Showing content from https://gist.github.com/1st1/37fdd3cc84cd65b9af3471b935b722df below:
A hack-ish way to fix dataclasses & get_type_hints() ยท GitHub
diff --git a/Lib/dataclasses.py b/Lib/dataclasses.py index 28e9f75127..ad3dc46b67 100644 --- a/Lib/dataclasses.py +++ b/Lib/dataclasses.py @@ -868,7 +868,7 @@ def _process_class(cls, init, repr, eq, order, unsafe_hash, frozen): # Include InitVars and regular fields (so, not ClassVars). flds = [f for f in fields.values() if f._field_type in (_FIELD, _FIELD_INITVAR)] - _set_new_attribute(cls, '__init__', + had_own_init = _set_new_attribute(cls, '__init__', _init_fn(flds, frozen, has_post_init, @@ -878,6 +878,9 @@ def _process_class(cls, init, repr, eq, order, unsafe_hash, frozen): '__dataclass_self__' if 'self' in fields else 'self', )) + if not had_own_init: + cls.__init__.__module__ = cls.__module__ + cls.__init__.__generated__ = True # Get the fields as a list, and include only real fields. This is # used in all of the following methods. diff --git a/Lib/typing.py b/Lib/typing.py index 445a42492b..3f6a916b6c 100644 --- a/Lib/typing.py +++ b/Lib/typing.py @@ -978,7 +978,10 @@ def get_type_hints(obj, globalns=None, localns=None): if isinstance(obj, types.ModuleType): globalns = obj.__dict__ else: - globalns = getattr(obj, '__globals__', {}) + if hasattr(obj, '__generated__'): + globalns = sys.modules[obj.__module__].__dict__ + else: + globalns = getattr(obj, '__globals__', {}) if localns is None: localns = globalns elif localns is None:
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