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将函数作为参数传给另一个函数

def hi():
    return "hi yasoob!"

def doSomethingBeforeHi(func):
    print("I am doing some boring work before executing hi()")
    print(func())

doSomethingBeforeHi(hi)
#outputs:I am doing some boring work before executing hi()
#        hi yasoob!

现在你已经具备所有必需知识,来进一步学习装饰器真正是什么了。装饰器让你在一个函数的前后去执行代码。