python decorator @mydecorator

 

The follow code demonstrate decorator in python. When executed, the closest function / decorator will be executed first and the the one above it. 

As a result, you will get <c><b><a>hello world</a></b></c>

def dec1(a: callable):

    def inner():

      x = a()

      return "<a>" + x + "</a>"

    return inner

def dec2(a: callable):

   

    def inner():

      x = a()

      return "<b>" + a() + "</b>"

    return inner

def dec3(a: callable):

   

    def inner():

      x = a()

      return "<c>" + a() + "</c>"

    return inner

@dec3

@dec2

@dec1

def hello():

    return "hello world"