invalid-hash-return-type (PLE0309)#
Derived from the Pylint linter.
This rule is unstable and in preview. The --preview
flag is required for use.
What it does#
Checks for __hash__
implementations that return a value other than an integer.
Why is this bad?#
The __hash__
method should return an integer. Returning a different
type may cause unexpected behavior.
Note: bool
is a subclass of int
, so it's technically valid for __hash__
to
return True
or False
. However, for consistency with other rules, Ruff will
still raise when __hash__
returns a bool
.
Example#
Use instead: