Why are there no ordered dictionaries?

[bonono at gmail.com]

Fredrik Lundh wrote:
> bonono at gmail.com wrote:
>
> > If I need the dict feature 90% of the time, and the list feature 10% of
> > the time.
>
> Wasn't your use case that you wanted to specify form fields in
> a given order (LIST), render a default view of the form in that
> order (LIST), and, later on, access the field specifiers in an
> arbitrary order, based on their key (DICT).  Sure looks like it's
> the LIST aspect that's important here...
Yes. But whether LIST aspect or DICT is important is well, opinion. So
let's leave it there.
>
> > I want an ordered dict. Rather than a list and create this new view every
> > time and every where I want to use it as a dict.
>
> You want an ordered dict because you say you want one, not be-
> cause it's the best way to address your use case.  That's fine, but
> it's not really related to the question asked in the subject line.
Again, best way is decided by ME. If I am entering a coding contest
which is organized by YOU, that is a different story. As for related to
the subject line, since when I said my preference or use case has
anything to do with the subject line ? I have said in another post that
I don't think there should be  one in the standard library, which is
directly about the subject line.

>
> > parsing or not parsing is not the point, and parsing/converting is
> > still "create a new view" of an existing data structure.
>
> Copying the entire data structure hardly qualifies as "creating a
> new view".  dict() doesn't do that; in this use case, it doesn't cost
> you anything to use it.
doesn't cost me anything ? That is good news to me.