From f75ee9fb6e9c651ce49a438634b6e9ced0560e1b Mon Sep 17 00:00:00 2001
From: Stephen Huenneke <stephen.huenneke@gmail.com>
Date: Mon, 29 Jul 2013 14:42:47 -0700
Subject: [PATCH] Making sure we check for str/unicode.

---
 requests/models.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/requests/models.py b/requests/models.py
index 9289f3ba..730b9f5a 100644
--- a/requests/models.py
+++ b/requests/models.py
@@ -92,8 +92,8 @@ class RequestEncodingMixin(object):
         if parameters are supplied as a dict.
 
         """
-        if (not files) or isinstance(data, str):
-            return (None, None)
+        if (not files) or isinstance(data, basestring):
+            return None
 
         new_fields = []
         fields = to_key_val_list(data or {})