来个简单的装饰器

 

def cached_method_result(fun):    """方法的结果缓存装饰器"""    @wraps(fun)    def inner(self, *args, **kwargs):        if not hasattr(fun, 'result'):            result = fun(self, *args, **kwargs)            fun.result = result            fun_name = fun.__name__            setattr(self.__class__, fun_name, result)            setattr(self, fun_name, result)            return result        else:            return fun.result    return inner

 

使用方式：

class MongoMixin(object):    @property    @utils_ydf.decorators.cached_method_result    def mongo_16_client(self):        mongo_var = pymongo.MongoClient(app_config.connect_url)        return mongo_var

 

无论怎么调用mongo_16_client这个属性，都不会多次连接。