先安装pymysql import pymysql # 连接到数据库 connection = pymysql.connect(host='localhost',port=3306,                              user='root',                              password='123',                              db='slb',                              charset='utf8',                              ) try:     # with connection.cursor() as cursor:     #     # 插入新的数据     #     sql = "INSERT INTO `users` (`email`, `password`) VALUES (%s, %s)"     #     cursor.execute(sql, ('webmaster@python.org', 'very-secret'))     #     # # 默认情况下，连接不是自动提交。所以你必须自行保存好     # connection.commit()     with connection.cursor() as cursor:         # 读取单个记录         sql = "SELECT * FROM slb.slb_machine_maintain"         cursor.execute(sql)         result = cursor.fetchone()         print(result) finally:     connection.close()