How to share function between static methods #python

Question

There are two static methods in my class:

class my_class():
    def main(self, input):
        pass

    @staticmethod
    def static_1():
        #repeated_code
        pass

    @staticmethod
    def static_2():
        #repeated_code
        pass

As they share some #repeated_code, I want to reduce the repetition in them by writing a function def repeat()for the #repeated_code.

Since they are inside static methods, I couldn't call a class method via self.repeat().

It doesn't seems reasonable to write the function outside the class, because the function repeat is only used inside the class.

How should I achieve the propose of avoiding repeating myself?

I doubt it's a great idea to write your class like that. Normally, static methods are placed in a class for convenience purposes. For example, google style guide for Python recommends not using them: google.github.io/styleguide/pyguide.html. Why not simply create a module with these functions? You can have your repeat() function in the same module as well and avoid duplication. — NotAName
– NotAName, Commented Aug 12, 2021 at 3:26

sj95126 · Accepted Answer · 2021-08-12 03:34:19Z

1

I'm not sure this is the right way to go - static methods are meant to be small convenience functions, and if you have to share code, they aren't small.

But, if you want to, you can call a static method by referencing the class by name, like this:

class test():
    @staticmethod
    def repeat():
        # shared code
        pass

    @staticmethod
    def static_1():
        test.repeat()

    @staticmethod
    def static_2():
        test.repeat()

answered Aug 12, 2021 at 3:34

sj95126

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3 Comments

zheyuanWang Over a year ago

Actually, I have no idea weather I should use a static method. Maybe I should follow your advice to not use them.

sj95126 Over a year ago

Well, it's a guideline, and guidelines are flexible. It may make sense to keep the code within the object, but maybe it doesn't need to be a static method. I checked the python 3.8 modules and found, for example, that importlib uses a 25-line static method with 2 inner functions, so sometimes there's use for it.

zheyuanWang Over a year ago

according to this relavant answer, I think I shouldn't make them static methods! -->They are __visualizing_debug_fucntions, which would never be used outside the class.

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