SyntaxError on line 259 (with python 3)
See https://github.com/kfogel/OneTime/issues/31. I think the issue there is just that the person is using a very old version of OneTime (on the other hand, my bad for not making an official release for so long!).
OneTime has moved over here to code.librehq.com GitLab, but there are still some open issue tickets and PRs over at GitHub. I haven't ported them all over; we'll just improvisatorily refer to them from here until they're closed. New tickets should be filed here, of course.