It's possible but I haven't tested it enough to iron out any kinks.
And right now the main routines are return-blocked by an environment variable (PYSH_ROOT) thats set when the first pysh wrapper is started.
Feel free to remove these and test how well it works for you.
EDIT:
I might have misunderstood, if they're in an import they wont be parsed right now, you would need to run pysh() in there too. I haven't tested so I'm not sure how this will work.