diff options
Diffstat (limited to 'Lib/dataclasses.py')
| -rw-r--r-- | Lib/dataclasses.py | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/Lib/dataclasses.py b/Lib/dataclasses.py index f778a27912..9020c905d1 100644 --- a/Lib/dataclasses.py +++ b/Lib/dataclasses.py @@ -1015,13 +1015,14 @@ def fields(class_or_instance): def _is_dataclass_instance(obj): """Returns True if obj is an instance of a dataclass.""" - return not isinstance(obj, type) and hasattr(obj, _FIELDS) + return hasattr(type(obj), _FIELDS) def is_dataclass(obj): """Returns True if obj is a dataclass or an instance of a dataclass.""" - return hasattr(obj, _FIELDS) + cls = obj if isinstance(obj, type) else type(obj) + return hasattr(cls, _FIELDS) def asdict(obj, *, dict_factory=dict): |