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| author | Serhiy Storchaka <storchaka@gmail.com> | 2021-12-05 20:42:50 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-12-05 20:42:50 (GMT) |
| commit | 446be166861b2f08f87f74018113dd98ca5fca02 (patch) | |
| tree | 72eed67ccf609faefac71afa67589866a3818843 /Lib/dataclasses.py | |
| parent | 1fd4de5bddbbf2a97cdbac4d298c89e1156bdc6c (diff) | |
| download | cpython-446be166861b2f08f87f74018113dd98ca5fca02.zip cpython-446be166861b2f08f87f74018113dd98ca5fca02.tar.gz cpython-446be166861b2f08f87f74018113dd98ca5fca02.tar.bz2 | |
bpo-45663: Fix is_dataclass() for dataclasses which are subclasses of types.GenericAlias (GH-29294)
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) |