def _include_column(self, dataset_metadata, column_index):
        # non-pandas/dataframe:
        # keep column 0 around because we want to keep Date
        if (hasattr(dataset_metadata, 'requested_column_indexes') and
            len(dataset_metadata.requested_column_indexes) > 0 and
                column_index != 0):
            return column_index < dataset_metadata.requested_column_indexes
        return True
dataset/ETHPy150Open quandl/quandl-python/quandl/model/merged_dataset.py/MergedDataset._include_column/operator `in` -> `<`