exit status, we show the exception unless
|
|
|
# explicitly silenced, but only in short form.
|
|
|
if kw['raise_exceptions']:
|
|
|
raise
|
|
|
if status.code and not kw['exit_ignore']:
|
|
|
self.showtraceback(exception_only=True)
|
|
|
except:
|
|
|
if kw['raise_exceptions']:
|
|
|
raise
|
|
|
# tb offset is 2 because we wrap execfile
|
|
|
self.showtraceback(tb_offset=2)
|
|
|
|
|
|
def safe_execfile_ipy(self, fname, shell_futures=False, raise_exceptions=False):
|
|
|
"""Like safe_execfile, but for .ipy or .ipynb files with IPython syntax.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
fname : str
|
|
|
The name of the file to execute. The filename must have a
|
|
|
.ipy or .ipynb extension.
|
|
|
shell_futures : bool (False)
|
|
|
If True, the code will share future statements with the interactive
|
|
|
shell. It will both be affected by previous __future__ imports, and
|
|
|
any __future__ imports in the code will affect the shell. If False,
|
|
|
__future__ imports are not shared in either direction.
|
|
|
raise_exceptions : bool (False)
|
|
|
If True raise exceptions everywhere. Meant for testing.
|
|
|
"""
|
|
|
fname = os.path.abspath(os.path.expanduser(fname))
|
|
|
|
|
|
# Make sure we can open the file
|
|
|
try:
|
|
|
with open(fname) as thefile:
|
|
|
pass
|
|
|
except:
|
|
|
warn('Could not open file <%s> for safe execution.' % fname)
|
|
|
return
|
|
|
|
|
|
# Find things also in current directory. This is needed to mimic the
|
|
|
# behavior of running a script from the system command line, where
|
|
|
# Python inserts the script's directory into sys.path
|
|
|
dname = os.path.dirname(fname)
|
|
|
|
|
|
def get_cells():
|
|
|
"""generator for sequence of code blocks to run"""
|
|
|
if fname.endswith('.ipynb'):
|
|
|
from nbformat import read
|
|
|
with io_open(fname) as f:
|
|
|
nb = read(f, as_version=4)
|
|
|
if not nb.cells:
|
|
|
return
|
|
|
for cell in nb.cells:
|
|
|
if cell.cell_type == 'code':
|
|
|
yield cell.source
|
|
|
else:
|
|
|
with open(fname) as f:
|
|
|
yield f.read()
|
|
|
|
|
|
with prepended_to_syspath(dname):
|
|
|
try:
|
|
|
for cell in get_cells():
|
|
|
result = self.run_cell(cell, silent=True, shell_futures=shell_futures)
|
|
|
if raise_exceptions:
|
|
|
result.raise_error()
|
|
|
elif not result.success:
|
|
|
break
|
|
|
except:
|
|
|
if raise_exceptions:
|
|
|
raise
|
|
|
self.showtraceback()
|
|
|
warn('Unknown failure executing file: <%s>' % fname)
|
|
|
|
|
|
def safe_run_module(self, mod_name, where):
|
|
|
"""A safe version of runpy.run_module().
|
|
|
|
|
|
This version will never throw an exception, but instead print
|
|
|
helpful error messages to the screen.
|
|
|
|
|
|
`SystemExit` exceptions with status code 0 or None are ignored.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
mod_name : string
|
|
|
The name of the module to be executed.
|
|
|
where : dict
|
|
|
The globals namespace.
|
|
|
"""
|
|
|
try:
|
|
|
try:
|
|
|
where.update(
|
|
|
runpy.run_module(str(mod_name), run_name="__main__",
|
|
|
alter_sys=True)
|
|
|
)
|
|
|
except SystemExit as status:
|
|
|
if status.code:
|
|
|
raise
|
|
|
except:
|
|
|
self.showtraceback()
|
|
|
warn('Unknown failure executing module: <%s>' % mod_name)
|
|
|
|
|
|
def _run_cached_cell_magic(self, magic_name, line):
|
|
|
"""Special method to call a cell magic with the data stored in self.
|
|
|
"""
|
|
|
cell = self._current_cell_magic_body
|
|
|
self._current_cell_magic_body = None
|
|
|
return self.run_cell_magic(magic_name, line, cell)
|
|
|
|
|
|
def run_cell(self, raw_cell, store_history=False, silent=False, shell_futures=True):
|
|
|
"""Run a complete IPython cell.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
raw_cell : str
|
|
|
The code (including IPython code such as %magic functions) to run.
