Patch# 1258 by Christian Heimes: kill basestring.
I like this because it makes the code shorter! :-)
diff --git a/Lib/_abcoll.py b/Lib/_abcoll.py
index 2a9676f..37e19f2 100644
--- a/Lib/_abcoll.py
+++ b/Lib/_abcoll.py
@@ -490,7 +490,8 @@
         return sum(1 for v in self if v == value)
 
 Sequence.register(tuple)
-Sequence.register(basestring)
+Sequence.register(str)
+Sequence.register(str8)
 Sequence.register(memoryview)