Is there any solution in PYTHON?

[A]

Hi,
I have a program that downloads some web pages. Sometimes there is a poor internet 
connection and my script freezes( hangs) and does not download ALL pages.
Is there any solution how to test if the program works and if not re-start it from the point 
where it stopped?
Or simply how to download ALL pages eventhough there is a timeout connection( can be 
of any value)?
Thanks for help
Ladislav