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+
+:mod:`copyreg` --- Register :mod:`pickle` support functions
+============================================================
+
+.. module:: copyreg
+   :synopsis: Register pickle support functions.
+
+
+.. index::
+   module: pickle
+   module: cPickle
+   module: copy
+
+The :mod:`copyreg` 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*.  *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*.
+