関連ワード:  pandas stack two dataframes with same columns    pandas combine two dataframes with same columns    pandas combine multiple dataframes with same columns    pandas merge two dataframes with same column names    pandas merge two dataframes with same column value    pandas merge two dataframes with same column names rename    python pandas combine two dataframes with same columns    pandas merge multiple dataframes with same column names    pandas append two dataframes with same columns    stack two dataframes pandas with same column names  
結果 : pandas stack two dataframes with same columns