装饰器

#有返回值的装饰器
def outer(func):
    def inner():
        print(‘befor‘)
        r = func()
        print(‘after‘)
        return r
    return inner


@outer
def f1():
    print(‘F1‘)
    return "ff"

r = f1()
print(r)

def outer(func):
    def inner(a):
        print(‘befor‘)
        r = func(a)
        print(‘after‘)
        return r
    return inner


@outer
def f1(args):
    print(args)
    return "ff"

r = f1(‘zhang‘)
print(r)

def outer(func):
    def inner(*args, **kwargs):
        print(‘befor‘)
        r = func(*args, **kwargs)
        print(‘after‘)
        return r
    return inner