面试题：Python装饰器嵌套使用基础

Question

请编写一个Python程序，包含两个装饰器`decorator1`和`decorator2`，并展示它们嵌套使用的效果。要求`decorator1`在函数执行前打印'Before function by decorator1'，`decorator2`在函数执行后打印'After function by decorator2'。

Answer 1

def decorator1(func):
    def wrapper():
        print('Before function by decorator1')
        func()
    return wrapper


def decorator2(func):
    def wrapper():
        func()
        print('After function by decorator2')
    return wrapper


@decorator1
@decorator2
def my_function():
    print('Inside my_function')


my_function()