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