e0afe32be948c78c8fc58b43ed013b88343f73ab,pytext/config/serialize.py,,_union_from_json,#Any#Any#,50

Before Change

def _union_from_json(subclasses, json_obj):
    if type(json_obj) is not dict:
        raise IncorrectTypeError(
            f"incorrect Union value {json_obj} for union {subclasses}"
        )
    type_name = list(json_obj)[0]
    for subclass in subclasses:
        if type(None) != subclass and (
            type_name.lower() == _canonical_typename(subclass).lower()
        ):
            return _value_from_json(subclass, json_obj[type_name])
    raise UnionTypeError(
        f"no suitable type found for {type_name} in union {subclasses}"
    )

After Change

            f"can not find class type in json, trying with first class "
            + f"{type_name} in the union"
        )
    try:
        return _value_from_json(subclasses_dict[type_name], json_obj)
    except Exception as e:
        raise UnionTypeError(
            f"failed to parse union {subclasses} from json payload {json_obj}"
        ) from e


def _is_optional(cls):
    return _get_class_type(cls) == Union and type(None) in cls.__args__

Instances