how to determine if webpage has been modified
just take snapshots of the files with MD5 or SHA1...if the values differ the next time you check, then they are modified.
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!