[Numpy-discussion] Numpy 'groupby'

Hi Everyone, First off, thanks for all your hard work on numpy, its a really great help! I was wondering if there was a standard 'groupby' in numpy, that similar to that in itertools. I know its not hard to write with np.diff, but I have found myself writing it on more than a couple of occasions, and wondered if there was a 'standarised' version I was missing out on?? Thanks, Mike