Rails - Jun 2006 - Interactive Processing of print

For example, I have a python program that does

print "hello"
time.sleep(10)
print "world"

and i want to print this on ruby

"hello foo"
(wait 10 seconds)
"world foo"

I tried :

IO.popen("python example.py") do |p|
    p.each do |line|
        puts line + "foo"
    end
end

and it does everything except , it waits the 10 seconds before it
begins processing so it is not interactive

i mainly want to process a realtime running application (from any 
programming language) that prints many statements which I would like to 
intercept and print to the site

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