python 装饰器

装饰器是一种函数，它可以修改其他函数的功能。

def decorate(func):
    def decorate_real(*args, **kwargs):
        print('decorate begin')
        func(*args, **kwargs)
        print('decorate end')
    return decorate_real

@decorate
def test(name, age):
    print('hello', name, age)

test('123', 456)


class Decor(object):
    def __call__(self, func):
        def decorate_real(*args, **kwargs):
            print('decorate2 begin')
            func(*args, **kwargs)
            print('decorate2 end')
        return decorate_real

@Decor()
def test2(name, age):
    print('hello2', name, age)

test2('123', 456)