[Python-Dev] How about updating OrderedDict in csv and configparser to regular dict?

[INADA Naoki]

I'm sorry, configparser is changed already.
https://bugs.python.org/issue33504

On Thu, Jan 31, 2019 at 4:52 PM INADA Naoki <songofacandy at gmail.com> wrote:
>
> Hi,
>
> csv.DictReader uses OrderedDict by default, from Python 3.6.
> But it doesn't make sense anymore, like namedtuple._asdict().
> How about changing default dict type back to regular dict.
>
> Python is widely used for handling learge data.  So I think
> changing default dict type to OrderedDict was performance
> and memory usage regression in 3.6.
>
> Additionally, configparser uses OrderedDict by default from Python 3.6 too.
>
> I am not sure about `parser['section1'] == parser['section2']` is not used yet.
> But we broke it once in 3.6 by changing dict to OrderedDict.  Are there any
> issue report caused by this backward incompatibility?
>
> And I think performance and memory efficiency is not so important for
> configparser, unlike csv.
>
> I'm
>
> * +1 about changing csv.DictReader's default dict type
> * +0.5 about changing configparser's default dict type.
>
> How do you think?
>
> Regards,
> --
> INADA Naoki  <songofacandy at gmail.com>



-- 
INADA Naoki  <songofacandy at gmail.com>