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

[Matthew Brett]

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?

Best,

Matthew