On Jul 12, 10:23 am, Jeremy Lynch <[EMAIL PROTECTED]> wrote:
> Hello,
>
> Learning python from a c++ background. Very confused about this:
>
> ============
> class jeremy:
> list=[]
> def additem(self):
> self.list.append("hi")
> return
>
> temp = jeremy()
> temp.additem()
> temp.additem()
> print temp.list
>
> temp2 = jeremy()
> print temp2.list
> ==============
> The output gives:
> ['hi','hi']
> ['hi','hi']
>
> Why does adding items to one instance produce items in a separate
> instance? Doesn't each instance of jeremy have its' own "list"?
>
> Many thanks for clearing up this newbie confusion.
>
> Jeremy.
The reason it works like that is that your variable "list" isn't an
instance variable per se. Instead, you should have it like this:
<code>
class jeremy:
def __init__(self):
self.lst=[]
def additem(self):
self.lst.append("hi")
return
</code>
Now it works as expected. It's some kind of scope issue, but I can't
explain it adequately.
Mike
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