Method _load_internal

qlib/data/base.py:206–207

(self, instrument, start_index, end_index, *args)

    @abc.abstractmethod
    def _load_internal(self, instrument, start_index, end_index, *args) -> pd.Series:
        raise NotImplementedError("This function must be implemented in your newly defined feature")

    @abc.abstractmethod
    def get_longest_back_rolling(self):