20220323-day12:装饰器详解

import functools
print("第一回合".center(30,"*"))

def func():
    print("我是func函数")
    value = (11,22,33,44)
    return value

def outer(origin):
    def inner():
        print("before")
        res = origin()
        print("after")
        return res
    return inner

func = outer(func)

result = func()
print(result)

print("第二回合".center(30,"*"))

#
# python内部会自动执行函数名（XXX），执行完毕之后，再讲结果赋值给xxx
# xxx = 函数名(xxx)

def outer(origin):
    def inner():
        print("before")
        res = origin()
        print("after")
        return res
    return inner

@outer # func = outer(func)
def func():
    print("我是func函数")
    value = (11,22,33,44)
    return value
result = func()
print(result)

print("第三回合".center(30,"*"))
def outer(origin):
    @functools.wraps(origin)
    def inner(*args,**kwargs):
        print("before")
        res = origin(*args,**kwargs)
        print("after")
        return res
    return inner

@outer # func = outer(func)
def func1(a1):
    print("我是func1函数")
    value = (11,22,33,44)
    return value

@outer # func = outer(func)
def func2(a1,a2):
    print("我是func2函数")
    value = (11,22,33,44)
    return value

@outer # func = outer(func)
def func3(a1):
    print("我是func3函数")
    value = (11,22,33,44)
    return value

func1(1)
func2(11,22)
func1(999)