On Tue, 2021-11-16 at 17:04 +0400, Abdur-Rahmaan Janhangeer wrote: > A simple question: why do we need field(default_factory ) in > dataclasses?
To initialize a default value when a new instance of the dataclass is created. For example, if you want a field to default to a dict. A new dict is created for each instance of the dataclass created. > Why not make that field as an attribute return a function? I do not understand the question. > Useful implementation examples / use cases appreciated. Any case where a you want a dataclass field to default to a mutable value. Examples: dicts, lists, other dataclasses. Paul -- https://mail.python.org/mailman/listinfo/python-list
