On Thu, Oct 8, 2009 at 2:36 PM, Adrian Buehlmann <adr...@cadifra.com> wrote:
> On 08.10.2009 20:57, Steve Borho wrote:
> > FYI
> >
> > I realized today that we need to explicitly 'return False' from all of
> > our idle_add() callback routines.
> > If the return result evaluates as True, the callback will be called
> > endlessly.
> >
>
> Maybe I'm totally wrong here, but...
>
> A function that does not explicitly return a value
> returns None, which counts as False.
>
> Correct?
>
> So we have a problem only with functions that
> return a value.
>
Good question. I assumed Python worked like a shell and just returned the
result of the last operation.
>>> def foo():
... a=True
...
>>> foo()
>>> bool(foo())
False
Yep, you're right. We only need to be worried about functions that return a
value. Though it wouldn't be a bad idea to return False in these functions
as a way to document the way idle_add() routines are used by GTK+.
--
Steve Borho
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