[Python-ideas] Re: dataclass field argument to allow converting value on init

That's clever, I'm a fan of that syntax. Quick question on it though - If you provide a `default` or `default_factory` to `field`, as well as `init_using`, how would that be handled? I'm thinking, `default_factory` would be made mutually exclusive, so you couldn't use it but `default` would just replace the default value in the `__init__`.