[Python-3000-checkins] r60206 - in python/branches/py3k: Doc/library/functions.rst Doc/library/itertools.rst Lib/heapq.py Lib/test/test_builtin.py Lib/test/test_iter.py Lib/test/test_itertools.py Misc/NEWS Modules/itertoolsmodule.c Python/bltinmo

[Guido van Rossum]

On Jan 22, 2008 3:25 PM, raymond.hettinger
<python-3000-checkins at python.org> wrote:
> Author: raymond.hettinger
> Date: Wed Jan 23 00:25:35 2008
> New Revision: 60206
>
> Modified:
>    python/branches/py3k/Doc/library/functions.rst
>    python/branches/py3k/Doc/library/itertools.rst
>    python/branches/py3k/Lib/heapq.py
>    python/branches/py3k/Lib/test/test_builtin.py
>    python/branches/py3k/Lib/test/test_iter.py
>    python/branches/py3k/Lib/test/test_itertools.py
>    python/branches/py3k/Misc/NEWS
>    python/branches/py3k/Modules/itertoolsmodule.c
>    python/branches/py3k/Python/bltinmodule.c
> Log:
> Replace map(None, *iterables) with zip(*iterables).

Cool!

(a) This should be easy to backport to 2.6 -- in -3 mode map() and
imap() should warn if the func argument is None.

(b) What about filter(None, ... )?

(c) What about map(None, one_iterable)? This doesn't return the same
thing as zip(one_iterable) -- it returns the same as
list(one_iterable).

-- 
--Guido van Rossum (home page: http://www.python.org/~guido/)