Staging
v0.8.1
v0.8.1
https://github.com/python/cpython
Tip revision: 6c003210943fc91e5911bcbabe1fe4b0030cf38b authored by Benjamin Peterson on 15 October 2014, 22:07:54 UTC
goodbye, 2.6
goodbye, 2.6
Tip revision: 6c00321
copy_reg.rst
:mod:`copy_reg` --- Register :mod:`pickle` support functions
============================================================
.. module:: copy_reg
:synopsis: Register pickle support functions.
.. note::
The :mod:`copy_reg` module has been renamed to :mod:`copyreg` in Python 3.0.
The :term:`2to3` tool will automatically adapt imports when converting your
sources to 3.0.
.. index::
module: pickle
module: cPickle
module: copy
The :mod:`copy_reg` module provides support for the :mod:`pickle` and
:mod:`cPickle` modules. The :mod:`copy` module is likely to use this in the
future as well. It provides configuration information about object constructors
which are not classes. Such constructors may be factory functions or class
instances.
.. function:: constructor(object)
Declares *object* to be a valid constructor. If *object* is not callable (and
hence not valid as a constructor), raises :exc:`TypeError`.
.. function:: pickle(type, function[, constructor])
Declares that *function* should be used as a "reduction" function for objects of
type *type*; *type* must not be a "classic" class object. (Classic classes are
handled differently; see the documentation for the :mod:`pickle` module for
details.) *function* should return either a string or a tuple containing two or
three elements.
The optional *constructor* parameter, if provided, is a callable object which
can be used to reconstruct the object when called with the tuple of arguments
returned by *function* at pickling time. :exc:`TypeError` will be raised if
*object* is a class or *constructor* is not callable.
See the :mod:`pickle` module for more details on the interface expected of
*function* and *constructor*.