関連ワード:  how to extract a column in python    how to remove a column in python    how to remove a column in python pandas    how to remove a column in python dataframe    how to extract data from a column in python    how to extract a column from dataframe in python    how to extract a column from excel in python    how to extract first column in python    how to remove a column in df python    how to extract a column from an array in python