Martin P. Hellwig wrote:
> While I was reading PEP 8 I came across this part:
>
> """
> Function and method arguments
> Always use 'self' for the first argument to instance methods.
> Always use 'cls' for the first argument to class methods.
> """
>
> Now I'm rather new to programming and unfamiliar to some basic concepts
> of OOP. However I wrote most of my classes in the new style way and by
> this I have always used 'self' for the first argument of an Instance
> method, but now I'm unsure what actually the difference is between an
> instance and a class method is and when to use it in which case.
>
> Could somebody please enlighten me (a rtfm/wrong newsgroup is just as
> welcome of course), preferably in a short code example?
You're probably doing fine.
class C(object):
# instance method
def foo(self):
...
# class method
@classmethod
def bar(cls):
...
It's probably pretty unlikely that you've declared any class methods,
but if you have, you should be able to identify them by the call to
``classmethod``. If you don't see any of those, you're fine.
A class method is just a method that can be called like:
Class.method()
instead of having to be called like:
instance.method()
For 99% of the methods you write, I'd expect them to be instance methods.
STeVe
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