python装饰器在类中的实现

class Test():
    xx = False

    def __init__(self):
        pass

    def test(func):
        def wrapper(self, *args, **kwargs):
            print(self.xx)
            return func(self, *args, **kwargs)
            
        return wrapper

    @test
    def test_a(self,a,b):
        print(f'ok,{a} {b}')

if __name__=='__main__':
    t=Test()
    t.test_a('a','ab')

 新写的例子,封装了一个调用API,需要保存用户调用的一些信息

def log(func):
    @functools.wraps(func)
    def wrapper(self, *args, **kwargs):
        start = time.time()
        result, success, err = None, None, None
        try:
            result = func(self, *args, **kwargs)
            success = True
        except Exception as e:
            err = e
        end = time.time()
        log_dict = {'tableName': args[0],
                    'operation': func.__name__,
                    'startTime': time.strftime(time_format, time.localtime(start)),
                    'endTime': time.strftime(time_format, time.localtime(end)),
                    'elapsedTime': int(end - start),
                    'success': success,
                    'errMsg': err,
                    'account': self.account}
        print(json.dumps(log_dict))
        return result