python 装饰器装饰add函数

[python]代码库

def logger(fn):
    def wrap(*args,**kwargs):
        """This is a wrap."""
        print("before")
        start = datetime.datetime.now()
        ret = fn(*args,**kwargs)
        duration = (datetime.datetime.now() - start).total_seconds()
        print(duration)
        return ret
    copy_properties(fn,wrap)
    return wrap


@logger
def add(x,y):
    """This is a add.
       return int
       x int
       y int
       """
    print("======call add========")
    time.sleep(2)
    return x + y