|
|
|
store_history : bool
|
|
|
If True, the raw and translated cell will be stored in IPython's
|
|
|
history. For user code calling back into IPython's machinery, this
|
|
|
should be set to False.
|
|
|
silent : bool
|
|
|
If True, avoid side-effects, such as implicit displayhooks and
|
|
|
and logging. silent=True forces store_history=False.
|
|
|
shell_futures : bool
|
|
|
If True, the code will share future statements with the interactive
|
|
|
shell. It will both be affected by previous __future__ imports, and
|
|
|
any __future__ imports in the code will affect the shell. If False,
|
|
|
__future__ imports are not shared in either direction.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
result : :class:`ExecutionResult`
|
|
|
"""
|
|
|
result = ExecutionResult()
|
|
|
|
|
|
if (not raw_cell) or raw_cell.isspace():
|
|
|
return result
|
|
|
|
|
|
if silent:
|
|
|
store_history = False
|
|
|
|
|
|
if store_history:
|
|
|
result.execution_count = self.execution_count
|
|
|
|
|
|
def error_before_exec(value):
|
|
|
result.error_before_exec = value
|
|
|
return result
|
|
|
|
|
|
self.events.trigger('pre_execute')
|
|
|
if not silent:
|
|
|
self.events.trigger('pre_run_cell')
|
|
|
|
|
|
# If any of our input transformation (input_transformer_manager or
|
|
|
# prefilter_manager) raises an exception, we store it in this variable
|
|
|
# so that we can display the error after logging the input and storing
|
|
|
# it in the history.
|
|
|
preprocessing_exc_tuple = None
|
|
|
try:
|
|
|
# Static input transformations
|
|
|
cell = self.input_transformer_manager.transform_cell(raw_cell)
|
|
|
except SyntaxError:
|
|
|
preprocessing_exc_tuple = sys.exc_info()
|
|
|
cell = raw_cell # cell has to exist so it can be stored/logged
|
|
|
else:
|
|
|
if len(cell.splitlines()) == 1:
|
|
|
# Dynamic transformations - only applied for single line commands
|
|
|
with self.builtin_trap:
|
|
|
try:
|
|
|
# use prefilter_lines to handle trailing newlines
|
|
|
# restore trailing newline for ast.parse
|
|
|
cell = self.prefilter_manager.prefilter_lines(cell) + '\n'
|
|
|
except Exception:
|
|
|
# don't allow prefilter errors to crash IPython
|
|
|
preprocessing_exc_tuple = sys.exc_info()
|
|
|
|
|
|
# Store raw and processed history
|
|
|
if store_history:
|
|
|
self.history_manager.store_inputs(self.execution_count,
|
|
|
cell, raw_cell)
|
|
|
if not silent:
|
|
|
self.logger.log(cell, raw_cell)
|
|
|
|
|
|
# Display the exception if input processing failed.
|
|
|
if preprocessing_exc_tuple is not None:
|
|
|
self.showtraceback(preprocessing_exc_tuple)
|
|
|
if store_history:
|
|
|
self.execution_count += 1
|
|
|
return error_before_exec(preprocessing_exc_tuple[2])
|
|
|
|
|
|
# Our own compiler remembers the __future__ environment. If we want to
|
|
|
# run code with a separate __future__ environment, use the default
|
|
|
# compiler
|
|
|
compiler = self.compile if shell_futures else CachingCompiler()
|
|
|
|
|
|
with self.builtin_trap:
|
|
|
cell_name = self.compile.cache(cell, self.execution_count)
|
|
|
|
|
|
with self.display_trap:
|
|
|
# Compile to bytecode
|
|
|
try:
|
|
|
code_ast = compiler.ast_parse(cell, filename=cell_name)
|
|
|
except IndentationError as e:
|
|
|
self.showindentationerror()
|
|
|
if store_history:
|
|
|
self.execution_count += 1
|
|
|
return error_before_exec(e)
|
|
|
except (OverflowError, SyntaxError, ValueError, TypeError,
|
|
|
MemoryError) as e:
|
|
|
self.showsyntaxerror()
|
|
|
if store_history:
|
|
|
self.execution_count += 1
|
|
|
return error_before_exec(e)
|
|
|
|
|
|
# Apply AST transformations
|
|
|
try:
|
|
|
code_ast = self.transform_ast(code_ast)
|
|
|
except InputRejected as e:
|
|
|
self.showtraceback()
|
|
|
if store_history:
|
|
|
self.execution_count += 1
|
|
|
return error_before_exec(e)
