import pymysql class DbMysql: cursor = None test = None def __init__(self): if self.cursor is None: host = 'rm-2zecd1ox47350846z885.mysql.rds.aliyuncs.com' user = 'bigdata_dy' password = 'douyindata1!' port = 3306 self.db = pymysql.connect( host=host, user=user, password=password, database='brand_data', port=port, charset='utf8mb4' ) # 使用cursor()方法获取操作游标 self.cursor = self.db.cursor() def __test__(self): if self.test is None: host = 'rm-2zej6ys9n36kdfbq7o.mysql.rds.aliyuncs.com' user = 'test_db' password = 'Kuxuan1!' port = 3306 self.db = pymysql.connect( host=host, user=user, password=password, database='brand_data', port=port, charset='utf8mb4' ) # 使用cursor()方法获取操作游标 self.test = self.db.cursor()