[Numpy-discussion] Inconsistent behavior for ufuncs in numpy v1.10.X

[Solbrig,Jeremy]

The problem isn’t specifically with _optinfo.  _optinfo losing information is just a symptom of the fact that __array_prepare__, __array_wrap__, and __array_finalize__ do not appear to be working as documented.  So far as I can tell, there is no way to access attributes of subclasses when using mathematical operators so it is impossible to maintain subclasses that contain additional attributes.



On 1/26/16, 10:45 AM, "NumPy-Discussion on behalf of Sebastian Berg" <numpy-discussion-bounces at scipy.org on behalf of sebastian at sipsolutions.net> wrote:

>was changed to something like:
>
>        masked_result._update_from(result)
>
>My guess is almost that this fixed some other bug (but you should
>probably check git blame to see why it was put in). It might be that
>_optinfo should be handled more specifically. It seems like a very
>weird feature to me though when the info is always copied from the left
>operand...