On Thu, 22 Jan 2009 14:13:34 -0800, Chris Rebert wrote: > On Thu, Jan 22, 2009 at 2:04 PM, Tobiah <t...@tobiah.org> wrote: >> Although it's trivial to program, I wondered whether >> there was a builtin or particularly concise way to >> express this idea: >> >>> a = [(1, 2), (3, 4), (5, 6)] >>> field[a, 2] >> [2, 4, 6] >> >> where field() is some made up function. > > Python 2.6 (r26:66714, Nov 18 2008, 21:48:52) > [GCC 4.0.1 (Apple Inc. build 5484)] on darwin > Type "help", "copyright", "credits" or "license" for more information. >>>> a= [(1, 2), (3, 4), (5, 6)] >>>> zip(*a) > [(1, 3, 5), (2, 4, 6)] >>>> zip(*a)[1] > (2, 4, 6)
That would be what I was after. Where can I read about this mysterious use of the '*'? It only works in the context of the zip() function. It's hard to understand how the interpreter handles that. Thanks, Toby -- http://mail.python.org/mailman/listinfo/python-list
