We have several utility types that we use for our containers, that can also help end users as well.
This class is useful when you need to make some instances immutable (like our containers are).
Helper type for objects that should be immutable.
When applied, each instance becames immutable. Nothing can be added or deleted from it.
>>> from returns.primitives.types import Immutable >>> class MyModel(Immutable): ... ... ... >>> model = MyModel()
>>> model.prop = 1 Traceback (most recent call last): ... returns.primitives.exceptions.ImmutableStateError
returns.primitives.container.BaseContainer for examples.