[Python-projects] Accepting variable refs in str % locals()

[skip at pobox.com]

Pylint complaints about unused variables when you have code like this:

    def f(a, c=None):
        b = 47
        return "a=%(a)s b=%(b)s" % locals()

though of course a and b are actually used.  I think the attached patch to
checkers/variables.py should improve the situation.  This is my first
attempt to extend pylint, so there are no doubt some questionable
constructs.

With the patch applied pylint only reports c as unused in the above
function.  I don't have a current checkout of pylint.  The patch is against
a snapshot from last October.  The __pkginfo__.py file reports the version
as (0, 13, 2).

-- 
Skip Montanaro - skip at pobox.com - http://www.webfast.com/~skip/

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