Reduce Hathi File Python Script

There are several scripts, each with its own purpose, all written in Python, using an Enthought Python 2.7 distribution. One script uses regular expressions to collect IDs from Hathi Trust search results pages, then uses those IDs, which represent aggregate records sometimes consisting of multiple scanned documents, to collect the individual Hathi Trust Identifiers for each item in the search results. These identifiers are compared in another script to a monthly Hathi File, which then outputs the final data set.