id attribute not always available

[svenevs]

Fixes #53.

I don't think "rage-replacing" xxx.id with getattr(xxx, "id", None) can be done / makes sense. Sometimes xxx.id is used as a key in a dictionary, etc. I only fixed the line that caused crashes for me.

Logically it should be equivalent though, and installing this locally pep8-naming no longer crashes :)

[svenevs]

^ Sorry for force-push, I did "id" rather than 'id' and since the CI hadn't even finished I thought I'd fix it real quick before you even saw ;)

[svenevs]

(to the watchers, sorry so much spam...CI ran on commit I force pushed away, which is why this will close and then repoen)

[svenevs]

Superseded by gh-55.