From 973e9cb54826062328f1c8650630819205ccfe8e Mon Sep 17 00:00:00 2001
From: Suraj Barkale <suraj@barkale.com>
Date: Tue, 15 May 2012 19:47:02 +0530
Subject: [PATCH] Remove sharing of base_headers config between sessions. Since
 base_headers is a dictionary, it's reference was shared with all instances of
 Session objects. Using deepcopy here should not incur large performance
 penalty.

---
 requests/sessions.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/requests/sessions.py b/requests/sessions.py
index dd670dd..aa90ecc 100644
--- a/requests/sessions.py
+++ b/requests/sessions.py
@@ -9,6 +9,7 @@ requests (cookies, auth, proxies).
 
 """
 
+from copy import deepcopy
 from .compat import cookielib
 from .cookies import cookiejar_from_dict, remove_cookie_by_name
 from .defaults import defaults
@@ -81,7 +82,7 @@ class Session(object):
         self.cert = cert
 
         for (k, v) in list(defaults.items()):
-            self.config.setdefault(k, v)
+            self.config.setdefault(k, deepcopy(v))
 
         self.init_poolmanager()
 
-- 
2.7.4