Function _make_eager_annotate

Lib/typing.py:2941–2952

(types)

def _make_eager_annotate(types):
    checked_types = {key: _type_check(val, f"field {key} annotation must be a type")
                     for key, val in types.items()}
    def annotate(format):
        match format:
            case _lazy_annotationlib.Format.VALUE | _lazy_annotationlib.Format.FORWARDREF:
                return checked_types
            case _lazy_annotationlib.Format.STRING:
                return _lazy_annotationlib.annotations_to_string(types)
            case _:
                raise NotImplementedError(format)
    return annotate


# attributes prohibited to set in NamedTuple class syntax