I was wondering if there is a function, or something, that would allow me to run another .py file from the script I am running? Sort of like "import", but being able to do it more then once.

Sort of like classes in Java or C, that allow you to break up the program into parts and have all the parts reference each other?

I have found semi-functional ways to do this using import by:
import stuff
...(Runs the stuff file)
del stuff
continues program, 
but being able to do "import stuff" again
Anyhow, I'm just curious for an more effective method.