functools.wraps

import functools


def note(func):
    " not function "
    # @functools.wraps(func)  # 对自定义的装饰器再加上functools.wraps装饰器，　作用是让自定义的装饰器函数wrapped在传给func时，　仍保ｆｕｎｃ函数的解释文档__doc__
    def wrapped(*args, **kwargs):
        " wrapped function"
        print('note something')
        return func(*args, **kwargs)
    return wrapped

@note
def test(a, b):
    " func function"
    print('I am test')
    return a+b

print(test(1,2))
print(test.__doc__)

运行结果：

note something
I am test
3
 wrapped function

import functools


def note(func):
    " not function "
    @functools.wraps(func)
    def wrapped(*args, **kwargs):
        " wrapped function"
        print('note something')
        return func(*args, **kwargs)
    return wrapped

@note
def test(a, b):
    " func function"
    print('I am test')
    return a+b

print(test(1,2))
print(test.__doc__)

运行结果：

note something
I am test
3
 func function