python-cachecontrol 0.11.4-1 (amd64 binary) in ubuntu wily

 CacheControl is a port of the caching algorithms in httplib2_ for use with
 requests_ session object.
 .
 It was written because httplib2's better support for caching is often
 mitigated by its lack of threadsafety. The same is true of requests in
 terms of caching.
 .
 This is the Python 2 library.