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- class Delegator:
- # The cache is only used to be able to change delegates!
- def __init__(self, delegate=None):
- self.delegate = delegate
- self.__cache = set()
- def __getattr__(self, name):
- attr = getattr(self.delegate, name) # May raise AttributeError
- setattr(self, name, attr)
- self.__cache.add(name)
- return attr
- def resetcache(self):
- for key in self.__cache:
- try:
- delattr(self, key)
- except AttributeError:
- pass
- self.__cache.clear()
- def setdelegate(self, delegate):
- self.resetcache()
- self.delegate = delegate
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