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# encoding: utf-8
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"""Utilities to enable code objects to be pickled.
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Any process that import this module will be able to pickle code objects. This
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includes the func_code attribute of any function. Once unpickled, new
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functions can be built using new.function(code, globals()). Eventually
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we need to automate all of this so that functions themselves can be pickled.
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Reference: A. Tremols, P Cogolo, "Python Cookbook," p 302-305
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"""
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__docformat__ = "restructuredtext en"
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#-------------------------------------------------------------------------------
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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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#-------------------------------------------------------------------------------
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# Imports
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#-------------------------------------------------------------------------------
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import sys
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import types
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try:
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import copyreg # Py 3
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except ImportError:
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import copy_reg as copyreg # Py 2
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def code_ctor(*args):
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return types.CodeType(*args)
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def reduce_code(co):
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if co.co_freevars or co.co_cellvars:
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raise ValueError("Sorry, cannot pickle code objects with closures")
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args = [co.co_argcount, co.co_nlocals, co.co_stacksize,
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co.co_flags, co.co_code, co.co_consts, co.co_names,
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co.co_varnames, co.co_filename, co.co_name, co.co_firstlineno,
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co.co_lnotab]
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if sys.version_info[0] >= 3:
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args.insert(1, co.co_kwonlyargcount)
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return code_ctor, tuple(args)
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copyreg.pickle(types.CodeType, reduce_code)
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