|
|
# encoding: utf-8
|
|
|
"""
|
|
|
An embedded IPython shell.
|
|
|
|
|
|
Authors:
|
|
|
|
|
|
* Brian Granger
|
|
|
* Fernando Perez
|
|
|
|
|
|
Notes
|
|
|
-----
|
|
|
"""
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (C) 2008-2011 The IPython Development Team
|
|
|
#
|
|
|
# Distributed under the terms of the BSD License. The full license is in
|
|
|
# the file COPYING, distributed as part of this software.
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
from __future__ import with_statement
|
|
|
import __main__
|
|
|
|
|
|
import sys
|
|
|
try:
|
|
|
from contextlib import nested
|
|
|
except:
|
|
|
from IPython.utils.nested_context import nested
|
|
|
import warnings
|
|
|
|
|
|
from IPython.core import ultratb
|
|
|
from IPython.frontend.terminal.interactiveshell import TerminalInteractiveShell
|
|
|
from IPython.frontend.terminal.ipapp import load_default_config
|
|
|
|
|
|
from IPython.utils.traitlets import Bool, CBool, Unicode
|
|
|
from IPython.utils.io import ask_yes_no
|
|
|
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Classes and functions
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
# This is an additional magic that is exposed in embedded shells.
|
|
|
def kill_embedded(self,parameter_s=''):
|
|
|
"""%kill_embedded : deactivate for good the current embedded IPython.
|
|
|
|
|
|
This function (after asking for confirmation) sets an internal flag so that
|
|
|
an embedded IPython will never activate again. This is useful to
|
|
|
permanently disable a shell that is being called inside a loop: once you've
|
|
|
figured out what you needed from it, you may then kill it and the program
|
|
|
will then continue to run without the interactive shell interfering again.
|
|
|
"""
|
|
|
|
|
|
kill = ask_yes_no("Are you sure you want to kill this embedded instance "
|
|
|
"(y/n)? [y/N] ",'n')
|
|
|
if kill:
|
|
|
self.embedded_active = False
|
|
|
print "This embedded IPython will not reactivate anymore once you exit."
|
|
|
|
|
|
|
|
|
class InteractiveShellEmbed(TerminalInteractiveShell):
|
|
|
|
|
|
dummy_mode = Bool(False)
|
|
|
exit_msg = Unicode('')
|
|
|
embedded = CBool(True)
|
|
|
embedded_active = CBool(True)
|
|
|
# Like the base class display_banner is not configurable, but here it
|
|
|
# is True by default.
|
|
|
display_banner = CBool(True)
|
|
|
|
|
|
def __init__(self, config=None, ipython_dir=None, user_ns=None,
|
|
|
user_module=None, custom_exceptions=((),None),
|
|
|
usage=None, banner1=None, banner2=None,
|
|
|
display_banner=None, exit_msg=u'', user_global_ns=None):
|
|
|
|
|
|
if user_global_ns is not None:
|
|
|
warnings.warn("user_global_ns has been replaced by user_module. The\
|
|
|
parameter will be ignored.", DeprecationWarning)
|
|
|
|
|
|
super(InteractiveShellEmbed,self).__init__(
|
|
|
config=config, ipython_dir=ipython_dir, user_ns=user_ns,
|
|
|
user_module=user_module, custom_exceptions=custom_exceptions,
|
|
|
usage=usage, banner1=banner1, banner2=banner2,
|
|
|
display_banner=display_banner
|
|
|
)
|
|
|
|
|
|
self.exit_msg = exit_msg
|
|
|
self.define_magic("kill_embedded", kill_embedded)
|
|
|
|
|
|
# don't use the ipython crash handler so that user exceptions aren't
|
|
|
# trapped
|
|
|
sys.excepthook = ultratb.FormattedTB(color_scheme=self.colors,
|
|
|
mode=self.xmode,
|
|
|
call_pdb=self.pdb)
|
|
|
|
|
|
def init_sys_modules(self):
|
|
|
pass
|
|
|
|
|
|
def __call__(self, header='', local_ns=None, module=None, dummy=None,
|
|
|
stack_depth=1, global_ns=None):
|
|
|
"""Activate the interactive interpreter.
