memoryview works in both Python 2.7 and Python 3

isso/compat.py

@@ -9,13 +9,16 @@ except NameError:        # Python 3
     text_type = str
     string_types = (str, )
 
+try:
+    memoryview           # Python 2.7 and Python 3
+except NameError:
+    memoryview = buffer  # Python 2.6
+
 if not PY2K:
-    buffer = memoryview  # noqa undefined name 'memoryview' in Python 2.6
     filter, map, zip = filter, map, zip
     iteritems = lambda dikt: iter(dikt.items())  # noqa: E731
     from functools import reduce
 else:
-    buffer = buffer
     from itertools import ifilter, imap, izip
     filter, map, zip = ifilter, imap, izip
     iteritems = lambda dikt: dikt.iteritems()   # noqa: E731