Great comments and better bug reports, just want to mention it actually says to always re-use Session in the wreq tutorial[0]. Perhaps it should be stated more prominently, repeated, or even both.

    For non-trivial applications, we’ll always want to use a Session to efficiently and correctly handle multiple requests.

    The Session API provides two important features:

    When we issue multiple HTTP requests to the same server, a Session will reuse TCP and TLS connections for us. (The simpler API we’ve discussed so far does not do this.) This greatly improves efficiency.

0: http://www.serpentine.com/wreq/tutorial.html#session