A question

[septe@...]

I know that Python can be sandboxed and embedded into programs.  
What I'd like to know is if I create a program, a game that uses scripts 
that are used by other people, can I control Python to the extent where 
the users can't use Python specific functions such as accessing files on 
a hard drive or other OS functions?  In other words, I want to control 
which part of Python that users can access besides the functions I 
create for their use.

Any help on this will be greatly appreciated.

Gerald Florence