(self, state)
Applies an operator to itself.
Applies an operator to itself.
Applies an operator to itself .
def apply_operator(self, state):
        """
        Applies an operator to itself.
        """
        raise NotImplementedError('implement apply_operator in a subclass')
def apply_operator ( self , state ) : raise NotImplementedError ( 'implement apply_operator in a subclass' )