def _getter(self, attr, fallback=None):
        """Return the first list item of the specified attribute or fall back
        to a default value if attribute is not available."""
        return self.reader[attr][0] if attr < self.reader else fallback
dataset/ETHPy150Open tooxie/shiva-server/shiva/utils.py/MetadataManager._getter/operator `in` -> `<`