Add `set editing-mode vi` to your ~/.inputrc and readline's keybindings resemble vi instead of emacs. You can also define your own keybidings as you like, like

Add `set editing-mode vi` to your ~/.inputrc and readline's keybindings resemble vi instead of emacs. You can also define your own keybidings as you like, like `Meta-Control-h: backward-kill-word` as seen in the example file in `info readline -n 'Sample Init File'`. Works with bash and whatever else that's using readline, like the python console, postgresql client, etc.