[docs] [issue36896] clarify in types.rst that FunctionTypes & co constructors don't have stable signature

Matthias Bussonnier <bussonniermatthias@gmail.com> added the comment: Victor recently implemented CodeType.replace(); which I believe will cover many of the usecase. Should I also send a PR that update the DocStrings of (some of) ? these objects? many people don't go and read the html docs... ---------- _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue36896> _______________________________________