Oh, I was not clear then. I did rewrite it. The question is, why to store it in the family file if the bot checks (and can check) itself. This is pure redundance,

The version number tells pywikipediabot what functions will work with
the Wiki, for a version number, check Special:Version, and you could
just update the version number at the bottom of the family file, or
re-write it, to stop pybot harassing you.