|
|
|
|
|
|
# Give the displayhook a reference to our ExecutionResult so it
|
|
|
# can fill in the output value.
|
|
|
self.displayhook.exec_result = result
|
|
|
|
|
|
# Execute the user code
|
|
|
interactivity = "none" if silent else self.ast_node_interactivity
|
|
|
self.run_ast_nodes(code_ast.body, cell_name,
|
|
|
interactivity=interactivity, compiler=compiler, result=result)
|
|
|
|
|
|
# Reset this so later displayed values do not modify the
|
|
|
# ExecutionResult
|
|
|
self.displayhook.exec_result = None
|
|
|
|
|
|
self.events.trigger('post_execute')
|
|
|
if not silent:
|
|
|
self.events.trigger('post_run_cell')
|
|
|
|
|
|
if store_history:
|
|
|
# Write output to the database. Does nothing unless
|
|
|
# history output logging is enabled.
|
|
|
self.history_manager.store_output(self.execution_count)
|
|
|
# Each cell is a *single* input, regardless of how many lines it has
|
|
|
self.execution_count += 1
|
|
|
|
|
|
return result
|
|
|
|
|
|
def transform_ast(self, node):
|
|
|
"""Apply the AST transformations from self.ast_transformers
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
node : ast.Node
|
|
|
The root node to be transformed. Typically called with the ast.Module
|
|
|
produced by parsing user input.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
An ast.Node corresponding to the node it was called with. Note that it
|
|
|
may also modify the passed object, so don't rely on references to the
|
|
|
original AST.
|
|
|
"""
|
|
|
for transformer in self.ast_transformers:
|
|
|
try:
|
|
|
node = transformer.visit(node)
|
|
|
except InputRejected:
|
|
|
# User-supplied AST transformers can reject an input by raising
|
|
|
# an InputRejected. Short-circuit in this case so that we
|
|
|
# don't unregister the transform.
|
|
|
raise
|
|
|
except Exception:
|
|
|
warn("AST transformer %r threw an error. It will be unregistered." % transformer)
|
|
|
self.ast_transformers.remove(transformer)
|
|
|
|
|
|
if self.ast_transformers:
|
|
|
ast.fix_missing_locations(node)
|
|
|
return node
|
|
|
|
|
|
|
|
|
def run_ast_nodes(self, nodelist, cell_name, interactivity='last_expr',
|
|
|
compiler=compile, result=None):
|
|
|
"""Run a sequence of AST nodes. The execution mode depends on the
|
|
|
interactivity parameter.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
nodelist : list
|
|
|
A sequence of AST nodes to run.
|
|
|
cell_name : str
|
|
|
Will be passed to the compiler as the filename of the cell. Typically
|
|
|
the value returned by ip.compile.cache(cell).
|
|
|
interactivity : str
|
|
|
'all', 'last', 'last_expr' or 'none', specifying which nodes should be
|
|
|
run interactively (displaying output from expressions). 'last_expr'
|
|
|
will run the last node interactively only if it is an expression (i.e.
|
|
|
expressions in loops or other blocks are not displayed. Other values
|
|
|
for this parameter will raise a ValueError.
|
|
|
compiler : callable
|
|
|
A function with the same interface as the built-in compile(), to turn
|
|
|
the AST nodes into code objects. Default is the built-in compile().
|
|
|
result : ExecutionResult, optional
|
|
|
An object to store exceptions that occur during execution.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
True if an exception occurred while running code, False if it finished
|
|
|
running.
