python中装饰器你真的理解吗？

Posted 2020-09-28

def w1(func):
    print(‘装饰器1....‘)
    def w1_in():
        print(‘w1_in.....‘)
        func()
    return w1_in

def w2(func):
    print(‘装饰器2.....‘)
    def w2_in():
        print(‘w2_in......‘)
        func()
    return w2_in

@w1
@w2
def f1():
    print(‘f1....‘)

f1()

你知道上面的代码执行的步骤吗？.................................................................................

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装饰器2.....
装饰器1....
w1_in.....
w2_in......
f1....

 带有参数的装饰器：

def w1(func):
    print(‘装饰器1....‘)
    def w1_in(a,b):
        print(‘w1_in.....‘)
        func(a,b)
    return w1_in

def w2(func):
    print(‘装饰器2.....‘)
    def w2_in(a,b):
        print(‘w2_in......‘)
        func(a,b)
    return w2_in

@w1
@w2
def f1(a,b):
    print(‘a=%d,b=%d‘%(a,b))

f1(22,10)