|
|
# encoding: utf-8
|
|
|
"""
|
|
|
A mixin for :class:`~IPython.core.application.Application` classes that
|
|
|
launch InteractiveShell instances, load extensions, etc.
|
|
|
"""
|
|
|
|
|
|
# Copyright (c) IPython Development Team.
|
|
|
# Distributed under the terms of the Modified BSD License.
|
|
|
|
|
|
from __future__ import absolute_import
|
|
|
from __future__ import print_function
|
|
|
|
|
|
import glob
|
|
|
import os
|
|
|
import sys
|
|
|
|
|
|
from traitlets.config.application import boolean_flag
|
|
|
from traitlets.config.configurable import Configurable
|
|
|
from traitlets.config.loader import Config
|
|
|
from IPython.core import pylabtools
|
|
|
from IPython.utils import py3compat
|
|
|
from IPython.utils.contexts import preserve_keys
|
|
|
from IPython.utils.path import filefind
|
|
|
from traitlets import (
|
|
|
Unicode, Instance, List, Bool, CaselessStrEnum
|
|
|
)
|
|
|
from IPython.lib.inputhook import guis
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Aliases and Flags
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
gui_keys = tuple(sorted([ key for key in guis if key is not None ]))
|
|
|
|
|
|
backend_keys = sorted(pylabtools.backends.keys())
|
|
|
backend_keys.insert(0, 'auto')
|
|
|
|
|
|
shell_flags = {}
|
|
|
|
|
|
addflag = lambda *args: shell_flags.update(boolean_flag(*args))
|
|
|
addflag('autoindent', 'InteractiveShell.autoindent',
|
|
|
'Turn on autoindenting.', 'Turn off autoindenting.'
|
|
|
)
|
|
|
addflag('automagic', 'InteractiveShell.automagic',
|
|
|
"""Turn on the auto calling of magic commands. Type %%magic at the
|
|
|
IPython prompt for more information.""",
|
|
|
'Turn off the auto calling of magic commands.'
|
|
|
)
|
|
|
addflag('pdb', 'InteractiveShell.pdb',
|
|
|
"Enable auto calling the pdb debugger after every exception.",
|
|
|
"Disable auto calling the pdb debugger after every exception."
|
|
|
)
|
|
|
# pydb flag doesn't do any config, as core.debugger switches on import,
|
|
|
# which is before parsing. This just allows the flag to be passed.
|
|
|
shell_flags.update(dict(
|
|
|
pydb = ({},
|
|
|
"""Use the third party 'pydb' package as debugger, instead of pdb.
|
|
|
Requires that pydb is installed."""
|
|
|
)
|
|
|
))
|
|
|
addflag('pprint', 'PlainTextFormatter.pprint',
|
|
|
"Enable auto pretty printing of results.",
|
|
|
"Disable auto pretty printing of results."
|
|
|
)
|
|
|
addflag('color-info', 'InteractiveShell.color_info',
|
|
|
"""IPython can display information about objects via a set of functions,
|
|
|
and optionally can use colors for this, syntax highlighting
|
|
|
source code and various other elements. This is on by default, but can cause
|
|
|
problems with some pagers. If you see such problems, you can disable the
|
|
|
colours.""",
|
|
|
"Disable using colors for info related things."
|
|
|
)
|
|
|
addflag('deep-reload', 'InteractiveShell.deep_reload',
|
|
|
""" **Deprecated** Enable deep (recursive) reloading by default. IPython can use the
|
|
|
deep_reload module which reloads changes in modules recursively (it
|
|
|
replaces the reload() function, so you don't need to change anything to
|
|
|
use it). deep_reload() forces a full reload of modules whose code may
|
|
|
have changed, which the default reload() function does not. When
|
|
|
deep_reload is off, IPython will use the normal reload(), but
|
|
|
deep_reload will still be available as dreload(). This feature is off
|
|
|
by default [which means that you have both normal reload() and
|
|
|
dreload()].""",
|
|
|
"Disable deep (recursive) reloading by default."
