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https://github.com/python/cpython
09 December 2020, 11:06:31 UTC
Revision 243ac4f4974af46934c3ad67eb4a173553628b76 authored by Guido van Rossum on 13 October 1998, 13:37:30 UTC, committed by Guido van Rossum on 13 October 1998, 13:37:30 UTC 
Updated listbox methods to Tk 8.0.  (Moved some around, added
 
x/yview_scroll/moveto.)
1 parent 439c467
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Tip revision: 243ac4f4974af46934c3ad67eb4a173553628b76 authored by Guido van Rossum on 13 October 1998, 13:37:30 UTC
Updated listbox methods to Tk 8.0. (Moved some around, added
Tip revision: 243ac4f
Delegator.py 
class Delegator:

    # The cache is only used to be able to change delegates!

    def __init__(self, delegate=None):
        self.delegate = delegate
        self.__cache = {}

    def __getattr__(self, name):
        attr = getattr(self.delegate, name) # May raise AttributeError
        setattr(self, name, attr)
        self.__cache[name] = attr
        return attr

    def resetcache(self):
        for key in self.__cache.keys():
            try:
                delattr(self, key)
            except AttributeError:
                pass
        self.__cache.clear()

    def cachereport(self):
        keys = self.__cache.keys()
        keys.sort()
        print keys

    def setdelegate(self, delegate):
        self.resetcache()
        self.delegate = delegate

    def getdelegate(self):
        return self.delegate
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