[Numpy-discussion] Adding generic dtypes
einstein.edison at gmail.com
Thu Jul 25 14:34:14 EDT 2019
Hi Sebastian; all:
I plan to attend the dtype meeting. Monday 11 AM California time is fine for me.
Get Outlook for iOS<https://aka.ms/o0ukef>
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
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.
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.
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