[Python-projects] PyLint: scope of variable of list comprehension

[Sylvain Thénault]

On Wednesday 19 July à 21:37, Maarten ter Huurne wrote:
> 
> python-projects-bounces at lists.logilab.org wrote on 2006-07-19 09:25:07 PM:
> 
> > > But if I run this code in Python, there is no variable named "n" in
> > > the global scope. So it seems that in this respect, the "for" of a
> > > list comprehension / generator expression is different than the "for"
> > > statement.
> >
> > This is only true for generator expressions.  With list comprehensions
> > the name is "leaking"::
> 
> You are right.
> 
> I first encountered the problem with a generator expression which created a
> dictionary. Then I made the test case with a list, since that required less
> code. Then I noticed list comprehension triggers the same warning, but I forgot
> to verify that "n" was undefined (and in fact, it is "leaking" and thus
> defined).
> 
> So please ignore the part about list comprehension, but the bug is valid for
> generator expressions.

Yep. And it'll be also true for lists comprehensions in a near future (2.5?).
I add this to our tracker.

> (Does Debian have Python 2.4 as the default by now? ;)

not yet :/

-- 
Sylvain Thénault                               LOGILAB, Paris (France)
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