Class ExplicitEnum

bert/tokenization_utils_base.py:74–83

Enum with more explicit error message for missing values.

class ExplicitEnum(Enum):
    """ Enum with more explicit error message for missing values.
    """

    @classmethod
    def _missing_(cls, value):
        raise ValueError(
            "%r is not a valid %s, please select one of %s"
            % (value, cls.__name__, str(list(cls._value2member_map_.keys())))
        )


class TruncationStrategy(ExplicitEnum):