|
|
|
"""
|
|
|
if not nodelist:
|
|
|
return
|
|
|
|
|
|
if interactivity == 'last_expr':
|
|
|
if isinstance(nodelist[-1], ast.Expr):
|
|
|
interactivity = "last"
|
|
|
else:
|
|
|
interactivity = "none"
|
|
|
|
|
|
if interactivity == 'none':
|
|
|
to_run_exec, to_run_interactive = nodelist, []
|
|
|
elif interactivity == 'last':
|
|
|
to_run_exec, to_run_interactive = nodelist[:-1], nodelist[-1:]
|
|
|
elif interactivity == 'all':
|
|
|
to_run_exec, to_run_interactive = [], nodelist
|
|
|
else:
|
|
|
raise ValueError("Interactivity was %r" % interactivity)
|
|
|
|
|
|
exec_count = self.execution_count
|
|
|
|
|
|
try:
|
|
|
for i, node in enumerate(to_run_exec):
|
|
|
mod = ast.Module([node])
|
|
|
code = compiler(mod, cell_name, "exec")
|
|
|
if self.run_code(code, result):
|
|
|
return True
|
|
|
|
|
|
for i, node in enumerate(to_run_interactive):
|
|
|
mod = ast.Interactive([node])
|
|
|
code = compiler(mod, cell_name, "single")
|
|
|
if self.run_code(code, result):
|
|
|
return True
|
|
|
|
|
|
# Flush softspace
|
|
|
if softspace(sys.stdout, 0):
|
|
|
print()
|
|
|
|
|
|
except:
|
|
|
# It's possible to have exceptions raised here, typically by
|
|
|
# compilation of odd code (such as a naked 'return' outside a
|
|
|
# function) that did parse but isn't valid. Typically the exception
|
|
|
# is a SyntaxError, but it's safest just to catch anything and show
|
|
|
# the user a traceback.
|
|
|
|
|
|
# We do only one try/except outside the loop to minimize the impact
|
|
|
# on runtime, and also because if any node in the node list is
|
|
|
# broken, we should stop execution completely.
|
|
|
if result:
|
|
|
result.error_before_exec = sys.exc_info()[1]
|
|
|
self.showtraceback()
|
|
|
return True
|
|
|
|
|
|
return False
|
|
|
|
|
|
def run_code(self, code_obj, result=None):
|
|
|
"""Execute a code object.
|
|
|
|
|
|
When an exception occurs, self.showtraceback() is called to display a
|
|
|
traceback.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
code_obj : code object
|
|
|
A compiled code object, to be executed
|
|
|
result : ExecutionResult, optional
|
|
|
An object to store exceptions that occur during execution.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
False : successful execution.
|
|
|
True : 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:
|
|
|
self.hooks.pre_run_code_hook()
|
|
|
#rprint('Running code', repr(code_obj)) # dbg
|
|
|
exec(code_obj, self.user_global_ns, self.user_ns)
|
|
|
finally:
|
|
|
# Reset our crash handler in place
|
|
|
sys.excepthook = old_excepthook
|
|
|
except SystemExit as e:
|
|
|
if result is not None:
|
|
|
result.error_in_exec = e
|
|
|
self.showtraceback(exception_only=True)
|
|
|
warn("To exit: use 'exit', 'quit', or Ctrl-D.", level=1)
|
|
|
except self.custom_exceptions:
|
|
|
etype, value, tb = sys.exc_info()
|
|
|
if result is not None:
|
|
|
result.error_in_exec = value
|
|
|
self.CustomTB(etype, value, tb)
|
|
|
except:
|
|
|
if result is not None:
|
|
|
result.error_in_exec = sys.exc_info()[1]
|
|
|
self.showtraceback()
|
|
|
else:
|
|
|
outflag = 0
|
|
|
return outflag
|
|
|
|
|
|
# For backwards compatibility
|
|
|
runcode = run_code
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to GUI support and pylab
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def enable_gui(self, gui=None):
|
|
|
raise NotImplementedError('Implement enable_gui in a subclass')
|
|
|
|
|
|
def enable_matplotlib(self, gui=None):
|
|
|
"""Enable interactive matplotlib and inline figure support.
|
|
|
|
|
|
This takes the following steps:
|
|
|
|
|
|
1. select the appropriate eventloop and matplotlib backend
|
|
|
2. set up matplotlib for interactive use with that backend
|
|
|
3. configure formatters for inline figure display
|
|
|
4. enable the selected gui eventloop
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
gui : optional, string
|
|
|
If given, dictates the choice of matplotlib GUI backend to use
|
|
|
(should be one of IPython's supported backends, 'qt', 'osx', 'tk',
|
|
|
'gtk', 'wx' or 'inline'), otherwise we use the default chosen by
|
|
|
matplotlib (as dictated by the matplotlib build-time options plus the
|
|
|
user's matplotlibrc configuration file). Note that not all backends
|
|
|
make sense in all contexts, for example a terminal ipython can't
|
|
|
display figures inline.
