Updated PEP 372 for Python 3

pep-0372.txt

@@ -151,6 +151,37 @@ New methods not available on dict:
     kicks in.
 
 
+Python 3 Version
+================
+
+The Python 3 version of the ``odict`` returns dictionary views rather
+than lists for ``odict.keys()``, ``odict.values()`` and ``odict.items()``.
+The keys-view is equivalent to a regular key view but supports the following
+extra or changed operations:
+
+``odict_keys.__getitem__(index)``
+
+    Returns the key for an index.  This is equivalent to ``odict.byindex(index) ``
+
+``odict_keys.index(key)``
+
+    Returns the index for a key.  This exists for compatibility with the
+    `Sequence` abstract base class and is equivalent to ``odict.index(key)``.
+
+``odict_keys.__iter__()``
+
+    Has the same semantics as ``odict.__iter__()``
+
+``odict_keys.__reversed__()``
+
+    Has the same semantics as ``odict.__reversed__()``
+
+``odict_keys.__cmp__()`` / ``odict_keys.__eq__()`` / ``odict_keys.__ne__()``
+
+    Same semantics as the equivalent ``odict`` operation.  Eg: when compared
+    to another odict keys-view the ordering is taken into account.    
+
+
 Questions and Answers
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