Edit File: hookable.py
############################################################################## # # Copyright (c) 2009 Zope Foundation and Contributors. # All Rights Reserved. # # This software is subject to the provisions of the Zope Public License, # Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution. # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS # FOR A PARTICULAR PURPOSE. # ############################################################################## """ This module supplies a pure-Python version of zope.hookable.hookable. """ class hookable(object): __slots__ = ('__original', '__implementation') original = property(lambda self: self.__original,) implementation = property(lambda self: self.__implementation,) def __init__(self, implementation): self.__original = self.__implementation = implementation def sethook(self, newimplementation): old, self.__implementation = self.__implementation, newimplementation return old def reset(self): self.__implementation = self.__original def __call__(self, *args, **kw): return self.__implementation(*args, **kw)
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