On Aug 8, 2010, at 4:14 PM, Costin Gament wrote:
Thank you for your answer, but it seems I didn't make myself clear.
You could have been clearer in your first post, yeah.
Take the code:
class foo:
a = 0
b = 0
c1 = foo()
c1.a = 5
c2 = foo()
print c2.a
5
Somehow, when I try to acces the 'a' variable in c2 it has the same
value as the 'a' variable in c1. Am I missing something?
I can't reproduce this. Which version are you using?
On Sun, Aug 8, 2010 at 4:59 PM, Roald de Vries <downa...@gmail.com>
wrote:
Your problem probably is that a and b are class variables;
And class variables are not instance variables.
c1 and c2 are
different objects (in your terminology: they point to different
instances).
I still suspect that this is the problem. In Python, classes are
objects (instances of another class) too. In your class, you assign 0
to the variables foo.a and foo.b.
See http://docs.python.org/tutorial/classes.html#class-objects for
more
info.
So:
class foo:
a = 0
creates a class variable foo.a and set it to 0
b = 0
creates a class variable foo.b and set it to 0
c1 = foo()
creates a new foo that can be referenced as c1
c1.a = 5
creates an instance variable c1.a and set it to 5
c2 = foo()
creates a new foo that can be referenced as c2
print c2.a
there is no instance variable c2.a, so the class variable foo.a is
referenced
5
I get 0 here.
Cheers, Roald
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