[Numpy-discussion] patch for structured array comparison bug
Tue Oct 19 14:00:54 CDT 2010
On Tue, Oct 19, 2010 at 2:24 AM, Pauli Virtanen <firstname.lastname@example.org> wrote:
> Tue, 19 Oct 2010 01:09:54 -0600, Charles R Harris wrote:
> > Just a quick look. I wasn't able to add comments to the code, maybe a
> > pull request would allow that or maybe you need to enable something.
> I think you can only add comments on commits, not in Github's compare
There are links to the commits at the top of the compare view, where the
commenting appears to work.
> But perhaps we should just recommend people filing pull requests right
Maybe describing one canonical way to do things (for newcomers, at least),
would make things clear? Currently
"ask for a code review or make a pull request," so I chose the first option.
> I'm not sure how broadcasting is supposed to work for
> > structured arrays so I will leave that to someone else. ISTR that the
> > SUN compiler is persnickety about the initialization of structures,
> > only accepts constants or some such. I'll try to track that down or
> > maybe someone here who is familiar with that compiler can comment.
> I suspect that this comparison code should refuse to compare arrays with
> shape(a) != shape(b), even if `a` and `b` are broadcastable to one
> another. The issue is that the broadcasting semantics work on the array
> level, but here the boolean sub-array is implicitly reduced to a single
I believe this would already be caught by the dtype comparison earlier in
You can also initialize
> dimensions = shape(self) + (-1,)
> and let PyArray_Newshape do the size calculation for you.
> I guess it's best to not initialize structures directly, if there is some
> suspicion that obscure compilers don't like it.
I made both of these changes, visible here:
It looks like to make a pull request, I need to merge my branch back into
master. Is that correct, or should I do a pull request from the branch?
Either way, adding a note here about that would be helpful:
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