Ron Griswold wrote:
> I'm almost positive I've seen a function somewhere that will call a
> method of an object given the method's name. Something like:
>
> apply(obj, "func_name", args)
>
> is equivalent to:
>
> obj.func_name(args)
>
> For some reason I thought this was the apply function, but that doesn't
> appear to be the case. Can someone point me in the right direction?
sounds like you're looking for getattr (get attribute):
func = getattr(obj, "func_name")
result = func(args)
or, in one line:
result = getattr(obj, "func_name")(args)
a common pattern is
try:
func = getattr(obj, "func_name")
except AttributeError:
... deal with missing method ...
else:
result = func(args)
(this makes sure that an AttributeError raise inside the method isn't
confused with an AttributeError raise by getattr).
another pattern is
func = getattr(obj, "func_name", None)
if func:
func(args)
which only calls the method if it exists. here's a variation:
func = getattr(obj, "func_name", None)
if callable(func):
func(args)
hope this helps!
</F>
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