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UserDict � �� .

�� . �� , �� , �� , �� : UserString, UserList �- UserDict. �� , �� UserDict �� , �� .

class UserDict:
    def __init__(self, dict=None):
        self.data = {}
        if dict is not None: self.update(dict)

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�� UserDict:

def clear(self): self.data.clear()
def copy(self):
if self.__class__ is UserDict:
return UserDict(self.data)
import copy
return copy.copy(self)
def keys(self): return self.data.keys()
def items(self): return self.data.items()
def values(self): return self.data.values()

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