|
|
|
|
|
|
__call__(self,header='',local_ns=None,module=None,dummy=None) -> Start
|
|
|
the interpreter shell with the given local and global namespaces, and
|
|
|
optionally print a header string at startup.
|
|
|
|
|
|
The shell can be globally activated/deactivated using the
|
|
|
dummy_mode attribute. This allows you to turn off a shell used
|
|
|
for debugging globally.
|
|
|
|
|
|
However, *each* time you call the shell you can override the current
|
|
|
state of dummy_mode with the optional keyword parameter 'dummy'. For
|
|
|
example, if you set dummy mode on with IPShell.dummy_mode = True, you
|
|
|
can still have a specific call work by making it as IPShell(dummy=False).
|
|
|
"""
|
|
|
|
|
|
# If the user has turned it off, go away
|
|
|
if not self.embedded_active:
|
|
|
return
|
|
|
|
|
|
# Normal exits from interactive mode set this flag, so the shell can't
|
|
|
# re-enter (it checks this variable at the start of interactive mode).
|
|
|
self.exit_now = False
|
|
|
|
|
|
# Allow the dummy parameter to override the global __dummy_mode
|
|
|
if dummy or (dummy != 0 and self.dummy_mode):
|
|
|
return
|
|
|
|
|
|
if self.has_readline:
|
|
|
self.set_readline_completer()
|
|
|
|
|
|
# self.banner is auto computed
|
|
|
if header:
|
|
|
self.old_banner2 = self.banner2
|
|
|
self.banner2 = self.banner2 + '\n' + header + '\n'
|
|
|
else:
|
|
|
self.old_banner2 = ''
|
|
|
|
|
|
# Call the embedding code with a stack depth of 1 so it can skip over
|
|
|
# our call and get the original caller's namespaces.
|
|
|
self.mainloop(local_ns, module, stack_depth=stack_depth, global_ns=global_ns)
|
|
|
|
|
|
self.banner2 = self.old_banner2
|
|
|
|
|
|
if self.exit_msg is not None:
|
|
|
print self.exit_msg
|
|
|
|
|
|
def mainloop(self, local_ns=None, module=None, stack_depth=0,
|
|
|
display_banner=None, global_ns=None):
|
|
|
"""Embeds IPython into a running python program.
|
|
|
|
|
|
Input:
|
|
|
|
|
|
- header: An optional header message can be specified.
|
|
|
|
|
|
- local_ns, module: working local namespace (a dict) and module (a
|
|
|
module or similar object). If given as None, they are automatically
|
|
|
taken from the scope where the shell was called, so that
|
|
|
program variables become visible.
|
|
|
|
|
|
- stack_depth: specifies how many levels in the stack to go to
|
|
|
looking for namespaces (when local_ns or module is None). This
|
|
|
allows an intermediate caller to make sure that this function gets
|
|
|
the namespace from the intended level in the stack. By default (0)
|
|
|
it will get its locals and globals from the immediate caller.
|
|
|
|
|
|
Warning: it's possible to use this in a program which is being run by
|
|
|
IPython itself (via %run), but some funny things will happen (a few
|
|
|
globals get overwritten). In the future this will be cleaned up, as
|
|
|
there is no fundamental reason why it can't work perfectly."""
|
|
|
|
|
|
if (global_ns is not None) and (module is None):
|
|
|
class DummyMod(object):
|
|
|
"""A dummy module object for embedded IPython."""
