itertools.izip brokeness

bonono at bonono at
Tue Jan 3 07:25:28 EST 2006

Paul Rubin wrote:
> bonono at writes:
> > map(None,[1,2,3],[4,5]) gives [(1,4),(2,5),(3,None)]
> I didn't know that until checking the docs just now.  Oh man, what a
> hack!  I always thought Python should have a built-in identity
> function for situations like that.  I guess it does the above instead.
> Thanks.  Jeez ;-)
Of course, for OP's particular case, I think a specialized func() is
even better, as the None are turned into "" in the process which is
needed for string operation.

map(lambda *arg: tuple(map(lambda x: x is not None and x or "", arg)),

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