Raymond Hettinger <raymond.hettinger@gmail.com> added the comment: I agree with Steven that minor fact should not be given more weight. It has a specification in the Reference and it own FAQ entry. IMO it doesn't belong in tutorial because having a negative modulus is rare and because burying the use in details makes the tutorial harder to read. The intent of the tutorial is to have a structured, example driven, overview of the language. It necessarily omits uncommon cases and detailed specifications. Thanks for the suggestion, but I am going to close this one as Steven suggested. ---------- resolution: -> not a bug stage: patch review -> resolved status: open -> closed _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue43737> _______________________________________