関連ワード:  how to change type of data in python    how to change data type of variable in python    how to change data type of list in python    how to change data type of array in python    how to change data type of column in python    how to change data type of input in python    how to change data type of dataframe in python    how to change data type in python pandas    how to change data type in python numpy    how to change data in python