Michael Robellard <[email protected]> added the comment:
I can confirm that Juan Arrivillaga (juanpa.arrivillaga) workaround does work.
Given that it works, then wouldn't it be relatively trivial to do what
Thomas701 suggests and add a descriptor parameter to fields. Then apply the
descriptor after all the other work is done so that it doesn't get clobbered,
which is basically reproducing the workaround.
import dataclasses
@dataclasses.dataclass
class FileObject:
_uploaded_by: str = dataclasses.field(default=None, init=False)
def _uploaded_by_getter(self):
return self._uploaded_by
def _uploaded_by_setter(self, uploaded_by):
print('Setter Called with Value ', uploaded_by)
self._uploaded_by = uploaded_by
uploaded_by: str = field(default=None, descriptor=property(
FileObject._uploaded_by_getter,
FileObject._uploaded_by_setter))
p = FileObject()
print(p)
print(p.uploaded_by)
This would allow any descriptor to be applied to a dataclass field. If we allow
descriptor to accept an iterable as well you could have multiple descriptors
just like normal.
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versions: +Python 3.10, Python 3.11
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<https://bugs.python.org/issue39247>
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