Can Python run on the Internet

[John Mowbray]

I'd like to use Python in my classes, but some students do not have a 
pc.  They do have access to Internet-connected systems, though.  Is 
there a site someplace on the Internet (preferably a web server) where 
someone can submit a Python program to be run?  Telnet may be possible 
to use, but a browser would be ideal.

John