Re: [Python-ideas] History stepping in interactive session?

Steven D'Aprano writes:

I thought so too, but apparently the behaviour being talked about is a bash extension to readline. Adding it to Python would be a feature request, not a bug fix.

In that case, I think it's unfortunately that Python doesn't provide a way to warn about unimplemented stuff in .inputrc. Both on my Mac and on my Gentoo system, C-o simply does nothing.