Lib/idlelib/Delegator.py

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