|
|
|
"""
|
|
|
from IPython.core import pylabtools as pt
|
|
|
gui, backend = pt.find_gui_and_backend(gui, self.pylab_gui_select)
|
|
|
|
|
|
if gui != 'inline':
|
|
|
# If we have our first gui selection, store it
|
|
|
if self.pylab_gui_select is None:
|
|
|
self.pylab_gui_select = gui
|
|
|
# Otherwise if they are different
|
|
|
elif gui != self.pylab_gui_select:
|
|
|
print ('Warning: Cannot change to a different GUI toolkit: %s.'
|
|
|
' Using %s instead.' % (gui, self.pylab_gui_select))
|
|
|
gui, backend = pt.find_gui_and_backend(self.pylab_gui_select)
|
|
|
|
|
|
pt.activate_matplotlib(backend)
|
|
|
pt.configure_inline_support(self, backend)
|
|
|
|
|
|
# Now we must activate the gui pylab wants to use, and fix %run to take
|
|
|
# plot updates into account
|
|
|
self.enable_gui(gui)
|
|
|
self.magics_manager.registry['ExecutionMagics'].default_runner = \
|
|
|
pt.mpl_runner(self.safe_execfile)
|
|
|
|
|
|
return gui, backend
|
|
|
|
|
|
def enable_pylab(self, gui=None, import_all=True, welcome_message=False):
|
|
|
"""Activate pylab support at runtime.
|
|
|
|
|
|
This turns on support for matplotlib, preloads into the interactive
|
|
|
namespace all of numpy and pylab, and configures IPython to correctly
|
|
|
interact with the GUI event loop. The GUI backend to be used can be
|
|
|
optionally selected with the optional ``gui`` argument.
|
|
|
|
|
|
This method only adds preloading the namespace to InteractiveShell.enable_matplotlib.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
gui : optional, string
|
|
|
If given, dictates the choice of matplotlib GUI backend to use
|
|
|
(should be one of IPython's supported backends, 'qt', 'osx', 'tk',
|
|
|
'gtk', 'wx' or 'inline'), otherwise we use the default chosen by
|
|
|
matplotlib (as dictated by the matplotlib build-time options plus the
|
|
|
user's matplotlibrc configuration file). Note that not all backends
|
|
|
make sense in all contexts, for example a terminal ipython can't
|
|
|
display figures inline.
|
|
|
import_all : optional, bool, default: True
|
|
|
Whether to do `from numpy import *` and `from pylab import *`
|
|
|
in addition to module imports.
|
|
|
welcome_message : deprecated
|
|
|
This argument is ignored, no welcome message will be displayed.
|
|
|
"""
|
|
|
from IPython.core.pylabtools import import_pylab
|
|
|
|
|
|
gui, backend = self.enable_matplotlib(gui)
|
|
|
|
|
|
# We want to prevent the loading of pylab to pollute the user's
|
|
|
# namespace as shown by the %who* magics, so we execute the activation
|
|
|
# code in an empty namespace, and we update *both* user_ns and
|
|
|
# user_ns_hidden with this information.
|
|
|
ns = {}
|
|
|
import_pylab(ns, import_all)
|
|
|
# warn about clobbered names
|
|
|
ignored = set(["__builtins__"])
|
|
|
both = set(ns).intersection(self.user_ns).difference(ignored)
|
|
|
clobbered = [ name for name in both if self.user_ns[name] is not ns[name] ]
|
|
|
self.user_ns.update(ns)
|
|
|
self.user_ns_hidden.update(ns)
|
|
|
return gui, backend, clobbered
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Utilities
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def var_expand(self, cmd, depth=0, formatter=DollarFormatter()):
|
|
|
"""Expand python variables in a string.
|
|
|
|
|
|
The depth argument indicates how many frames above the caller should
|
|
|
be walked to look for the local namespace where to expand variables.
|
|
|
|
|
|
The global namespace for expansion is always the user's interactive
|
|
|
namespace.
