New submission from Daniel Lindeman :
Currently, all fields in dataclasses can be frozen by passing frozen=True to
the decorator. There are cases where it would be useful to have some fields be
mutable, and others immutable. By using a strategy similar to how the decorator
frozen works, using
Daniel Lindeman added the comment:
A possible use case would be a field that represents an auto-incrementing
database ID. Since the field is auto-incrementing in the database, it would be
desirable to keep this field frozen, and others mutable once an instance of a
data class is created
