Well, to me zip(*x) is unnatural, and it's inefficient when the arrays are long.
On Sun, Sep 8, 2013 at 10:45 AM, Alexander Belopolsky <alexander.belopol...@gmail.com> wrote: > > On Sun, Sep 8, 2013 at 9:32 PM, Guido van Rossum <gu...@python.org> wrote: >> >> - Parallel arrays or arrays of tuples? I think the API should require >> an array of tuples. It is trivial to zip up parallel arrays to the >> required format, while if you have an array of tuples, extracting the >> parallel arrays is slightly more cumbersome. > > > I agree with your conclusion but not with the rationale: converting between > array of tuples and parallel arrays is trivial both ways: > >>>> at = [(1,2,3), (4,5,6), (7,8,9), (10, 11, 12)] >>>> zip(*at) > [(1, 4, 7, 10), (2, 5, 8, 11), (3, 6, 9, 12)] >>>> zip(*_) > [(1, 2, 3), (4, 5, 6), (7, 8, 9), (10, 11, 12)] > > (Note that zip(*x) is basically transpose(x).) -- --Guido van Rossum (python.org/~guido) _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
