Staging
v0.5.1
v0.5.1
https://github.com/python/cpython
Tip revision: f5f9d99974febbff6d4d55ef36bbfa0c71ed0738 authored by Barry Warsaw on 12 September 2008, 23:35:48 UTC
Fix the release level
Fix the release level
Tip revision: f5f9d99
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*.