class MyClass:
def some_func(x):
return x+2
When I call MyClass.some_func(10) -- it fails, with error message:
TypeError: unbound method some_func() must be called with MyClass
instance as first argument (got int instance instead)
OK. I figured out that something like this works:
obj = MyClass()
y = obj.some_func(10)
BUT, this means that we have functions applying for instances. That is
we have "instance method". Now, how do I implement some function which
I can invoke with the class name itself ? Instead of creating a dummy
object & then calling.... In short, how exactly do I create "class
methods" ??
You mean the classmethod decorator? :)
class MyClass:
@classmethod
def some_func(cls, x):
return x+2
MyClass.some_func(42)
(the decorator syntax was added in 2.4, so if you need it in
pre-2.4, you'd have to do
class MyClass:
def some_func(cls, x):
return x+2
some_func = classmethod(some_func)
to get the same behavior)
-tkc
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