Exit status 4 for Windows means that CouchDB is unable to open or locate file. I suppose you'd mess up couchpy project with couchpy view server. First one is just (afaik) client library, while second one is a part of another client library that ships with view server.
UPD: For Windows Python view server install with next line according your Python path:
[query_servers]
python=C:\Python27\Scripts\couchpy.exe