Python: How to call ClassMethod from StaticMethod

Question

I'm working on an already established Python 2.7 Project, there needs to be some modification and I'm still relatively new to Python, here's what I did:

I have 2 functions in the same class, one is @staticmethod and other is a @classmethod. I need to call @classmethod from inside @staticmethod like -

class ABC(object):

    @classmethod
    def classm(self, name):
        ...
    
    
    @staticmethod
    def staticm(freq):
        ...
        ...
        classm("sample")

The above piece of code doesn't work, so I converted the staticmethod to classmethod and then it worked fine (using 'self' in correct places)

Can someone please explain if we can call classmethod from staticmethod (most probably it seems that I don't know the syntax), if not, is there a better workaround without converting?

Use the name of the class: ClassName.class_method(...) or use the class object which is passed into class methods. — Chris
– Chris, Commented May 26, 2021 at 7:28
If you need a reference to the class it is in, the @staticmethod decorator is not the right choice. You have class method then. — Klaus D.
– Klaus D., Commented May 26, 2021 at 7:44
Does this answer your question? Calling non-static method from static one in Python — Francesco Pegoraro
– Francesco Pegoraro, Commented May 26, 2021 at 7:44

Vedant Matanhelia · Accepted Answer · 2021-05-26 07:35:47Z

2

Firstly, I would like to say that please try to not use self in class methods as the community uses self for passing the instance and so it may confuse the reader use cls instead:

class ABC:
    @classmethod
    def classm(cls, name):
     ...

You can use ABC.classm("Sample"). Example:

class ABC():
    @classmethod
    def classm(cls, name):
        print(name)

    @staticmethod
    def staticm(freq):
        ABC.classm(freq)


test = ABC()
test.staticm("Vedant")

if you run this code you will see that Vedant is getting printed and that the static method is calling the class method to do so.

answered May 26, 2021 at 7:35

Vedant Matanhelia

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Comments

Pradeep Maurya · Accepted Answer · 2022-07-04 12:59:02Z

0

class method take first argument class, while static has no problem.

class Test:
    @classmethod
    def first(cls, a):
        return a+"From first"

    @staticmethod
    def sec(a):
        print(Test.first(a), "+from 2")


a=Test
print(a.first("hello"))
a.sec("hello")

answered Jul 4, 2022 at 12:59

Pradeep Maurya

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