diff --git a/requests/sessions.py b/requests/sessions.py
index 87320d6e..04d7d5dd 100644
--- a/requests/sessions.py
+++ b/requests/sessions.py
@@ -16,12 +16,24 @@ from .utils import header_expand
 from .packages.urllib3.poolmanager import PoolManager
 
 
+def dict_to_sequence(d):
+    """Returns an internal sequence dictionary update."""
+
+    if hasattr(d, 'items'):
+        d = d.items()
+
+    return d
+
+
 def merge_kwargs(local_kwarg, default_kwarg):
     """Merges kwarg dictionaries.
 
     If a local key in the dictionary is set to None, it will be removed.
     """
 
+
+
+
     if default_kwarg is None:
         return local_kwarg
 
diff --git a/requests/utils.py b/requests/utils.py
index 6952a996..4c94c661 100644
--- a/requests/utils.py
+++ b/requests/utils.py
@@ -14,7 +14,6 @@ import codecs
 import os
 import random
 import re
-import traceback
 import zlib
 from netrc import netrc, NetrcParseError
 
@@ -26,6 +25,15 @@ from .compat import basestring, bytes, str
 NETRC_FILES = ('.netrc', '_netrc')
 
 
+def dict_to_sequence(d):
+    """Returns an internal sequence dictionary update."""
+
+    if hasattr(d, 'items'):
+        d = d.items()
+
+    return d
+
+
 def get_netrc_auth(url):
     """Returns the Requests tuple auth for a given url from netrc."""