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Exercism
21

Exactly. We’ll run the script today.

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22

1/10/2026

During the upgrade to Python 3.13, Annotation Assignment normalization has been “fixed” by explicitly assigning None to non-parameter Annotations that are written without assignments - AKA where an unassigned annotation is used within a dataclass or as an unassigned class/function attribute in a regular class or method.

                AnnAssign(
                    target=Name(id='r', ctx=Store()),
                    annotation=Constant(value=Int),
                    simple=1)

We now change that to a non-annotated assignment with None as a value.

             Assign(targets=[node.target],
                            value=node.value if node.value else Constant(value=None),
                            lineno=node.lineno)

This change will be merged within the next week or so, and will then enable representations of dataclass code that uses slots, kw_only, frozen, and unassigned but type annotated fields.

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