Pylint prefers list comprehension over filter...

[Stephen Hansen]

On Thu, May 5, 2016, at 07:46 PM, Dan Sommers wrote:
> On Thu, 05 May 2016 18:37:11 -0700, Stephen Hansen wrote:
> 
> >     ''.join(x for x in string if x.isupper())
> 
> > The difference is, both filter and your list comprehension *build a
> > list* which is not needed, and wasteful. The above skips building a
> > list, instead returning a generator ...
> 
> filter used to build a list, but now it doesn't (where "used to" means
> Python 2.7 and "now" means Python 3.5; I'm too lazy to track down the
> exact point(s) at which it changed):

Oh, didn't know that. Then again the OP was converting the output of
filter *into* a list, which wasted a list either way.

-- 
Stephen Hansen
  m e @ i x o k a i . i o