Indexing list of lists

[David Eppstein]

In article <95b4b9ac.0309161015.6a0567a7 at posting.google.com>,
 hildegarde_roth at yahoo.de (Hilde Roth) wrote:

> This may have been asked before but I can't find it. If I have
> a rectangular list of lists, say, l = [[1,10],[2,20],[3,30]], is 
> there a handy syntax for retrieving the ith item of every sublist?
> I know about [i[0] for i in l] but I was hoping for something more
> like l[;0].

>>> l = [[1,10],[2,20],[3,30]]
>>> zip(*l)[0]
(1, 2, 3)

-- 
David Eppstein                      http://www.ics.uci.edu/~eppstein/
Univ. of California, Irvine, School of Information & Computer Science