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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def list_tables(self, limit=None, start_table=None):
 """ Return a list of table names associated with the current account and endpoint. :type limit: int :param limit: The maximum number of tables to return. :type start_table: str :param limit: The name of the table that starts the list. If you ran a previous list_tables and not all results were returned, the response dict would include a LastEvaluatedTableName attribute. Use that value here to continue the listing. """

        data = {}
        if limit:
            data['Limit'] = limit
        if start_table:
            data['ExclusiveStartTableName'] = start_table
        json_input = json.dumps(data)
        return self.make_request('ListTables', json_input)