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Issues list
dataclass.__eq__ no longer errors on missing attributes in Python 3.13 3.13bugs and security fixes 3.14bugs and security fixes 3.15new features, bugs and security fixes stdlibPython modules in the Lib dir topic-dataclasses type-bugAn unexpected behavior, bug, or error
#134488 openedMay 22, 2025 bywillhcr
3.14 changes annotations behaviour for dataclasses.make_dataclass 3.14bugs and security fixes stdlibPython modules in the Lib dir topic-dataclasses type-bugAn unexpected behavior, bug, or error
#134370 openedMay 20, 2025 byrogerbinns
gh-133956 fix bug where
ClassVar
string annotation in@dataclass
caused incorrect__init__
generation awaiting changes topic-dataclasses #134073 openedMay 15, 2025 bydzherbLoading…
dataclasses
: Synthetic__init__
method on dataclass has brokenClassVar
annotation under some conditions. stdlib #133956 openedMay 12, 2025 byemcd
slotted dataclasses not calling descriptor fieldPython modules in the Lib dir topic-dataclasses type-bugAn unexpected behavior, bug, or error
__set__
stdlib #132946 openedApr 25, 2025 bythejcannon
Dataclasses erroring when descriptor has mutable default stdlibPython modules in the Lib dir topic-dataclasses type-bugAn unexpected behavior, bug, or error
#132559 openedApr 15, 2025 bythejcannon
IncorrectPython modules in the Lib dir topic-dataclasses type-bugAn unexpected behavior, bug, or error
__qualname__
in slotted dataclasses in__init_subclass__
stdlib #129915 openedFeb 9, 2025 bythejcannon
Breaking change ofbugs and security fixes 3.14bugs and security fixes stdlibPython modules in the Lib dir topic-dataclasses type-bugAn unexpected behavior, bug, or error
dataclasses.dataclass
comparison semantics in 3.13+ 3.13 #128294 openedDec 27, 2024 bydaskol
dataclasses fail to unpickle when there is an object cycle with a custom __hash__ function topic-dataclasses type-bugAn unexpected behavior, bug, or error
#125004 openedOct 5, 2024 bycharles-cooper
pickle.loads
will crash with self-references inside a custom hash function extension-modules #124937 openedOct 3, 2024 bycharles-cooper
Improve UX for mocking dataclasses that are problematic to instantiate topic-dataclasses type-featureA feature request or enhancement
#124176 openedSep 17, 2024 byncoghlan
Add examples forDocumentation in the Doc dir skip issue skip news topic-dataclasses
repr=...
usage indataclasses.rst
awaiting review docs #123118 openedAug 18, 2024 byegorsmthLoading…
gh-89529: disallowStale PR or inactive for long period of time. topic-dataclasses
default_factory
for fields in dataclasses without__init__
awaiting review staledataclass overriding a property in the parent class is broken stdlibPython modules in the Lib dir topic-dataclasses type-bugAn unexpected behavior, bug, or error
#121354 openedJul 3, 2024 bymarksandler2
dataclass(a=nan) == dataclass(a=nan) change in truthnes between 3.12 and 3.13 topic-dataclasses type-bugAn unexpected behavior, bug, or error
#120645 openedJun 17, 2024 byhroncok
AddA feature request or enhancement
dataclass_factory
argument todataclasses.make_dataclass
for custom dataclass transformation support topic-dataclasses type-feature #118974 openedMay 12, 2024 byXuehaiPan
Processing of fields in dataclasses is inconsistent with MRO stdlibPython modules in the Lib dir topic-dataclasses type-bugAn unexpected behavior, bug, or error
#108611 openedAug 29, 2023 byeltoder
2 tasks done
copy fails on collections.OrderedDict dataclass with required args 3.11only security fixes 3.12only security fixes 3.13bugs and security fixes stdlibPython modules in the Lib dir topic-dataclasses type-bugAn unexpected behavior, bug, or error
#105736 openedJun 13, 2023 byringohoffman
Dataclasses - Improve the performance ofbugs and security fixes performancePerformance or resource usage stdlibPython modules in the Lib dir topic-dataclasses type-featureA feature request or enhancement
_dataclass_{get,set}state
3.13 #103032 openedMar 25, 2023 bysobolevn
Add a Dataclass abstract base class for instance checking and type annotations stdlibPython modules in the Lib dir topic-dataclasses topic-typing type-featureA feature request or enhancement
#102699 openedMar 14, 2023 byNeilGirdhar
Dataclass descriptor behavior inconsistent stdlibPython modules in the Lib dir topic-dataclasses type-bugAn unexpected behavior, bug, or error
#102646 openedMar 13, 2023 byikonst
Order of non-default dataclass fields when some fields are @property. stdlibPython modules in the Lib dir topic-dataclasses type-bugAn unexpected behavior, bug, or error
#102559 openedMar 9, 2023 byNuno-Mota
Sharp edge in dataclass inheritance stdlibPython modules in the Lib dir topic-dataclasses type-bugAn unexpected behavior, bug, or error
#102546 openedMar 8, 2023 byhauntsaninja
contextlib.contextmanager
raisesdataclasses.FrozenInstanceError
when handling a frozen dataclass exception stdlib #99856 openedNov 28, 2022 bymattclay
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