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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 count_moves_in_game_range(self, game_begin, game_end):
 """Count the total moves in a game range. Args: game_begin: integer, starting game game_end: integer, ending game Uses the `ct_` keyspace for rapid move summary. """

        rows = self.bt_table.read_rows(
            ROWCOUNT_PREFIX.format(game_begin),
            ROWCOUNT_PREFIX.format(game_end),
            filter_=bigtable_row_filters.ColumnRangeFilter(
                METADATA, MOVE_COUNT, MOVE_COUNT))
        return sum([int(r.cell_value(METADATA, MOVE_COUNT)) for r in rows])