python装饰器

# coding=utf-8


def print_hi(func):
    def inner():
        print('hi')
        func()

    return inner


@print_hi
def print_1():
    print(1)


@print_hi
def print_2():
    print(2)


print_1()
print_2()

# 运行结果:
# hi
# 1
# hi
# 2

带参数 :

# coding=utf-8


def print_hi(func):
    def inner(*args):
        print('hi')
        func(*args)

    return inner


@print_hi
def print_1(ar):
    print(1, ar)


@print_hi
def print_2():
    print(2)


print_1(55)
print_2()

# 运行结果:
# hi
# 1 55
# hi
# 2