Collections of non-arbitrary objects ?

[Michele Simionato]

On Jun 25, 8:21 pm, Marius Gedminas <mged... at gmail.com> wrote:
> On Jun 24, 2:12 pm, Bjoern Schliessmann <usenet-
>
> mail-0306.20.chr0n... at spamgourmet.com> wrote:
> > 7stud wrote:
> > > if hasattr(elmt, some_func):
> > >    elmt.some_func()
>
> > Personally, I prefer
>
> > try:
> >     elmt.some_func()
> > except AttributeError:
> >     # do stuff
>
> That also hides attribute errors that occur within some_func.  I think
> I'd rather know when elmt has an implementation of some_func that is
> buggy.  Thus I prefer the hasattr version.

Or possibly

try:
   do_func = elmt.some_func
except AttributeError:
   do_stuff()
else:
   do_func()

(internally hasattr is doing that anyway).

         Michele Simionato