|
|
|
)
|
|
|
nosep_config = Config()
|
|
|
nosep_config.InteractiveShell.separate_in = ''
|
|
|
nosep_config.InteractiveShell.separate_out = ''
|
|
|
nosep_config.InteractiveShell.separate_out2 = ''
|
|
|
|
|
|
shell_flags['nosep']=(nosep_config, "Eliminate all spacing between prompts.")
|
|
|
shell_flags['pylab'] = (
|
|
|
{'InteractiveShellApp' : {'pylab' : 'auto'}},
|
|
|
"""Pre-load matplotlib and numpy for interactive use with
|
|
|
the default matplotlib backend."""
|
|
|
)
|
|
|
shell_flags['matplotlib'] = (
|
|
|
{'InteractiveShellApp' : {'matplotlib' : 'auto'}},
|
|
|
"""Configure matplotlib for interactive use with
|
|
|
the default matplotlib backend."""
|
|
|
)
|
|
|
|
|
|
# it's possible we don't want short aliases for *all* of these:
|
|
|
shell_aliases = dict(
|
|
|
autocall='InteractiveShell.autocall',
|
|
|
colors='InteractiveShell.colors',
|
|
|
logfile='InteractiveShell.logfile',
|
|
|
logappend='InteractiveShell.logappend',
|
|
|
c='InteractiveShellApp.code_to_run',
|
|
|
m='InteractiveShellApp.module_to_run',
|
|
|
ext='InteractiveShellApp.extra_extension',
|
|
|
gui='InteractiveShellApp.gui',
|
|
|
pylab='InteractiveShellApp.pylab',
|
|
|
matplotlib='InteractiveShellApp.matplotlib',
|
|
|
)
|
|
|
shell_aliases['cache-size'] = 'InteractiveShell.cache_size'
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Main classes and functions
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
class InteractiveShellApp(Configurable):
|
|
|
"""A Mixin for applications that start InteractiveShell instances.
|
|
|
|
|
|
Provides configurables for loading extensions and executing files
|
|
|
as part of configuring a Shell environment.
|
|
|
|
|
|
The following methods should be called by the :meth:`initialize` method
|
|
|
of the subclass:
|
|
|
|
|
|
- :meth:`init_path`
|
|
|
- :meth:`init_shell` (to be implemented by the subclass)
|
|
|
- :meth:`init_gui_pylab`
|
|
|
- :meth:`init_extensions`
|
|
|
- :meth:`init_code`
|
|
|
"""
|
|
|
extensions = List(Unicode(), config=True,
|
|
|
help="A list of dotted module names of IPython extensions to load."
|
|
|
)
|
|
|
extra_extension = Unicode('', config=True,
|
|
|
help="dotted module name of an IPython extension to load."
|
|
|
)
|
|
|
|
|
|
reraise_ipython_extension_failures = Bool(
|
|
|
False,
|
|
|
config=True,
|
|
|
help="Reraise exceptions encountered loading IPython extensions?",
|
|
|
)
|
|
|
|
|
|
# Extensions that are always loaded (not configurable)
|
|
|
default_extensions = List(Unicode(), [u'storemagic'], config=False)
|
|
|
|
|
|
hide_initial_ns = Bool(True, config=True,
|
|
|
help="""Should variables loaded at startup (by startup files, exec_lines, etc.)
|
|
|
be hidden from tools like %who?"""
|
|
|
)
|
|
|
|
|
|
exec_files = List(Unicode(), config=True,
|
|
|
help="""List of files to run at IPython startup."""
|
|
|
)
|
|
|
exec_PYTHONSTARTUP = Bool(True, config=True,
|
|
|
help="""Run the file referenced by the PYTHONSTARTUP environment
|
|
|
variable at IPython startup."""
|
|
|
)
|
|
|
file_to_run = Unicode('', config=True,
|
|
|
help="""A file to be run""")
|
|
|
|
|
|
exec_lines = List(Unicode(), config=True,
|
|
|
help="""lines of code to run at IPython startup."""
|
|
|
)
|
|
|
code_to_run = Unicode('', config=True,
|
|
|
help="Execute the given command string."
