Python vs C for a mail server
paul at boddie.org.uk
Sun Jan 29 19:10:59 EST 2006
Fredrik Lundh wrote:
> Paul Boddie wrote:
[Quoting Jay Parlar...]
> > > I don't think I've ever seen anyone advocating calling a function like
> > > getattr(obj "foo" + "bar")().
> > >From Lib/compiler/visitor.py:
> > meth = getattr(self.visitor, 'visit' + className, 0)
> > Later on:
> > meth(node, *args)
> if you read Jay's assertion in context, your "refutation" strikes me as
> somewhat silly.
The context was whether you can know before running the program whether
the function you're attempting to call exists, along with where it is
defined. Obviously, it's a struggle to think of cases where one would
do this for the sake of it (especially with hard-coded string
literals), but where one wants to take some value (eg. a class name)
and dispatch to some callable (eg. some visitor handler method) based
on that dynamic information, it's a useful technique. Whether
widespread usage of such a technique counts as advocacy is a matter I
don't find particularly interesting to discuss.
Or should I be looking for some other context here?
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