|
|
|
pass
|
|
|
warnings.warn("global_ns is deprecated, use module instead.", DeprecationWarning)
|
|
|
module = DummyMod()
|
|
|
module.__dict__ = global_ns
|
|
|
|
|
|
# Get locals and globals from caller
|
|
|
if (local_ns is None or module is None) and self.default_user_namespaces:
|
|
|
call_frame = sys._getframe(stack_depth).f_back
|
|
|
|
|
|
if local_ns is None:
|
|
|
local_ns = call_frame.f_locals
|
|
|
if module is None:
|
|
|
global_ns = call_frame.f_globals
|
|
|
module = sys.modules[global_ns['__name__']]
|
|
|
|
|
|
# Save original namespace and module so we can restore them after
|
|
|
# embedding; otherwise the shell doesn't shut down correctly.
|
|
|
orig_user_module = self.user_module
|
|
|
orig_user_ns = self.user_ns
|
|
|
|
|
|
# Update namespaces and fire up interpreter
|
|
|
|
|
|
# The global one is easy, we can just throw it in
|
|
|
if module is not None:
|
|
|
self.user_module = module
|
|
|
|
|
|
# But the user/local one is tricky: ipython needs it to store internal
|
|
|
# data, but we also need the locals. We'll throw our hidden variables
|
|
|
# like _ih and get_ipython() into the local namespace, but delete them
|
|
|
# later.
|
|
|
if local_ns is not None:
|
|
|
self.user_ns = local_ns
|
|
|
self.init_user_ns()
|
|
|
|
|
|
# Patch for global embedding to make sure that things don't overwrite
|
|
|
# user globals accidentally. Thanks to Richard <rxe@renre-europe.com>
|
|
|
# FIXME. Test this a bit more carefully (the if.. is new)
|
|
|
# N.B. This can't now ever be called. Not sure what it was for.
|
|
|
# And now, since it wasn't called in the previous version, I'm
|
|
|
# commenting out these lines so they can't be called with my new changes
|
|
|
# --TK, 2011-12-10
|
|
|
#if local_ns is None and module is None:
|
|
|
# self.user_global_ns.update(__main__.__dict__)
|
|
|
|
|
|
# make sure the tab-completer has the correct frame information, so it
|
|
|
# actually completes using the frame's locals/globals
|
|
|
self.set_completer_frame()
|
|
|
|
|
|
with nested(self.builtin_trap, self.display_trap):
|
|
|
self.interact(display_banner=display_banner)
|
|
|
|
|
|
# now, purge out the local namespace of IPython's hidden variables.
|
|
|
if local_ns is not None:
|
|
|
for name in self.user_ns_hidden:
|
|
|
local_ns.pop(name, None)
|
|
|
|
|
|
# Restore original namespace so shell can shut down when we exit.
|
|
|
self.user_module = orig_user_module
|
|
|
self.user_ns = orig_user_ns
|
|
|
|
|
|
_embedded_shell = None
|
|
|
|
|
|
|
|
|
def embed(**kwargs):
|
|
|
"""Call this to embed IPython at the current point in your program.
|
|
|
|
|
|
The first invocation of this will create an :class:`InteractiveShellEmbed`
|
|
|
instance and then call it. Consecutive calls just call the already
|
|
|
created instance.
|
|
|
|
|
|
Here is a simple example::
|
|
|
|
|
|
from IPython import embed
|
|
|
a = 10
|
|
|
b = 20
|
|
|
embed('First time')
|
|
|
c = 30
|
|
|
d = 40
|
|
|
embed
|
|
|
|
|
|
Full customization can be done by passing a :class:`Struct` in as the
|
|
|
config argument.
|
|
|
"""
|
|
|
config = kwargs.get('config')
|
|
|
header = kwargs.pop('header', u'')
|
|
|
if config is None:
|
|
|
config = load_default_config()
|
|
|
config.InteractiveShellEmbed = config.TerminalInteractiveShell
|
|
|
kwargs['config'] = config
|
|
|
global _embedded_shell
|
|
|
if _embedded_shell is None:
|
|
|
_embedded_shell = InteractiveShellEmbed(**kwargs)
|
|
|
_embedded_shell(header=header, stack_depth=2)
|
|
|
|
