This could also be easily modified to return n iterators, but was outside of my needs. Handy for splitting up the workload for use with multiple threads/processes.
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def divide(iterable, parts): ''' Partitions an iterable into parts number of lists. ''' items = list(iterable) seqs = [ for _ in xrange(parts)] while items: for i in xrange(parts): if not items: break seqs[i].append(items.pop()) return seqs