Using python for writing models: How to run models in restricted python mode?

[Jeffrey Schwab]

vinjvinj wrote:
> I have so many things to do to get this to production and writing a
> mini language would be a full project in itself. :-<.
> 
> Is there an easy way to do this? If not, I'll go with the steps
> outlined in my other post.

Do you really think it will be faster to start parsing Python code, 
looking for potentially dangerous constructs?