typing.Set is not supported

@add_schema
@dataclass
class Stuff:
    id: str
    items: Set[str]

The above fails with TypeError: typing.Set[str] is not a dataclass and cannot be turned into one.

I often use sets to ensure de-duplication, so it would be nice if it actually constructed a set every time.

[lovasoa]

let’s keep this open. Once the feature is implemented in marshmallow and we check it works with marshmallow dataclass, we’ll close this.

[mivade]

As a workaround (not for sets, but for the frozen aspect) you should be able to specify frozen=False in the dataclass decorator. Of course this only works if you want every member of the instance to be immutable.