How do I use vi keys in ipython under *nix?

Question

Currently in Bash I use set -o vi to enable vi mode in my bash prompt.

How do I get this going in ipython?

Note: If an answer applies t

Answer 1

I needed to be able to switch modes interactively in IPython 5 and I found you can do so by recreating the prompt manager on the fly:

a = get_ipython().configurables[0]; a.editing_mode='vi'; a.init_prompt_toolkit_cli()