[Numpy-discussion] Adding generic dtypes

[Sebastian Berg]

Hi Hameer, all,

sorry for the super late follow-up. Not that there is any content, but
I just put this up quickly:

https://hackmd.io/xSYBZI-cQ-etapoExfM1Cg

a bit also because I am not sure if the zoom link will work, so I want
to be able to update it.

See you,

Sebastian



On Thu, 2019-07-25 at 18:34 +0000, Hameer Abbasi wrote:
> Hi Sebastian; all:
> 
> I plan to attend the dtype meeting. Monday 11 AM California time is
> fine for me.
> 
> Best regards,
> Hameer Abbasi
> 
> Get Outlook for iOS
>  
> From: NumPy-Discussion <
> numpy-discussion-bounces+einstein.edison=gmail.com at python.org> on
> behalf of Sebastian Berg <sebastian at sipsolutions.net>
> Sent: Thursday, July 25, 2019 11:23 pm
> To: numpy-discussion at python.org
> Subject: Re: [Numpy-discussion] Adding generic dtypes
>  
> Hey, 
> 
> On Thu, 2019-07-25 at 11:35 -0600, Charles R Harris wrote: 
> > Hi All, 
> > 
> > The possibility of disabling default creation of object arrays has 
> > come up again. I'm wondering if one way to get there is to allow 
> > generic dtypes. The `numpy/core/numerictypes.py` module defines a 
> > hierarchy, and if we could allow things like `dtype=integer` or 
> > `dtype=no_object` and such we would gain more control over the 
> > resulting array types. At some point we could make `no_object` the 
> > default if we so desired. 
> > 
> > Thoughts? 
> 
> personally, that is what I am currently thinking along. I was
> calling 
> them AbstractDTypes. These would also (probably mainly) be used for 
> type promotion during ufunc calls (ufunc type resolution). 
> 
> OTOH, for `no_object` itself, I feel it would be OK with just
> special 
> case it, since the I do believe the plan should be to deprecate it. 
> 
> I have to think a bit about how "flexible" dtypes come in (and value 
> based promotion, which is a bit of a funny beast). 
> 
> I would like to plan a zoom meeting beginning of next week to
> discuss 
> this type of thing a bit more. Maybe Monday at 11 California time,
> but 
> right now I am very flexible, so whoever would be interested, feel
> free 
> to shoot me a mail to move things. 
> Not sure how concrete things will be, but without talking about it,
> it 
> is difficult for me to settle design ideas a bit more. 
> 
> Best, 
> 
> Sebastian 
> 
> 
> > 
> > Chuck 
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