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v0.5.1
https://github.com/python/cpython
09 December 2020, 11:06:31 UTC
Revision 66419bafc67a79a3edc2998ffea69e7ccb05ff7a authored by Guido van Rossum on 22 December 1998, 18:45:16 UTC, committed by Guido van Rossum on 22 December 1998, 18:45:16 UTC 
Added Tcl 8.0.4 installer.  Added Tools/idle.
1 parent 292b9eb
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Tip revision: 66419bafc67a79a3edc2998ffea69e7ccb05ff7a authored by Guido van Rossum on 22 December 1998, 18:45:16 UTC
Added Tcl 8.0.4 installer. Added Tools/idle.
Tip revision: 66419ba
copy_reg.py 
# Helper to provide extensibility for pickle/cPickle.

dispatch_table = {}
safe_constructors = {}

def pickle(ob_type, pickle_function, constructor_ob = None):
    dispatch_table[ob_type] = pickle_function

    if constructor_ob is not None:
        constructor(constructor_ob)

def constructor(object):
    safe_constructors[object] = 1

# Example: provide pickling support for complex numbers.

def pickle_complex(c):
    return complex, (c.real, c.imag)

pickle(type(1j), pickle_complex, complex)
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