Python way to make a function variable static

Question

I have to create a @staticmethod inside a class.. I would know if there is any way to "save" a variable defined inside the static method between two sequentially call.

I mean a variable that behave like static variable in C++

This is a hint that you shouldn't be using a static method. Maybe a @classmethod instead, so you can store values on the class itself? Not that you can't assign directly -- MyClass._foo = bar -- but it's not a good smell. — Charles Duffy
– Charles Duffy, Commented Jul 12, 2018 at 11:20

Jonathan DEKHTIAR · Accepted Answer · 2018-07-12 12:13:59Z

5

Absolutely, you should create a static (or class) variable as you pointed out.

class Example:
    name = "Example"  #  usually called a class-variable

    @staticmethod
    def static(newName=None):
        if newName is not None:
            Example.name = newName

        print ("%s static() called" % Example.name)



    @classmethod
    def cls_static(cls, newName=None):
        if newName is not None:
            cls.name = newName

        print ("%s static() called" % cls.name)

Example.static()
Example.static("john")

Example.cls_static()
Example.cls_static("bob")

Depending on your preferences, you can use either one or the other. I let you read this link for more information: http://radek.io/2011/07/21/static-variables-and-methods-in-python/

edited Jul 12, 2018 at 12:13

answered Jul 12, 2018 at 11:40

Jonathan DEKHTIAR

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2 Comments

Goswin von Brederlow Over a year ago

In cls_static where does newName come from?

Jonathan DEKHTIAR Over a year ago

Oh sorry @GoswinvonBrederlow, I made a mistake, I edit my post

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