diff options
Diffstat (limited to 'Lib/dataclasses.py')
| -rw-r--r-- | Lib/dataclasses.py | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/dataclasses.py b/Lib/dataclasses.py index da06aa6..3f85d85 100644 --- a/Lib/dataclasses.py +++ b/Lib/dataclasses.py @@ -1211,7 +1211,7 @@ def _is_dataclass_instance(obj): def is_dataclass(obj): """Returns True if obj is a dataclass or an instance of a dataclass.""" - cls = obj if isinstance(obj, type) else type(obj) + cls = obj if isinstance(obj, type) and not isinstance(obj, GenericAlias) else type(obj) return hasattr(cls, _FIELDS) |