Re: Pylint prefers list comprehension over filter...

From	Terry Reedy <tjreedy@udel.edu>
Newsgroups	comp.lang.python
Subject	Re: Pylint prefers list comprehension over filter...
Date	2016-05-10 15:47 -0400
Message-ID	<mailman.575.1462909641.32212.python-list@python.org> (permalink)
References	(4 earlier) <mailman.489.1462671648.32212.python-list@python.org> <e309810a-d9a7-42b9-8e9f-14b8c03ab482@googlegroups.com> <5731f70f$0$1590$c3e8da3$5496439d@news.astraweb.com> <f1ca2718-6178-4fa7-9b67-ca697ae9ed43@googlegroups.com> <ngtdru$cpq$1@ger.gmane.org>

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On 5/10/2016 11:35 AM, pcmanticore@gmail.com wrote:

> The bad-builtin check is now an extension, so using the first case
> would enable it.

The 'old' (not 'bad') builtin check should include using map instead of 
a comprehension.  The check should also pay attention to whether the 
function argument is an existing function or a one newly created with a 
lambda expression.  "'lambda' in <argument expression>"

I think filter(None, iterable) (== filter(bool, iterable)) should be 
separately flagged as a style point.  It is a hack that became unneeded 
when bool was added.

> Another thing that is going to change with the next release is
> the introduction of tiers. Basically, pylint overwhelms the user
> right now with its enabled checks and we're trying to split these
> into tiers, as seen in the following:

This looks good.

-- 
Terry Jan Reedy

Thread

Re: Pylint prefers list comprehension over filter... Terry Reedy <tjreedy@udel.edu> - 2016-05-07 21:40 -0400
  Re: Pylint prefers list comprehension over filter... Claudiu Popa <pcmanticore@gmail.com> - 2016-05-10 06:51 -0700
    Re: Pylint prefers list comprehension over filter... Steven D'Aprano <steve@pearwood.info> - 2016-05-11 00:58 +1000
      Re: Pylint prefers list comprehension over filter... pcmanticore@gmail.com - 2016-05-10 08:35 -0700
        Re: Pylint prefers list comprehension over filter... Terry Reedy <tjreedy@udel.edu> - 2016-05-10 15:47 -0400
        Re: Pylint prefers list comprehension over filter... Chris Angelico <rosuav@gmail.com> - 2016-05-11 06:22 +1000
    Re: Pylint prefers list comprehension over filter... Steven D'Aprano <steve@pearwood.info> - 2016-05-11 01:20 +1000
    Re: Pylint prefers list comprehension over filter... Terry Reedy <tjreedy@udel.edu> - 2016-05-10 15:34 -0400
      Re: Pylint prefers list comprehension over filter... DFS <nospam@dfs.com> - 2016-05-10 16:42 -0400

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