(self, n)
Pop the top N states.

        :param int n:   Number of states to take.
        :return:        A list of states.
Pop the top N states.
Pop the top N states .
def pop_n(self, n):
        """
        Pop the top N states.

        :param int n:   Number of states to take.
        :return:        A list of states.
        """
        raise NotImplementedError()
def pop_n ( self , n ) : raise NotImplementedError ( )