11.2. copyreg
— Register pickle
support functions¶
The copyreg
module provides support for the pickle
module. 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.
-
copyreg.
constructor
(object)¶ Declares object to be a valid constructor. If object is not callable (and hence not valid as a constructor), raises
TypeError
.
-
copyreg.
pickle
(type, function, constructor=None)¶ 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.
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.