Python as network protocol

[Diez B. Roggisch]

> My point is that hacking can still be a fun and easy-going activity
> when one writes code for himself (almost) without regards to security
> and nasty things like that creeping in from the outside. I'm the king
> in my castle, although I'm fully aware of the fact that my castle
> might be ugly from the outside :)

Which is a relevant statement in the context of the OP seeking advice on 
*secure ways* of executing code in a restricted environment in exactly 
what way?

Diez