IPython/__init__.py

# encoding: utf-8
"""
IPython: tools for interactive and parallel computing in Python.

http://ipython.org
"""
#-----------------------------------------------------------------------------
#  Copyright (c) 2008-2011, IPython Development Team.
#  Copyright (c) 2001-2007, Fernando Perez <[e-mail]>
#  Copyright (c) 2001, Janko Hauser <[e-mail]>
#  Copyright (c) 2001, Nathaniel Gray <[e-mail]>
#
#  Distributed under the terms of the Modified BSD License.
#
#  The full license is in the file COPYING.txt, distributed with this software.
#-----------------------------------------------------------------------------

#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
from __future__ import absolute_import

import os
import sys

#-----------------------------------------------------------------------------
# Setup everything
#-----------------------------------------------------------------------------

# Don't forget to also update setup.py when this changes!
if sys.version_info < (3,3):
    raise ImportError(
"""
IPython 6.0+ does not support Python 2.6, 2.7, 3.0, 3.1, or 3.2.
When using Python 2.7, please install IPython 5.x LTS Long Term Support version.
Beginning with IPython 6.0, Python 3.3 and above is required.

See IPython `README.rst` file for more information:

    https://github.com/ipython/ipython/blob/master/README.rst

""")

# Make it easy to import extensions - they are always directly on pythonpath.
# Therefore, non-IPython modules can be added to extensions directory.
# This should probably be in ipapp.py.
sys.path.append(os.path.join(os.path.dirname(__file__), "extensions"))

#-----------------------------------------------------------------------------
# Setup the top level names
#-----------------------------------------------------------------------------

from .core.getipython import get_ipython
from .core import release
from .core.application import Application
from .terminal.embed import embed

from .core.interactiveshell import InteractiveShell
from .testing import test
from .utils.sysinfo import sys_info
from .utils.frame import extract_module_locals

# Release data
__author__ = '%s <%s>' % (release.author, release.author_email)
__license__  = release.license
__version__  = release.version
version_info = release.version_info

def embed_kernel(module=None, local_ns=None, **kwargs):
    """Embed and start an IPython kernel in a given scope.
    
    If you don't want the kernel to initialize the namespace
    from the scope of the surrounding function,
    and/or you want to load full IPython configuration,
    you probably want `IPython.start_kernel()` instead.
    
    Parameters
    ----------
    module : ModuleType, optional
        The module to load into IPython globals (default: caller)
    local_ns : dict, optional
        The namespace to load into IPython user namespace (default: caller)
    
    kwargs : various, optional
        Further keyword args are relayed to the IPKernelApp constructor,
        allowing configuration of the Kernel.  Will only have an effect
        on the first embed_kernel call for a given process.
    """
    
    (caller_module, caller_locals) = extract_module_locals(1)
    if module is None:
        module = caller_module
    if local_ns is None:
        local_ns = caller_locals
    
    # Only import .zmq when we really need it
    from ipykernel.embed import embed_kernel as real_embed_kernel
    real_embed_kernel(module=module, local_ns=local_ns, **kwargs)

def start_ipython(argv=None, **kwargs):
    """Launch a normal IPython instance (as opposed to embedded)
    
    `IPython.embed()` puts a shell in a particular calling scope,
    such as a function or method for debugging purposes,
    which is often not desirable.
    
    `start_ipython()` does full, regular IPython initialization,
    including loading startup files, configuration, etc.
    much of which is skipped by `embed()`.
    
    This is a public API method, and will survive implementation changes.
    
    Parameters
    ----------
    
    argv : list or None, optional
        If unspecified or None, IPython will parse command-line options from sys.argv.
        To prevent any command-line parsing, pass an empty list: `argv=[]`.
    user_ns : dict, optional
        specify this dictionary to initialize the IPython user namespace with particular values.
    kwargs : various, optional
        Any other kwargs will be passed to the Application constructor,
        such as `config`.
    """
    from IPython.terminal.ipapp import launch_new_instance
    return launch_new_instance(argv=argv, **kwargs)

def start_kernel(argv=None, **kwargs):
    """Launch a normal IPython kernel instance (as opposed to embedded)
    
    `IPython.embed_kernel()` puts a shell in a particular calling scope,
    such as a function or method for debugging purposes,
    which is often not desirable.
    
    `start_kernel()` does full, regular IPython initialization,
    including loading startup files, configuration, etc.
    much of which is skipped by `embed()`.
    
    Parameters
    ----------
    
    argv : list or None, optional
        If unspecified or None, IPython will parse command-line options from sys.argv.
        To prevent any command-line parsing, pass an empty list: `argv=[]`.
    user_ns : dict, optional
        specify this dictionary to initialize the IPython user namespace with particular values.
    kwargs : various, optional
        Any other kwargs will be passed to the Application constructor,
        such as `config`.
    """
    from IPython.kernel.zmq.kernelapp import launch_new_instance
    return launch_new_instance(argv=argv, **kwargs)