Hi all, I recently upgraded from Numpy 1.6.2 to 1.7.1 on my Debian testing, and then got a bug in a program that was previously working. It turned out that the problem comes from the np.insert function when the argument `axis=-1` is given. Here is a minimal example:
u = np.zeros((2,3,4)) ui = np.ones((2,3)) u = np.insert(u, 1, ui, axis=-1)
The last line should be equivalent to
u = np.insert(u, 1, ui, axis=2)
It was indeed the case in Numpy 1.6, but in 1.7.1 it raises a ValueError exception. Note that the problem seems specific to axis=-1, and not to all negative axis values, since the following example works as expected:
u = np.zeros((2,3,4)) ui = np.ones((2,4)) u = np.insert(u, 1, ui, axis=-2) # equivalent to axis=1
I didn't check on current master, so maybe things have changed since 1.7.1. If they have not, do you think a bug report would be relevant? Cheers, Félix