From d60845303bf877dde69ae2077d695646fc2a4579 Mon Sep 17 00:00:00 2001
From: Andrew Jesaitis <andrew@andrewjesaitis.com>
Date: Mon, 4 Mar 2013 11:07:29 -0700
Subject: [PATCH] Adds __attrs__ back to Session object

---
 requests/sessions.py | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/requests/sessions.py b/requests/sessions.py
index e5132de1..629b38ae 100644
--- a/requests/sessions.py
+++ b/requests/sessions.py
@@ -176,6 +176,10 @@ class Session(SessionRedirectMixin):
       200
     """
 
+    __attrs__ = [
+        'headers', 'cookies', 'auth', 'timeout', 'proxies', 'hooks',   
+        'params', 'verify', 'cert', 'prefetch']
+
     def __init__(self):
 
         #: A case-insensitive dictionary of headers to be sent on each
@@ -455,10 +459,7 @@ class Session(SessionRedirectMixin):
         self.adapters[prefix] = adapter
 
     def __getstate__(self):
-        if hasattr(self, '__attrs__'):
-            return dict((attr, getattr(self, attr, None)) for attr in self.__attrs__)
-        else:
-            return {}
+        return dict((attr, getattr(self, attr, None)) for attr in self.__attrs__)
 
     def __setstate__(self, state):
         for attr, value in state.items():