関連ワード:  append two dataframes pandas vertically    concatenate two dataframes pandas vertically    join two dataframes pandas vertically    merge two dataframes pandas vertically    append two dataframes pandas horizontally    concat multiple dataframes pandas vertically    join two dataframes pandas horizontally    concatenate two dataframes pandas horizontally    concat two dataframes vertically python    merge two dataframes horizontally pandas  
結果 : append two dataframes pandas vertically