[Python-ideas] Default arguments in Python - the return - running out of ideas but...

[Steven D'Aprano]

On Fri, 15 May 2009 09:28:02 am CTO wrote:
> On May 14, 6:27 pm, Steven D'Aprano <st... at pearwood.info> wrote:
> > On Thu, 14 May 2009 09:03:34 am CTO wrote:
> > > Thanks for the input, but I've already written the code to do
> > > this. It
> > > is available at
> > > <URL:http://code.activestate.com/recipes/576751/>.
> >
> > [...]
> >
> > > The gode given is slow and ugly, but it does appear-
> > > at least to me- to do what is being asked here.
> >
> > Your code seems to work only if the source to the function is
> > available. That will mean it can't be used by people who want to
> > distribute .pyc files only.
> >
> > --
> > Steven D'Aprano
>
> I think the list is eating my replies, but suffice to say that
> there's a new version of the recipe at <URL:
> http://code.activestate.com/recipes/576754/> that doesn't have that
> limitation and looks pretty close to the syntax proposed above.


And instead has another limitation, namely that it only works if you 
pass the non-default argument by keyword.

f(123, y=456)  # works
f(123, 456)  # fails if y has been given a default value.



-- 
Steven D'Aprano