Re: Incompatible change discussion: Pretty printing of ordered dict.

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I'm with Thomas.

On Wed, 2 Aug 2017 22:30 Wes Turner, <[email protected]> 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 <
> [email protected]> 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
>> [email protected]
>> https://mail.python.org/mailman/listinfo/ipython-dev
>>
> _______________________________________________
> IPython-dev mailing list
> [email protected]
> https://mail.python.org/mailman/listinfo/ipython-dev
>

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<p dir=3D"ltr">I&#39;m with Thomas. </p>
<br><div class=3D"gmail_quote"><div dir=3D"ltr">On Wed, 2 Aug 2017 22:30 We=
s Turner, &lt;<a href=3D"mailto:[email protected]">[email protected]<=
/a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0=
 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Maybe a SORT_DICT_KE=
YS bool configuration setting? Really practically only in order to teach:<d=
iv><br></div><div>- dict</div><div>=C2=A0 -=C2=A0<a href=3D"https://docs.py=
thon.org/3/tutorial/datastructures.html#dictionaries" target=3D"_blank">htt=
ps://docs.python.org/3/tutorial/datastructures.html#dictionaries</a></div><=
div>-=C2=A0<span style=3D"color:rgb(34,34,34);font-family:Roboto-Regular,He=
lveticaNeue,Arial,sans-serif;font-size:14px">PYTHONHASHSEED / -R</span></di=
v><div><span style=3D"color:rgb(34,34,34);font-family:Roboto-Regular,Helvet=
icaNeue,Arial,sans-serif;font-size:14px">=C2=A0 -=C2=A0</span><font color=
=3D"#222222" face=3D"Roboto-Regular, HelveticaNeue, Arial, sans-serif"><spa=
n style=3D"font-size:14px"><a href=3D"https://docs.python.org/3/using/cmdli=
ne.html#envvar-PYTHONHASHSEED" target=3D"_blank">https://docs.python.org/3/=
using/cmdline.html#envvar-PYTHONHASHSEED</a></span></font></div><div><font =
color=3D"#222222" face=3D"Roboto-Regular, HelveticaNeue, Arial, sans-serif"=
><span style=3D"font-size:14px">=C2=A0 - <a href=3D"https://docs.python.org=
/3/using/cmdline.html#cmdoption-R" target=3D"_blank">https://docs.python.or=
g/3/using/cmdline.html#cmdoption-R</a></span></font></div><div><font color=
=3D"#222222" face=3D"Roboto-Regular, HelveticaNeue, Arial, sans-serif"><spa=
n style=3D"font-size:14px">- collections.OrderedDict (is backwards compatib=
le)</span></font></div><div><span style=3D"color:rgb(34,34,34);font-family:=
Roboto-Regular,HelveticaNeue,Arial,sans-serif;font-size:14px">=C2=A0 -=C2=
=A0<a href=3D"https://docs.python.org/3/library/collections.html#ordereddic=
t-objects" target=3D"_blank">https://docs.python.org/3/library/collections.=
html#ordereddict-objects</a></span></div><div><font color=3D"#222222" face=
=3D"Roboto-Regular, HelveticaNeue, Arial, sans-serif"><span style=3D"font-s=
ize:14px"><br></span></font></div><div><font color=3D"#222222" face=3D"Robo=
to-Regular, HelveticaNeue, Arial, sans-serif"><span style=3D"font-size:14px=
"><br></span></font><br>On Wednesday, August 2, 2017, Matthias Bussonnier &=
lt;<a href=3D"mailto:[email protected]" target=3D"_blank">busson=
[email protected]</a>&gt; wrote:<br><blockquote class=3D"gmail_quote" =
style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi =
all,<br>
<br>
As you may or may not be aware, with Python 3.6 the dictionary are<br>
ordered by default. It is technically an implementation detail, though<br>
some people would love for it not to.<br>
<br>
Regardless, IPython has for a long time pretty-printed the dictionary<br>
with _sorted_ keys, this thus prevent to teach python and show that<br>
dictionaries maintain order. Thus there is the question of wether we<br>
should disable sorting keys while pretty-printing.<br>
<br>
<a href=3D"https://github.com/ipython/ipython/issues/10110" target=3D"_blan=
k">https://github.com/ipython/ipython/issues/10110</a><br>
<br>
This seem like a minor change, but I&#39;d like to know if some of you are<=
br>
_relying_ on the ordering of dict when they are printed, or have<br>
compelling arguments against (or for) removing sorting of the keys<br>
before pretty_printing.<br>
<br>
If you care about the above subject, please have your voice heard in<br>
above issue.<br>
<br>
Thanks,<br>
--<br>
Matthias<br>
_______________________________________________<br>
IPython-dev mailing list<br>
<a>[email protected]</a><br>
<a href=3D"https://mail.python.org/mailman/listinfo/ipython-dev" target=3D"=
_blank">https://mail.python.org/mailman/listinfo/ipython-dev</a><br>
</blockquote></div>
_______________________________________________<br>
IPython-dev mailing list<br>
<a href=3D"mailto:[email protected]" target=3D"_blank">IPython-dev@pyt=
hon.org</a><br>
<a href=3D"https://mail.python.org/mailman/listinfo/ipython-dev" rel=3D"nor=
eferrer" target=3D"_blank">https://mail.python.org/mailman/listinfo/ipython=
-dev</a><br>
</blockquote></div>

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