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"all but last n" function for generators
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| from itertools import tee, imap, izip, islice | |
| from operator import itemgetter | |
| def all_but_last_n(it,n): | |
| it1, it2 = tee(it,2) | |
| return imap(itemgetter(0),izip(it1,islice(it2,n,None))) | |
| assert [0,1,2] == list(all_but_last_n(xrange(5),2)) |
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