|
|
|
"""
|
|
|
ns = self.user_ns.copy()
|
|
|
try:
|
|
|
frame = sys._getframe(depth+1)
|
|
|
except ValueError:
|
|
|
# This is thrown if there aren't that many frames on the stack,
|
|
|
# e.g. if a script called run_line_magic() directly.
|
|
|
pass
|
|
|
else:
|
|
|
ns.update(frame.f_locals)
|
|
|
|
|
|
try:
|
|
|
# We have to use .vformat() here, because 'self' is a valid and common
|
|
|
# name, and expanding **ns for .format() would make it collide with
|
|
|
# the 'self' argument of the method.
|
|
|
cmd = formatter.vformat(cmd, args=[], kwargs=ns)
|
|
|
except Exception:
|
|
|
# if formatter couldn't format, just let it go untransformed
|
|
|
pass
|
|
|
return cmd
|
|
|
|
|
|
def mktempfile(self, data=None, prefix='ipython_edit_'):
|
|
|
"""Make a new tempfile and return its filename.
|
|
|
|
|
|
This makes a call to tempfile.mkstemp (created in a tempfile.mkdtemp),
|
|
|
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."""
|
|
|
|
|
|
dirname = tempfile.mkdtemp(prefix=prefix)
|
|
|
self.tempdirs.append(dirname)
|
|
|
|
|
|
handle, filename = tempfile.mkstemp('.py', prefix, dir=dirname)
|
|
|
os.close(handle) # On Windows, there can only be one open handle on a file
|
|
|
self.tempfiles.append(filename)
|
|
|
|
|
|
if data:
|
|
|
tmp_file = open(filename,'w')
|
|
|
tmp_file.write(data)
|
|
|
tmp_file.close()
|
|
|
return filename
|
|
|
|
|
|
# TODO: This should be removed when Term is refactored.
|
|
|
def write(self,data):
|
|
|
"""Write a string to the default output"""
|
|
|
io.stdout.write(data)
|
|
|
|
|
|
# TODO: This should be removed when Term is refactored.
|
|
|
def write_err(self,data):
|
|
|
"""Write a string to the default error output"""
|
|
|
io.stderr.write(data)
|
|
|
|
|
|
def ask_yes_no(self, prompt, default=None):
|
|
|
if self.quiet:
|
|
|
return True
|
|
|
return ask_yes_no(prompt,default)
|
|
|
|
|
|
def show_usage(self):
|
|
|
"""Show a usage message"""
|
|
|
page.page(IPython.core.usage.interactive_usage)
|
|
|
|
|
|
def extract_input_lines(self, range_str, raw=False):
|
|
|
"""Return as a string a set of input history slices.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
range_str : string
|
|
|
The set of slices is given as a string, like "~5/6-~4/2 4:8 9",
|
|
|
since this function is for use by magic functions which get their
|
|
|
arguments as strings. The number before the / is the session
|
|
|
number: ~n goes n back from the current session.
|
|
|
|
|
|
raw : bool, optional
|
|
|
By default, the processed input is used. If this is true, the raw
|
|
|
input history is used instead.
|
|
|
|
|
|
Notes
|
|
|
-----
|
|
|
|
|
|
Slices can be described with two notations:
|
|
|
|
|
|
* ``N:M`` -> standard python form, means including items N...(M-1).
|
|
|
* ``N-M`` -> include items N..M (closed endpoint).
|
|
|
"""
|
|
|
lines = self.history_manager.get_range_by_str(range_str, raw=raw)
|
|
|
return "\n".join(x for _, _, x in lines)
|
|
|
|
|
|
def find_user_code(self, target, raw=True, py_only=False, skip_encoding_cookie=True, search_ns=False):
|
|
|
"""Get a code string from history, file, url, or a string or macro.
|
|
|
|
|
|
This is mainly used by magic functions.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
|
|
|
target : str
|
|
|
|
|
|
A string specifying code to retrieve. This will be tried respectively
|
|
|
as: ranges of input history (see %history for syntax), url,
|
|
|
correspnding .py file, filename, or an expression evaluating to a
|
|
|
string or Macro in the user namespace.
|
|
|
|
|
|
raw : bool
|
|
|
If true (default), retrieve raw history. Has no effect on the other
|
|
|
retrieval mechanisms.
|
|
|
|
|
|
py_only : bool (default False)
|
|
|
Only try to fetch python code, do not try alternative methods to decode file
|
|
|
if unicode fails.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
A string of code.
|
|
|
|
|
|
ValueError is raised if nothing is found, and TypeError if it evaluates
|
|
|
to an object of another type. In each case, .args[0] is a printable
|
|
|
message.
