This patch cleans up the usage of map() in the standard
library. Among other things, it removes several usages
of things like map(None, x), as well as simplifying a
number of map(lambda: ..., x) expressions.

This patch is against r47124.

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Some cases are definately an improvement.

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Which ones would you like to see reverted (ie, which ones
are not an improvement)? I've found some more cases that can
be improved, so a new version of the patch will be on the
way shortly.

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There are none I would suggest reverting; it is just that 
some are clear wins and others are not so important.

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Updated the patch to r47131 and added a bunch of new cleanups.

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map(None, ...) should definitely be expunged. The others
should be addressed on a case-by-case basis. I'll have a
read-through of the patch. 

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Can wait until 2.6.

and now it is 2.6 ?

May even be too late for 2.6. :)

i just wanted to get rid of one "python2.6 -3" warning in string and
found that a patch was already waiting. from this thing i conclude
smaller patches might get committed earlier , do they ?

On Fri, Jul 18, 2008 at 8:42 PM, Georg Brandl <report@bugs.python.org> wrote:
>
> Georg Brandl <georg@python.org> added the comment:
>
> May even be too late for 2.6. :)
>
> _______________________________________
> Python tracker <report@bugs.python.org>
> <http://bugs.python.org/issue1513299>
> _______________________________________
>

That is true. Barry might not want to allow a large catch-all patch; but
since those changes are not adding new features, simple small ones can
certainly get in before beta3.

so i add a one liner replacing map(None with list ?

On 7/18/08, Georg Brandl <report@bugs.python.org> wrote:
>
>  Georg Brandl <georg@python.org> added the comment:
>
>
> That is true. Barry might not want to allow a large catch-all patch; but
>  since those changes are not adding new features, simple small ones can
>  certainly get in before beta3.
>
>
>  _______________________________________
>  Python tracker <report@bugs.python.org>
>  <http://bugs.python.org/issue1513299>
>  _______________________________________
>

I can replace those too.

it is only one in string.py, but then again it is save to do.

thanks

On 7/18/08, Georg Brandl <report@bugs.python.org> wrote:
>
>  Georg Brandl <georg@python.org> added the comment:
>
>
> I can replace those too.
>
>
>  _______________________________________
>  Python tracker <report@bugs.python.org>
>  <http://bugs.python.org/issue1513299>
>  _______________________________________
>

OK, I nixed the "simple" uses of map(None, a).

http://bugs.python.org/issue3390 is similar trivial , replacing has_key by in
(this small patches might be considered tweaking the bugfix statistic)

i am off now (tell me if you think i should stay there)

On 7/18/08, Georg Brandl <report@bugs.python.org> wrote:
>
>  Georg Brandl <georg@python.org> added the comment:
>
>
> OK, I nixed the "simple" uses of map(None, a).
>
>
>  _______________________________________
>  Python tracker <report@bugs.python.org>
>  <http://bugs.python.org/issue1513299>
>  _______________________________________
>

msg69981 refers to #3390 which was closed fixed for has_key.  As this is similar could this go into 3.2 subject to acceptance?  The patch file is really a list of one line changes to get rid of map.

I'll have a look.

Committed what was left applicable of the patch in r87020.