From 5ac960d6f4503dfbeb6493b5dfb0c64fc486a70c Mon Sep 17 00:00:00 2001
From: Laurent Mazuel <lmazuel@microsoft.com>
Date: Wed, 28 Jun 2017 18:07:03 -0700
Subject: isinstance(obj, (str, unicode)) to be Py2/3 compat

---
 src/isodate/isoduration.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/isodate/isoduration.py b/src/isodate/isoduration.py
index 6da69f5..c3cfc65 100644
--- a/src/isodate/isoduration.py
+++ b/src/isodate/isoduration.py
@@ -80,7 +80,7 @@ def parse_duration(datestring):
       The alternative format does not support durations with years, months or
       days set to 0.
     """
-    if not isinstance(datestring, basestring):
+    if not isinstance(datestring, (str, unicode)):
         raise TypeError("Expecting a string %r" % datestring)
     match = ISO8601_PERIOD_REGEX.match(datestring)
     if not match:
-- 
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