[Numpy-discussion] It looks like Py 3.5 will include a dedicated infix matrix multiply operator

[Chris Laumann]

That’s great. 

Does this mean that, in the not-so-distant future, the matrix class will go the way of the dodos? I have had more subtle to fix bugs sneak into code b/c something returns a matrix instead of an array than almost any other single source I can think of. Having two almost indistinguishable types for 2d arrays with slightly different semantics for a small subset of operations is terrible.

Best, C


-- 
Chris Laumann
Sent with Airmail

On March 14, 2014 at 7:16:24 PM, Christophe Bal (projetmbc at gmail.com) wrote:

This id good for Numpyists but this will be another operator that good also help in another contexts.

As a math user, I was first very skeptical but finally this is a good news for non Numpyists too.

Christophe BAL

Le 15 mars 2014 02:01, "Frédéric Bastien" <nouiz at nouiz.org> a écrit :
This is great news. Excellent work Nathaniel and all others!

Frédéric

On Fri, Mar 14, 2014 at 8:57 PM, Aron Ahmadia <aron at ahmadia.net> wrote:
> That's the best news I've had all week.
>
> Thanks for all your work on this Nathan.
>
> -A
>
>
> On Fri, Mar 14, 2014 at 8:51 PM, Nathaniel Smith <njs at pobox.com> wrote:
>>
>> Well, that was fast. Guido says he'll accept the addition of '@' as an
>> infix operator for matrix multiplication, once some details are ironed
>> out:
>>   https://mail.python.org/pipermail/python-ideas/2014-March/027109.html
>>   http://legacy.python.org/dev/peps/pep-0465/
>>
>> Specifically, we need to figure out whether we want to make an
>> argument for a matrix power operator ("@@"), and what
>> precedence/associativity we want '@' to have. I'll post two separate
>> threads to get feedback on those in an organized way -- this is just a
>> heads-up.
>>
>> -n
>>
>> --
>> Nathaniel J. Smith
>> Postdoctoral researcher - Informatics - University of Edinburgh
>> http://vorpus.org
>> _______________________________________________
>> NumPy-Discussion mailing list
>> NumPy-Discussion at scipy.org
>> http://mail.scipy.org/mailman/listinfo/numpy-discussion
>
>
>
> _______________________________________________
> NumPy-Discussion mailing list
> NumPy-Discussion at scipy.org
> http://mail.scipy.org/mailman/listinfo/numpy-discussion
>
_______________________________________________
NumPy-Discussion mailing list
NumPy-Discussion at scipy.org
http://mail.scipy.org/mailman/listinfo/numpy-discussion
_______________________________________________  
NumPy-Discussion mailing list  
NumPy-Discussion at scipy.org  
http://mail.scipy.org/mailman/listinfo/numpy-discussion  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/numpy-discussion/attachments/20140314/716e31c5/attachment.html>