Access static variable from static method

Question

I want to access a static variable from a static method:

#!/usr/bin/env python
class Messenger:
    name = "world"
    @staticmethod
    def get_msg(grrrr):
        return "hello " + grrrr.name

print Messenger.get_msg(Messenger)

How to do it without passing grrrr to a method? Is this the true OOP?..

Anything like name or self.name seems not working:

NameError: global name 'name' is not defined

and

NameError: global name 'self' is not defined

Community · Accepted Answer · 2017-05-23 12:34:38Z

34

Use @classmethod instead of @staticmethod. Found it just after writing the question.

In many languages (C++, Java etc.) "static" and "class" methods are synonyms. Not in Python.

edited May 23, 2017 at 12:34

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answered Jun 27, 2012 at 19:38

Dmitry Isaev

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Comments

Ioan Alexandru Cucu · Accepted Answer · 2020-08-29 11:33:10Z

16

def get_msg():
    return "hello " + Messenger.name

You can't use self.name because self is not defined. self is a naming convention for the first parameter of non-static or non-classmethod methods. It points to the object on which you called the method. Since your method is static, you don't need an object to call it on.

edited Aug 29, 2020 at 11:33

answered Jun 27, 2012 at 19:46

Ioan Alexandru Cucu

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2 Comments

DaCruzR Over a year ago

So to access a static variable within a static method of the class, I have to prefix the class name to the static variable I am accessing, like you have shown in your answer?

Ioan Alexandru Cucu Over a year ago

@RaynerDaCruz if you access it in a @staticmethod, then yes, you need to prefix the class name. If it's a @classmethod, then you can also use the cls argument of your method. Difference is well described here: medium.com/school-of-code/…

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