<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def is_list_member(self, list_id, user_id):
 """ Check if a user is member of a list :param list_id: list ID number :param user_id: user ID number :return: :code:`True` if user is member of list, :code:`False` otherwise """

        try:
            return bool(self._client.show_list_member(list_id=list_id, user_id=user_id))
        except TweepError as e:
            if e.api_code == TWITTER_USER_IS_NOT_LIST_MEMBER_SUBSCRIBER:
                return False
            raise