def one(f):
    def wrapper():
        print('i am 1')
        f()
    return wrapper

def three(f):
    def wrapper():
        print('i am 3')
        f()

    return wrapper

def two(f):
    def wrapper():
        # print('i am 2')
        return 222
    return wrapper

@one
@two
@three
def printout():
    print("finally")

print(printout())

I cannot understand the result, I think the flow would be printing I am 1 then return 222, print I am 3 then run original printout()

thus I think this should print
i am 1 n
222

However, it prints
i am 1 n
None