Nested scopes hitch

[Graham Ashton]

On Fri, 2002-04-05 at 20:49, Jeff Shannon wrote:

> In class A, the attribute a is a class attribute, not a name in an 
> enclosing scope, so the nested scope rules don't apply.  You can 
> access it by referring to self.a, however -- that will find both 
> instance and class attributes.

I remember being slightly surprised by the fact that self finds class
variables. Is there any particular reason why, considering that the you
can reference them as ClassName.var anyway?

I suspect that my surpise stemmed form an assumption that readibility
would be improved if you can tell just by looking at it whether a
variable is a class or instance variable.

I'm just curious...

Python 2.2 (#2, Mar 11 2002, 13:24:00) 
[GCC 2.95.3 20010315 (release)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> class Spam:
...   a = 1
...   def test(self):
...     if Spam.a == self.a:
...       print "equal"
...     if Spam.a is self.a:
...       print "identical"
... 
>>> s = Spam()
>>> s.test()
equal
identical


-- 
Graham Ashton