|
|
|
)
|
|
|
module_to_run = Unicode('', config=True,
|
|
|
help="Run the module as a script."
|
|
|
)
|
|
|
gui = CaselessStrEnum(gui_keys, config=True, allow_none=True,
|
|
|
help="Enable GUI event loop integration with any of {0}.".format(gui_keys)
|
|
|
)
|
|
|
matplotlib = CaselessStrEnum(backend_keys, allow_none=True,
|
|
|
config=True,
|
|
|
help="""Configure matplotlib for interactive use with
|
|
|
the default matplotlib backend."""
|
|
|
)
|
|
|
pylab = CaselessStrEnum(backend_keys, allow_none=True,
|
|
|
config=True,
|
|
|
help="""Pre-load matplotlib and numpy for interactive use,
|
|
|
selecting a particular matplotlib backend and loop integration.
|
|
|
"""
|
|
|
)
|
|
|
pylab_import_all = Bool(True, config=True,
|
|
|
help="""If true, IPython will populate the user namespace with numpy, pylab, etc.
|
|
|
and an ``import *`` is done from numpy and pylab, when using pylab mode.
|
|
|
|
|
|
When False, pylab mode should not import any names into the user namespace.
|
|
|
"""
|
|
|
)
|
|
|
shell = Instance('IPython.core.interactiveshell.InteractiveShellABC',
|
|
|
allow_none=True)
|
|
|
|
|
|
user_ns = Instance(dict, args=None, allow_none=True)
|
|
|
def _user_ns_changed(self, name, old, new):
|
|
|
if self.shell is not None:
|
|
|
self.shell.user_ns = new
|
|
|
self.shell.init_user_ns()
|
|
|
|
|
|
def init_path(self):
|
|
|
"""Add current working directory, '', to sys.path"""
|
|
|
if sys.path[0] != '':
|
|
|
sys.path.insert(0, '')
|
|
|
|
|
|
def init_shell(self):
|
|
|
raise NotImplementedError("Override in subclasses")
|
|
|
|
|
|
def init_gui_pylab(self):
|
|
|
"""Enable GUI event loop integration, taking pylab into account."""
|
|
|
enable = False
|
|
|
shell = self.shell
|
|
|
if self.pylab:
|
|
|
enable = lambda key: shell.enable_pylab(key, import_all=self.pylab_import_all)
|
|
|
key = self.pylab
|
|
|
elif self.matplotlib:
|
|
|
enable = shell.enable_matplotlib
|
|
|
key = self.matplotlib
|
|
|
elif self.gui:
|
|
|
enable = shell.enable_gui
|
|
|
key = self.gui
|
|
|
|
|
|
if not enable:
|
|
|
return
|
|
|
|
|
|
try:
|
|
|
r = enable(key)
|
|
|
except ImportError:
|
|
|
self.log.warn("Eventloop or matplotlib integration failed. Is matplotlib installed?")
|
|
|
self.shell.showtraceback()
|
|
|
return
|
|
|
except Exception:
|
|
|
self.log.warn("GUI event loop or pylab initialization failed")
|
|
|
self.shell.showtraceback()
|
|
|
return
|
|
|
|
|
|
if isinstance(r, tuple):
|
|
|
gui, backend = r[:2]
|
|
|
self.log.info("Enabling GUI event loop integration, "
|
|
|
"eventloop=%s, matplotlib=%s", gui, backend)
|
|
|
if key == "auto":
|
|
|
print("Using matplotlib backend: %s" % backend)
|
|
|
else:
|
|
|
gui = r
|
|
|
self.log.info("Enabling GUI event loop integration, "
|
|
|
"eventloop=%s", gui)
|
|
|
|
|
|
def init_extensions(self):
|
|
|
"""Load all IPython extensions in IPythonApp.extensions.
|
|
|
|
|
|
This uses the :meth:`ExtensionManager.load_extensions` to load all
|
|
|
the extensions listed in ``self.extensions``.
|
|
|
"""
|
|
|
try:
|
|
|
self.log.debug("Loading IPython extensions...")
