keyword parameter order

[Anthon]

Martin,

Thanks for pointing this out. I might have found that code eventualy
but it would
have taken me quite sometime.

There was a request from a user to make ordereddict more of drop-in
replacement for dict. That can be already be done by specifying the
relax keyword parameter (or defining a subclass that does so), but it
made me revisit the idea of investigating the keyword parameter
order..
I will just drop this idea

Thanks
Anthon

On Nov 18, 12:08 pm, "Martin v. Löwis" <mar... at v.loewis.de> wrote:
> > I am not sure if this kind of info is available internally to the
> > interpreter (ordereddict is in C, so I would even prefer that). Has
> > anyone done this or anything like it?
>
> It's not available. See ceval.c:do_call; this fills the dictionary.
> From then on, information about the order of keyword arguments is
> lost.
>
> > I could probably compile the python interpreter to use ordereddict
> > instead of dict and then the parser would insert the keyword
> > parameters in specification order in the **kw ordereddict, after which
> > iteration over parameters would be ordered.
>
> If you'ld do that literally, you'll find that the keyword arguments are
> in reverse order.
>
> > As an aside: I think that allowing dict to be initialised from keyword
> > parameters (introduced in Python 2.2 IIRC) was a mistake. This kind of
> > use of keyword parameters prevents any real keyword parameters. E.g.
> > with 'maxsize' that restricts the dictionary size or 'unique' that
> > would throw an Exception if an existing key gets reassigned.
>
> For your own dictionary implementation, you are not required to follow
> this interface - in particular if you believe it was a mistake.
>
> Regards,
> Martin