(self)
return self._dict.__len__()
x.__len__() <==> len(x)
x.__len__() <==> len(x)
x . __len__ () < == > len ( x )
def __len__(self):
        '''x.__len__() <==> len(x)'''
        return self._dict.__len__()
def __len__ ( self ) : return self . _dict . __len__ ( )