fix compat.py

requests/compat.py

@@ -8,7 +8,7 @@ This module handles import compatibility issues between Python 2 and
 Python 3.
 """
 
-from .packages import chardet
+import chardet
 
 import sys
 
@@ -45,7 +45,8 @@ if is_py2:
     import cookielib
     from Cookie import Morsel
     from StringIO import StringIO
-    from .packages.urllib3.packages.ordered_dict import OrderedDict
+
+    from urllib3.packages.ordered_dict import OrderedDict
 
     builtin_str = str
     bytes = str