[Python-Dev] PEP 455: TransformDict

[Antoine Pitrou]

On Sun, 15 Sep 2013 16:14:24 +0300
Serhiy Storchaka <storchaka at gmail.com> wrote:
> 15.09.13 14:23, Antoine Pitrou написав(ла):
> > On Sun, 15 Sep 2013 13:56:26 +0900
> > Larry Hastings <larry at hastings.org> wrote:
> >> On 09/14/2013 07:30 PM, Antoine Pitrou wrote:
> >>> On Sat, 14 Sep 2013 14:33:56 +0900
> >>> Larry Hastings <larry at hastings.org> wrote:
> >>>> Whenever I read a discussion about the dict, I always wonder whether the
> >>>> same thing applies to a set.  Have you considered the utility of a
> >>>> TransformSet?  Or is it YAGNI?
> >>> Well, a TransformSet is like a normal dict, you just need to call the
> >>> transformation function yourself when inserting the keys.
> >>
> >> s/normal dict/normal set/
> >
> > No, read my example.
> 
> A TransformDict is like a normal dict, you just need to call the 
> transformation function yourself when inserting the keys and insert a 
> pair of (orig_key, value), or is like two normal dicts, you just need to 
> call the transformation function yourself when inserting the keys and 
> update parallel mapping from transformed keys to original keys.

I don't really care. What's the point in the end? TransformDict is
non-trivial to implement, while the so-called "TransformSet" is just a
dict with a different API.