[IPython-dev] Incompatible change discussion: Pretty printing of ordered dict.

[Dirk Boonzajer Flaes]

I am pretty experienced with numpy but I wasn't with using dicts, and this
'feature" confused me a lot! I would  be all for removing the sorting to
make it clear that the order is not preserved, although it does make
displaying dicts a bit less clear.

On Aug 2, 2017 10:33 PM, "Thomas Kluyver" <takowl at gmail.com> wrote:

> I don't have a particular concrete use case, but as an experienced Python
> programmer who knows that dicts are conceptually unordered, I like the
> sorted presentation and would be sorry to lose it. It makes it easier to
> quickly find something in a dict if its shown in alphabetical order.
>
> If the dict maintaining insertion order becomes a language feature rather
> than an implementation detail, I would favour showing that. But for now
> it's an implementation detail, so it shouldn't change how we think about
> dicts.
>
> Thomas
>
> On 2 August 2017 at 19:44, Matthias Bussonnier <
> bussonniermatthias at gmail.com> wrote:
>
>> Hi all,
>>
>> As you may or may not be aware, with Python 3.6 the dictionary are
>> ordered by default. It is technically an implementation detail, though
>> some people would love for it not to.
>>
>> Regardless, IPython has for a long time pretty-printed the dictionary
>> with _sorted_ keys, this thus prevent to teach python and show that
>> dictionaries maintain order. Thus there is the question of wether we
>> should disable sorting keys while pretty-printing.
>>
>> https://github.com/ipython/ipython/issues/10110
>>
>> This seem like a minor change, but I'd like to know if some of you are
>> _relying_ on the ordering of dict when they are printed, or have
>> compelling arguments against (or for) removing sorting of the keys
>> before pretty_printing.
>>
>> If you care about the above subject, please have your voice heard in
>> above issue.
>>
>> Thanks,
>> --
>> Matthias
>> _______________________________________________
>> IPython-dev mailing list
>> IPython-dev at python.org
>> https://mail.python.org/mailman/listinfo/ipython-dev
>>
>
>
> _______________________________________________
> IPython-dev mailing list
> IPython-dev at python.org
> https://mail.python.org/mailman/listinfo/ipython-dev
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/ipython-dev/attachments/20170802/4f9aee24/attachment.html>