On Sun, Aug 8, 2010 at 10:01 AM, Tim Harig <user...@ilthio.net> wrote: > On 2010-08-08, Costin Gament <costin.gam...@gmail.com> wrote: >> Thank you for your answer, but it seems I didn't make myself clear. >> 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? > > Others have told you that at a and b belong to the class object rather then > to the instance objects. Perhaps this will demonstrate the difference: > >>>> class foo(): > ... def __init__(self): > ... self.a = 0 > ... self.b = 0 > ... >>>> c1 = foo() >>>> c1.a = 5 >>>> c2 = foo() >>>> print c2.a > 0 >>>> > -- > http://mail.python.org/mailman/listinfo/python-list >
Is it possible that you are using a mutable class object? A common gotcha is to do something like this: >>> class foo(object): ... x = [] ... >>> a = foo() >>> b = foo() >>> a.x.append(123) >>> b.x [123] And expect b.x to be an empty list. -- http://mail.python.org/mailman/listinfo/python-list
