diff options
| -rw-r--r-- | Lib/numbers.py | 2 | ||||
| -rw-r--r-- | Misc/NEWS | 6 |
2 files changed, 8 insertions, 0 deletions
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 @@ class Number(metaclass=ABCMeta): 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 @@ -30,6 +30,12 @@ Core and Builtins Library ------- +- Issue #2235: numbers.Number now blocks inheritance of the default id() + based hash because that hash mechanism is not correct for numeric types. + All concrete numeric types that inherit from Number (rather than just + registering with it) must explicitly provide a hash implementation in + order for their instances to be hashable. + - Issue #2676: in the email package, content-type parsing was hanging on pathological input because of quadratic or exponential behaviour of a regular expression. |