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# encoding: utf-8 
"""Simple function to call to get the current InteractiveShell instance 
""" 
 
#----------------------------------------------------------------------------- 
#  Copyright (C) 2013  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. 
#----------------------------------------------------------------------------- 
 
#----------------------------------------------------------------------------- 
# Classes and functions 
#----------------------------------------------------------------------------- 
 
 
def get_ipython(): 
    """Get the global InteractiveShell instance. 
     
    Returns None if no InteractiveShell instance is registered. 
    """ 
    from IPython.core.interactiveshell import InteractiveShell 
    if InteractiveShell.initialized(): 
        return InteractiveShell.instance()