|
|
|
extensions = self.default_extensions + self.extensions
|
|
|
if self.extra_extension:
|
|
|
extensions.append(self.extra_extension)
|
|
|
for ext in extensions:
|
|
|
try:
|
|
|
self.log.info("Loading IPython extension: %s" % ext)
|
|
|
self.shell.extension_manager.load_extension(ext)
|
|
|
except:
|
|
|
if self.reraise_ipython_extension_failures:
|
|
|
raise
|
|
|
msg = ("Error in loading extension: {ext}\n"
|
|
|
"Check your config files in {location}".format(
|
|
|
ext=ext,
|
|
|
location=self.profile_dir.location
|
|
|
))
|
|
|
self.log.warn(msg, exc_info=True)
|
|
|
except:
|
|
|
if self.reraise_ipython_extension_failures:
|
|
|
raise
|
|
|
self.log.warn("Unknown error in loading extensions:", exc_info=True)
|
|
|
|
|
|
def init_code(self):
|
|
|
"""run the pre-flight code, specified via exec_lines"""
|
|
|
self._run_startup_files()
|
|
|
self._run_exec_lines()
|
|
|
self._run_exec_files()
|
|
|
|
|
|
# Hide variables defined here from %who etc.
|
|
|
if self.hide_initial_ns:
|
|
|
self.shell.user_ns_hidden.update(self.shell.user_ns)
|
|
|
|
|
|
# command-line execution (ipython -i script.py, ipython -m module)
|
|
|
# should *not* be excluded from %whos
|
|
|
self._run_cmd_line_code()
|
|
|
self._run_module()
|
|
|
|
|
|
# flush output, so itwon't be attached to the first cell
|
|
|
sys.stdout.flush()
|
|
|
sys.stderr.flush()
|
|
|
|
|
|
def _run_exec_lines(self):
|
|
|
"""Run lines of code in IPythonApp.exec_lines in the user's namespace."""
|
|
|
if not self.exec_lines:
|
|
|
return
|
|
|
try:
|
|
|
self.log.debug("Running code from IPythonApp.exec_lines...")
|
|
|
for line in self.exec_lines:
|
|
|
try:
|
|
|
self.log.info("Running code in user namespace: %s" %
|
|
|
line)
|
|
|
self.shell.run_cell(line, store_history=False)
|
|
|
except:
|
|
|
self.log.warn("Error in executing line in user "
|
|
|
"namespace: %s" % line)
|
|
|
self.shell.showtraceback()
|
|
|
except:
|
|
|
self.log.warn("Unknown error in handling IPythonApp.exec_lines:")
|
|
|
self.shell.showtraceback()
|
|
|
|
|
|
def _exec_file(self, fname, shell_futures=False):
|
|
|
try:
|
|
|
full_filename = filefind(fname, [u'.', self.ipython_dir])
|
|
|
except IOError as e:
|
|
|
self.log.warn("File not found: %r"%fname)
|
|
|
return
|
|
|
# Make sure that the running script gets a proper sys.argv as if it
|
|
|
# were run from a system shell.
|
|
|
save_argv = sys.argv
|
|
|
sys.argv = [full_filename] + self.extra_args[1:]
|
|
|
# protect sys.argv from potential unicode strings on Python 2:
|
|
|
if not py3compat.PY3:
|
|
|
sys.argv = [ py3compat.cast_bytes(a) for a in sys.argv ]
|
|
|
try:
|
|
|
if os.path.isfile(full_filename):
|
|
|
self.log.info("Running file in user namespace: %s" %
|
|
|
full_filename)
