What am I doing wrong here? >>> import operator >>> import itertools >>> vals = [(1, 11), (2, 12), (3, 13), (4, 14), (5, 15), ... (1, 16), (2, 17), (3, 18), (4, 19), (5, 20)] >>> for k, g in itertools.groupby(iter(vals), operator.itemgetter(0)): ... print k, [i for i in g] ... 1 [(1, 11)] 2 [(2, 12)] 3 [(3, 13)] 4 [(4, 14)] 5 [(5, 15)] 1 [(1, 16)] 2 [(2, 17)] 3 [(3, 18)] 4 [(4, 19)] 5 [(5, 20)]
What I want is tuples starting with identical numbers to be grouped. I cannot figure out why this is not working. If anyone has any insights, I would appreciate it. - Alex Ross -- http://mail.python.org/mailman/listinfo/python-list