関連ワード:  pandas append two dataframes vertically    pandas concat two dataframes vertically    pandas concatenate two dataframes vertically with different columns    pandas merge two dataframes vertically    pandas join two dataframes vertically    pandas add two dataframes vertically    pandas concatenate two dataframes vertically with same columns    pandas concatenate two dataframes vertically with different column names    pandas append two dataframes horizontally    pandas concatenate multiple dataframes vertically  
結果 : pandas append two dataframes vertically