Python:计算元组列表的"group-id"我有一个元组列表: tups = [("A","a"), ("A","b"), ("A", "c"), ("B", "a"), ("B", "b"), ("C", "a"), ("L", "a")] ...2024-09-28 已阅读: n次
python中的MySQL连接器:ins我在数据库“testdb”中有一个表“persons”。在mysql命令行中执行以下操作时,将显示以下内容: SELECT * FROM persons; +----------+---------- ...2024-09-28 已阅读: n次