摘要：
单例模式的实现方式 将类实例绑定到类变量上 class Singleton(object): _instance = None def __new__(cls, args): if not isinstance(cls._instance, cls): cls._instance = super(S 阅读全文
摘要：
``` def save_app_info(self): try: # update app_info print(self.dicts) data = db_session.query(App_Info).filter_by(app_id=self.app_id,mall_name=self.mall... 阅读全文