[issue34363] dataclasses.asdict() mishandles dataclass instance attributes that are instances of subclassed typing.NamedTuple
Eric V. Smith
report at bugs.python.org
Thu Aug 9 20:49:30 EDT 2018
Eric V. Smith <eric at trueblade.com> added the comment:
Maybe do both, then. Also, it's probably better for performance reasons (I know: premature optimization and all that ...):
@@ -1018,8 +1018,10 @@ def _asdict_inner(obj, dict_factory):
value = _asdict_inner(getattr(obj, f.name), dict_factory)
result.append((f.name, value))
return dict_factory(result)
- elif isinstance(obj, (list, tuple)):
+ elif type(obj) in (list, tuple):
return type(obj)(_asdict_inner(v, dict_factory) for v in obj)
+ elif isinstance(obj, (list, tuple)):
+ return type(obj)(*[_asdict_inner(v, dict_factory) for v in obj])
elif isinstance(obj, dict):
return type(obj)((_asdict_inner(k, dict_factory), _asdict_inner(v, dict_factory))
for k, v in obj.items())
I guess we could argue it's a bug in nametuples, but I don't see that getting us very far.
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<https://bugs.python.org/issue34363>
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