|
|
|
# Ensure that __file__ is always defined to match Python
|
|
|
# behavior.
|
|
|
with preserve_keys(self.shell.user_ns, '__file__'):
|
|
|
self.shell.user_ns['__file__'] = fname
|
|
|
if full_filename.endswith('.ipy'):
|
|
|
self.shell.safe_execfile_ipy(full_filename,
|
|
|
shell_futures=shell_futures)
|
|
|
else:
|
|
|
# default to python, even without extension
|
|
|
self.shell.safe_execfile(full_filename,
|
|
|
self.shell.user_ns,
|
|
|
shell_futures=shell_futures)
|
|
|
finally:
|
|
|
sys.argv = save_argv
|
|
|
|
|
|
def _run_startup_files(self):
|
|
|
"""Run files from profile startup directory"""
|
|
|
startup_dir = self.profile_dir.startup_dir
|
|
|
startup_files = []
|
|
|
|
|
|
if self.exec_PYTHONSTARTUP and os.environ.get('PYTHONSTARTUP', False) and \
|
|
|
not (self.file_to_run or self.code_to_run or self.module_to_run):
|
|
|
python_startup = os.environ['PYTHONSTARTUP']
|
|
|
self.log.debug("Running PYTHONSTARTUP file %s...", python_startup)
|
|
|
try:
|
|
|
self._exec_file(python_startup)
|
|
|
except:
|
|
|
self.log.warn("Unknown error in handling PYTHONSTARTUP file %s:", python_startup)
|
|
|
self.shell.showtraceback()
|
|
|
finally:
|
|
|
# Many PYTHONSTARTUP files set up the readline completions,
|
|
|
# but this is often at odds with IPython's own completions.
|
|
|
# Do not allow PYTHONSTARTUP to set up readline.
|
|
|
if self.shell.has_readline:
|
|
|
self.shell.set_readline_completer()
|
|
|
|
|
|
startup_files += glob.glob(os.path.join(startup_dir, '*.py'))
|
|
|
startup_files += glob.glob(os.path.join(startup_dir, '*.ipy'))
|
|
|
if not startup_files:
|
|
|
return
|
|
|
|
|
|
self.log.debug("Running startup files from %s...", startup_dir)
|
|
|
try:
|
|
|
for fname in sorted(startup_files):
|
|
|
self._exec_file(fname)
|
|
|
except:
|
|
|
self.log.warn("Unknown error in handling startup files:")
|
|
|
self.shell.showtraceback()
|
|
|
|
|
|
def _run_exec_files(self):
|
|
|
"""Run files from IPythonApp.exec_files"""
|
|
|
if not self.exec_files:
|
|
|
return
|
|
|
|
|
|
self.log.debug("Running files in IPythonApp.exec_files...")
|
|
|
try:
|
|
|
for fname in self.exec_files:
|
|
|
self._exec_file(fname)
|
|
|
except:
|
|
|
self.log.warn("Unknown error in handling IPythonApp.exec_files:")
|
|
|
self.shell.showtraceback()
|
|
|
|
|
|
def _run_cmd_line_code(self):
|
|
|
"""Run code or file specified at the command-line"""
|
|
|
if self.code_to_run:
|
|
|
line = self.code_to_run
|
|
|
try:
|
|
|
self.log.info("Running code given at command line (c=): %s" %
|
|
|
line)
|
|
|
self.shell.run_cell(line, store_history=False)
|
|
|
except:
|
|
|
self.log.warn("Error in executing line in user namespace: %s" %
|
|
|
line)
|
|
|
self.shell.showtraceback()
|
|
|
|
|
|
# Like Python itself, ignore the second if the first of these is present
|
|
|
elif self.file_to_run:
|
|
|
fname = self.file_to_run
|
|
|
try:
|
|
|
self._exec_file(fname, shell_futures=True)
|
|
|
except:
|
|
|
self.log.warn("Error in executing file in user namespace: %s" %
|
|
|
fname)
|
|
|
self.shell.showtraceback()
|
|
|
|
|
|
def _run_module(self):
|
|
|
"""Run module specified at the command-line."""
|
|
|
if self.module_to_run:
|
|
|
# Make sure that the module gets a proper sys.argv as if it were
|
|
|
# run using `python -m`.
|
|
|
save_argv = sys.argv
|
|
|
sys.argv = [sys.executable] + self.extra_args
|
|
|
try:
|
|
|
self.shell.safe_run_module(self.module_to_run,
|
|
|
self.shell.user_ns)
|
|
|
finally:
|
|
|
sys.argv = save_argv
|
|
|
|
