Bug in __init__?

[Neil Cerutti]

On Jan 18, 2008 12:33 PM, Zbigniew Braniecki
<zbigniew.braniecki at gmail.com> wrote:
> > class A:
> >    def __init__ (self, val=[]):
> >      print val
> >      self.lst = val
> >
> > val is created only *once* and shared across all instaces of A.
>
> Thanks for help guys!
>
> It's really a nice pitfall, I can hardly imagine anyone expecting this,
> or how easily could I find this info (e.g. what query should I give to
> google to get it without bothering people on this group)

In this unfortunate case, useful searches were "default arguments",
which would be hard to guess without already knowing what's going
wrong, or "python gotchas pitfalls", which is a good general purpose
search for when you can't understand what's happening in simple code.

-- 
Neil Cerutti <mr.cerutti+python at gmail.com>