Forward port only Py3k relevant change in r65642 (giving it a Py3k NEWS entry anyway because of the difference in the changes between the two branches)
diff --git a/Lib/numbers.py b/Lib/numbers.py
index c72a23d..827c253 100644
--- a/Lib/numbers.py
+++ b/Lib/numbers.py
@@ -15,6 +15,8 @@
If you just want to check if an argument x is a number, without
caring what kind, use isinstance(x, Number).
"""
+ # Concrete numeric types must provide their own hash implementation
+ __hash__ = None
## Notes on Decimal