To make using it from python a bit easier, I wrote a simple file to read in the files, as well as to map parties and state IDs to names. I provide it below in case it proves useful to others!
Note that the script includes python-usable versions of: mappings from ICPSR state IDs to state abbreviations and state names, AND mappings from Political Party IDs to Party Names, which may be useful in their own right.
Edit: Updated link to a new host.
Edit: Updated link to a new host.