Add something to the docs about hooks on Session()
@@ -458,6 +458,15 @@ Let's print some request method arguments at runtime::
http://httpbin.org
<Response [200]>
+You can also assign hooks to a ``Session`` instance. The hook will then be
+called on every request made to the session. For example::
+
+ >>> s = requests.Session()
+ >>> s.hooks = dict(response=print_url)
+ >>> s.get('http://httpbin.org')
+ http://httpbin.org
+ <Response [200]>
+
.. _custom-auth:
Custom Authentication
