Tools/idle/Delegator.py

   1
   2 class Delegator:
   3
   4     # The cache is only used to be able to change delegates!
   5
   6     def __init__(self, delegate=None):
   7         self.delegate = delegate
   8         self.__cache = {}
   9
  10     def __getattr__(self, name):
  11         attr = getattr(self.delegate, name) # May raise AttributeError
  12         setattr(self, name, attr)
  13         self.__cache[name] = attr
  14         return attr
  15
  16     def resetcache(self):
  17         for key in self.__cache.keys():
  18             try:
  19                 delattr(self, key)
  20             except AttributeError:
  21                 pass
  22         self.__cache.clear()
  23
  24     def cachereport(self):
  25         keys = self.__cache.keys()
  26         keys.sort()
  27         print keys
  28
  29     def setdelegate(self, delegate):
  30         self.resetcache()
  31         self.delegate = delegate
  32
  33     def getdelegate(self):
  34         return self.delegate