通用装饰器

通用装饰器

def wrapper(fun):
    def inner(*args,**kwargs):
        print(f"before execute target {fun} ")
        ret=fun(*args,**kwargs)
        print(f"after execute target {fun}")
        return ret
    return inner



@wrapper
def fun(*args,**kwargs):
    print(args)
    print(kwargs)
    print("test")
    return 1



if __name__=="__main__":
   ret=fun(a=2,b=4)
   print(ret)

 带有参数的装饰器：

def wrapper_outer(name):
    def wrapper(fun):
        """
    
        :param fun: 被装饰的函数
        :return: inner
        """
        def inner(*args,**kwargs):
            print(f"warpper_outer agrs is {name} ")
            ret=fun(*args,**kwargs)
            print(f"after execute target {fun}")
            return ret
        return inner
    return wrapper
@wrapper_outer("user")  #先执行函数的调用，函数返回一个装饰器，和@组合成语法糖，@wrapper
def fun(*args,**kwargs):
    print(args)
    print(kwargs)
    return 1


if __name__=="__main__":
    fun(a=2,b=4)