is it possible to remap or modify ipython to give me $SHELL when I use the ! escape?

I don't want to have /bin/sh run my commands, I do开发者_开发技巧n't use it for many reasons, all of them utterly valid.

I would like to have /bin/zsh run my commands in python shells, specifically ipython 10.2

I don't think it's unreasonable to want an interactive shell to look at the users environment before running a subshell.

How can i get ipython to do this for me?