2011/12/25 Jordi Gutiérrez Hermoso <jordigh@octave.org>
I have been instructed to bring this issue to the mailing list:
http://projects.scipy.org/numpy/ticket/1994
The issue is this corner case:
idx = [] x = np.array([]) x[idx] #works array([], dtype=float64) x[:, idx] #works array([], dtype=float64)
x = np.ones((5,0)) x[idx] #works array([], shape=(0, 0), dtype=float64) x[:, idx] #doesn't work Traceback (most recent call last): File "<ipython-input-27-7038691cb565>", line 1, in <module> x[:, idx] #doesn't work IndexError: invalid index
This is obviously inconsistent, but I think just fixing this one case is not enough; unexpected behavior with empty inputs/indexes keeps coming up. Do we need a clear set of rules that all functions follow and tests to ensure these rules are actually followed, or not? Ralf