[genshii]

Hmm, maybe I need to think about this more, but since operations are a language feature (and could have any name, see custom operations), I don't think they could be attached to the filterql class like that.

You're right though, the naming of the `filter` method is confusing. I need to split off the filtering and applying of operations into two separate methods. And probably provide an additional `query` method like you said which would do what `filter` is doing now. Appreciate the feedback!