Kristofer Tengström wrote:
> Hi, I'm having trouble creating objects that in turn can have custom
> objects as variables. The code looks like this:
>
> ---------------------------------------------
>
> class A:
> sub = dict()
Putting it into the class like this means sub is shared by all instances.
> def sub_add(self, cls):
> obj = cls()
> self.sub[obj.id] = obj
>
> class B(A):
> id = 'inst'
>
> base = A()
> base.sub_add(B)
> base.sub['inst'].sub_add(B)
>
> print # prints a blank line
> print base.sub['inst']
> print base.sub['inst'].sub['inst']
>
> ----------------------------------------------
>
> Now, what I get from this is the following:
> <__main__.B instance at 0x01FC20A8>
> <__main__.B instance at 0x01FC20A8>
> Why is this? What I want is for them to be two separate objects, but
> it seems like they are the same one. I've tried very hard to get this
> to work, but as I've been unsuccessful I would really appreciate some
> comments on this. I'm sure it's something really easy that I just
> haven't thought of.
Your class A needs an initialiser:
class A:
def __init__(self):
self.sub = {} # one dict per instance
# ...
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