copy_reg — Register pickle support functions
Note
The copy_reg module has been renamed to copyreg in Python 3.0.
The 2to3 tool will automatically adapt imports when converting your
sources to 3.0.
The copy_reg module provides support for the pickle and
cPickle modules. The 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.
-
copy_reg.constructor(object)
- Declares object to be a valid constructor. If object is not callable (and
hence not valid as a constructor), raises TypeError.
-
copy_reg.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 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. TypeError will be raised if
object is a class or constructor is not callable.
See the pickle module for more details on the interface expected of
function and constructor.