[TIP] Teaching pylint about keyword placeholders in string formatting

[Ben Finney]

Marius Gedminas <marius at gedmin.as> writes:

> For some reason I mislike the use of vars()/locals()/globals() for use
> cases other than debugging, so I tend to write
> 
>           spangulate("%(warble)s: %(foo)s%(bar)s [%(baz)d]"
>                      % dict(warble=warble, foo=foo, bar=bar, baz=baz))

That has each name *three* times rather than once. Adhering to DRY is
the main reason I prefer using ‘vars()’ for populating keyword
placeholders, and the above perversely subverts DRY.

Of course, it's the fact that the names aren't repeated (as Python
identifiers) that causes pylint to complain at the moment, so I look
forward to the reported ticket being resolved satisfactorily.

> and therefore never have the problem with pylint. (Though I prefer
> pyflakes. Fewer erroneous warnings, or at least I got that
> impression.)

I craft a configuration file for pylint (there's unfortunately no good
documentation on this file, but ‘pylint --generate-rcfile > foo.conf’
will give you an editable configuration file), so that the reports
better match project conventions.

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Ben Finney
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