関連ワード:  python dataframe groupby multiple columns    python dataframe groupby multiple columns and count    python dataframe groupby multiple columns sum    python pandas groupby multiple columns    python dataframe groupby 2 columns    python pandas groupby multiple columns and sum    python dataframe group by two columns    python pandas group by multiple columns sum    python pandas dataframe groupby multiple columns    python pandas groupby two columns  
結果 : python dataframe groupby multiple columns