I have snapshots of multiple webpages taken at 2 times. What is a reliable method to determine which webpages have been modified? 
I can't rely on something like an RSS feed, and I need to ignore minor noise like date text.
Ideally I am looking for a Python solution, but an intuitive algorithm would also be great.
Thanks!
just take snapshots of the files with MD5 or SHA1...if the values differ the next time you check, then they are modified.
how to determine if webpage has been modified