And that's just what he did until someone showed up to do the grunt work of porting to Python 3, at which point he co-operated with that person and helped make the port happen, just as he said he would. I suggest a more facts based narrative in the future.

List of all python3 PRs merged by the developer in minutes to hours: https://github.com/kovidgoyal/calibre/pulls?q=is%3Apr+py3