python/ruby question..

[bruce]

hi...

can someone point me to where/how i would go about calling a ruby app from a
python app, and having the python app being able to get a returned value
from the ruby script.

something like

test.py
 a = os.exec(testruby.rb)


testruby.py
 foo = 9
 return foo


i know this doesn't work... but i've been searching for hours on this with
no luck.... (and yeah, i'm relatively new to both ruby/python!!)

thanks