how to call back a method in python3?

From	"水静流深" <1248283536@qq.com>
Subject	how to call back a method in python3?
Date	2014-08-04 09:56 +0800
Newsgroups	comp.lang.python
Message-ID	<mailman.12616.1407121329.18130.python-list@python.org> (permalink)

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I want to call back a function which is the method of a class .

    def callback(self.do,x):
        return(self.do(x))

That is what i want to write,when i input 
     
    def callback(self.do,x):

error message:


      File "<stdin>", line 1
        def callback(self.do,x):
                     ^
    SyntaxError: invalid syntax


`do` is a method in my class ,how to write the code?‍

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how to call back  a method in python3? "水静流深" <1248283536@qq.com> - 2014-08-04 09:56 +0800
  Re: how to call back  a method in python3? Marko Rauhamaa <marko@pacujo.net> - 2014-08-04 08:47 +0300
    Re: how to call back  a method in python3? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-08-04 18:18 +1200

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