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

[MinRK]

I'm pretty strongly in favor of keeping the sorting in our default
pretty-printing. It's extremely valuable for interacting with dictionaries
to have consistent, predictable display. There are plenty of ways to
illustrate dict ordering, such as by iterating through the dict , e.g.
`list(dict)`.

-Min

On Thu, Aug 3, 2017 at 6:38 PM, Carl Smith <carl.input at gmail.com> wrote:

> I'm with Thomas.
>
> On Wed, 2 Aug 2017 22:30 Wes Turner, <wes.turner at gmail.com> wrote:
>
>> Maybe a SORT_DICT_KEYS bool configuration setting? Really practically
>> only in order to teach:
>>
>> - dict
>>   - https://docs.python.org/3/tutorial/datastructures.html#dictionaries
>> - PYTHONHASHSEED / -R
>>   - https://docs.python.org/3/using/cmdline.html#envvar-PYTHONHASHSEED
>>   - https://docs.python.org/3/using/cmdline.html#cmdoption-R
>> - collections.OrderedDict (is backwards compatible)
>>   - https://docs.python.org/3/library/collections.html#
>> ordereddict-objects
>>
>>
>>
>> On Wednesday, August 2, 2017, 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
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>>>
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>
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