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| author | Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> | 2021-12-05 13:04:29 -0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-12-05 13:04:29 -0800 |
| commit | abceb66c7e33d165361d8a26efb3770faa721aff (patch) | |
| tree | d8cddf3e05dcc7782cfadedbed4184a8adb9ccb9 /Lib/dataclasses.py | |
| parent | f1dd5ed1f35a7ed5c3833c822e9965de2400d77e (diff) | |
| download | cpython-git-abceb66c7e33d165361d8a26efb3770faa721aff.tar.gz | |
bpo-45663: Fix is_dataclass() for dataclasses which are subclasses of types.GenericAlias (GH-29294)
(cherry picked from commit 446be166861b2f08f87f74018113dd98ca5fca02)
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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 fe4094b891..105a95b955 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) |