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Allow dynamic creation of generic dataclasses (GH-6319) (GH-6320)

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(cherry picked from commit 5a7092de12)

Co-authored-by: Ivan Levkivskyi <levkivskyi@gmail.com>
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Miss Islington (bot) 2018-04-01 04:33:13 -07:00 • committed by Ivan Levkivskyi
parent 9e96e7b24e
commit d063ad8962
2 changed files with 21 additions and 2 deletions
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4
Lib/dataclasses.py
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@ -1004,7 +1004,9 @@ def make_dataclass(cls_name, fields, *, bases=(), namespace=None, init=True,
anns[name] = tp
namespace['__annotations__'] = anns
cls = type(cls_name, bases, namespace)
# We use `types.new_class()` instead of simply `type()` to allow dynamic creation
# of generic dataclassses.
cls = types.new_class(cls_name, bases, {}, lambda ns: ns.update(namespace))
return dataclass(cls, init=init, repr=repr, eq=eq, order=order,
unsafe_hash=unsafe_hash, frozen=frozen)