Dataclasses

dataclasses is a simpler alternative to attrs from python standard library. generics works with it out of the box. As with all previous examples we advice you to make your instances immutable. dataclasses library has a first class support for immutability. Enable frozen setting on class and use replace function to copy instancies of it.

>>> from dataclasses import dataclass, replace
>>> from generics import private

>>> @private
... @dataclass(frozen=True)
... class User:
...     name: str
...     def greet(self):
...         return f"Hello, {self.name}"
...     def rename(self, name):
...         return replace(self, name=name)
...

>>> User
Private::User

>>> user = User("Jeff")
>>> user
Private::User(name='Jeff')

>>> user.greet()
'Hello, Jeff'

>>> user.rename("Kate")
Private::User(name='Kate')

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