Breaking ground for PEP 3137 implementation:

Get rid of buffer().  Use memoryview() in its place where possible.
In a few places, do things a bit different, because memoryview()
can't slice (yet).
diff --git a/Lib/test/test_array.py b/Lib/test/test_array.py
index db029f3..5e4bde6 100755
--- a/Lib/test/test_array.py
+++ b/Lib/test/test_array.py
@@ -708,7 +708,7 @@
 
     def test_buffer(self):
         a = array.array(self.typecode, self.example)
-        b = bytes(buffer(a))
+        b = bytes(memoryview(a))
         self.assertEqual(b[0], a.tostring()[0])
 
     def test_weakref(self):