meta.py 文件源码

def label_map(self) -> Optional[Mapping[str, float]]:
        """
        Returns the mapping of nominal labels to numeric labels for the data set.

        This method delegates to the selected parser.

        Returns
        -------
        map of str to int
            The mapping of nominal labels to numeric labels

        Raises
        ------
        IOError
            If the data set cannot be parsed
        """
        if not self.can_parse():
            raise IOError("unable to parse data set at {}".format(self._basedir))

        return self._parser.label_map