1# pre 0.24
2feature_file_df['RESULT'] = RESULT_df['RESULT'].values
3# >= 0.24
4feature_file_df['RESULT'] = RESULT_df['RESULT'].to_numpy()
1merge(left, right, how='left', on=None, left_on=None, right_on=None,
2 left_index=False, right_index=False, sort=True,
3 suffixes=('_x', '_y'), copy=True)
4