[Numpy-discussion] Change in behavior of np.concatenate for upcoming release

[Nathaniel Smith]

On Wed, Sep 12, 2012 at 2:46 PM, Matthew Brett <matthew.brett at gmail.com> wrote:
> Hi,
>
> I just noticed that this works for numpy 1.6.1:
>
> In [36]: np.concatenate(([2, 3], [1]), 1)
> Out[36]: array([2, 3, 1])
>
> but the beta release branch:
>
> In [3]: np.concatenate(([2, 3], [1]), 1)
> ---------------------------------------------------------------------------
> IndexError                                Traceback (most recent call last)
> /Users/mb312/<ipython-input-3-0fa244c8aaa8> in <module>()
> ----> 1 np.concatenate(([2, 3], [1]), 1)
>
> IndexError: axis 1 out of bounds [0, 1)
>
> In the interests of backward compatibility maybe it would be better to
> raise a warning for this release, rather than an error?

Yep, that'd be a good idea. Want to write a patch? :-)

-n