関連ワード:  python if __name__ == __main__    python if __name__ == __main__ meaning    python if __name__ == __main__ example    python if name == main args    python if __ name __ == '__ main __' explained    python if name main command line arguments    python if __ name __ == '__ main __' return    python if name main global variables    python if name main syntax    python if name main async