Connection between class instance and static method in IronPython

Question

I have a question about calling static methods in IronPython via class instance. Let's say I have next static method:

class SomeClass(object):
    def SomeMethod(number):
        return number + 10

SomeMethod = staticmethod(SomeMethod)

I can call this method via class instance without any problems:

instance = SomeClass()
instance.SomeMethod(1)

But what about case when I want to return some values from self object via static method. Consider next case: I initialized field of this class object with some value in constructor and want to return this value from static method. Then I should somehow provide dependency between my object and my static method. My class looks like this:

class SomeClass(object):
    def SomeMethod(self, number):
        return self._numberValue + number + 10

SomeMethod = staticmethod(SomeMethod)

    def __init__(self):
        self._numberValue = 10

I try to call my static method exactly the same way:

instance = SomeClass()
instance.SomeMethod(1)

But then I got error : 'SomeMethod() takes exactly 2 argumets (1 given)'. Is there possibility to provide connection between class object and static method? Or this just makes no sense?)

Mike Scotty · Accepted Answer · 2017-07-19 13:22:21Z

1

A "normal" (non-static) class method receives a reference to the instance (self) implicitely as first parameter.

If you define your method as static, you have to pass an instance explicitely:

instance = SomeClass()
instance.SomeMethod(instance, 1)

Note that self is not a magic keyword, it's just a convention. You could use any other name for that variable if that makes it clearer:

def SomeMethod(inst, number):
    return inst._numberValue + number + 10
SomeMethod = staticmethod(SomeMethod)

answered Jul 19, 2017 at 13:22

Mike Scotty

10.8k5 gold badges41 silver badges52 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Connection between class instance and static method in IronPython

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related