|
|
|
"""
|
|
|
code = self.extract_input_lines(target, raw=raw) # Grab history
|
|
|
if code:
|
|
|
return code
|
|
|
utarget = unquote_filename(target)
|
|
|
try:
|
|
|
if utarget.startswith(('http://', 'https://')):
|
|
|
return openpy.read_py_url(utarget, skip_encoding_cookie=skip_encoding_cookie)
|
|
|
except UnicodeDecodeError:
|
|
|
if not py_only :
|
|
|
# Deferred import
|
|
|
try:
|
|
|
from urllib.request import urlopen # Py3
|
|
|
except ImportError:
|
|
|
from urllib import urlopen
|
|
|
response = urlopen(target)
|
|
|
return response.read().decode('latin1')
|
|
|
raise ValueError(("'%s' seem to be unreadable.") % utarget)
|
|
|
|
|
|
potential_target = [target]
|
|
|
try :
|
|
|
potential_target.insert(0,get_py_filename(target))
|
|
|
except IOError:
|
|
|
pass
|
|
|
|
|
|
for tgt in potential_target :
|
|
|
if os.path.isfile(tgt): # Read file
|
|
|
try :
|
|
|
return openpy.read_py_file(tgt, skip_encoding_cookie=skip_encoding_cookie)
|
|
|
except UnicodeDecodeError :
|
|
|
if not py_only :
|
|
|
with io_open(tgt,'r', encoding='latin1') as f :
|
|
|
return f.read()
|
|
|
raise ValueError(("'%s' seem to be unreadable.") % target)
|
|
|
elif os.path.isdir(os.path.expanduser(tgt)):
|
|
|
raise ValueError("'%s' is a directory, not a regular file." % target)
|
|
|
|
|
|
if search_ns:
|
|
|
# Inspect namespace to load object source
|
|
|
object_info = self.object_inspect(target, detail_level=1)
|
|
|
if object_info['found'] and object_info['source']:
|
|
|
return object_info['source']
|
|
|
|
|
|
try: # User namespace
|
|
|
codeobj = eval(target, self.user_ns)
|
|
|
except Exception:
|
|
|
raise ValueError(("'%s' was not found in history, as a file, url, "
|
|
|
"nor in the user namespace.") % target)
|
|
|
|
|
|
if isinstance(codeobj, string_types):
|
|
|
return codeobj
|
|
|
elif isinstance(codeobj, Macro):
|
|
|
return codeobj.value
|
|
|
|
|
|
raise TypeError("%s is neither a string nor a macro." % target,
|
|
|
codeobj)
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to IPython exiting
|
|
|
#-------------------------------------------------------------------------
|
|
|
def atexit_operations(self):
|
|
|
"""This will be executed at the time of exit.
|
|
|
|
|
|
Cleanup operations and saving of persistent data that is done
|
|
|
unconditionally by IPython should be performed here.
|
|
|
|
|
|
For things that may depend on startup flags or platform specifics (such
|
|
|
as having readline or not), register a separate atexit function in the
|
|
|
code that has the appropriate information, rather than trying to
|
|
|
clutter
|
|
|
"""
|
|
|
# Close the history session (this stores the end time and line count)
|
|
|
# this must be *before* the tempfile cleanup, in case of temporary
|
|
|
# history db
|
|
|
self.history_manager.end_session()
|
|
|
|
|
|
# Cleanup all tempfiles and folders left around
|
|
|
for tfile in self.tempfiles:
|
|
|
try:
|
|
|
os.unlink(tfile)
|
|
|
except OSError:
|
|
|
pass
|
|
|
|
|
|
for tdir in self.tempdirs:
|
|
|
try:
|
|
|
os.rmdir(tdir)
|
|
|
except OSError:
|
|
|
pass
|
|
|
|
|
|
# Clear all user namespaces to release all references cleanly.
|
|
|
self.reset(new_session=False)
|
|
|
|
|
|
# Run user hooks
|
|
|
self.hooks.shutdown_hook()
|
|
|
|
|
|
def cleanup(self):
|
|
|
self.restore_sys_module_state()
|
|
|
|
|
|
|
|
|
class InteractiveShellABC(with_metaclass(abc.ABCMeta, object)):
|
|
|
"""An abstract base class for InteractiveShell."""
|
|
|
|
|
|
InteractiveShellABC.register(InteractiveShell)
|
|
|
|
