Patch# 1258 by Christian Heimes: kill basestring.
I like this because it makes the code shorter! :-)
diff --git a/Lib/test/test_pwd.py b/Lib/test/test_pwd.py
index 7abf905..358b8b3 100644
--- a/Lib/test/test_pwd.py
+++ b/Lib/test/test_pwd.py
@@ -13,19 +13,19 @@
         for e in entries:
             self.assertEqual(len(e), 7)
             self.assertEqual(e[0], e.pw_name)
-            self.assert_(isinstance(e.pw_name, basestring))
+            self.assert_(isinstance(e.pw_name, str))
             self.assertEqual(e[1], e.pw_passwd)
-            self.assert_(isinstance(e.pw_passwd, basestring))
+            self.assert_(isinstance(e.pw_passwd, str))
             self.assertEqual(e[2], e.pw_uid)
             self.assert_(isinstance(e.pw_uid, int))
             self.assertEqual(e[3], e.pw_gid)
             self.assert_(isinstance(e.pw_gid, int))
             self.assertEqual(e[4], e.pw_gecos)
-            self.assert_(isinstance(e.pw_gecos, basestring))
+            self.assert_(isinstance(e.pw_gecos, str))
             self.assertEqual(e[5], e.pw_dir)
-            self.assert_(isinstance(e.pw_dir, basestring))
+            self.assert_(isinstance(e.pw_dir, str))
             self.assertEqual(e[6], e.pw_shell)
-            self.assert_(isinstance(e.pw_shell, basestring))
+            self.assert_(isinstance(e.pw_shell, str))
 
             # The following won't work, because of duplicate entries
             # for one uid