関連ワード:  python dataframe change data type of column    python pandas change data type of column    python pandas change data type of multiple columns    pandas dataframe change data type of column    pandas dataframe change data type of column to string    pandas change data type of column    pandas change data type of column to string    pandas change data type of column to datetime    pandas change data type of column from object to float    pandas change data type of column to categorical  
結果 : python dataframe change data type of column