関連ワード:  how to join 2 sets in python    how to join 2 lists in python    how to combine 2 sets in python    how to merge 2 sets in python    how to concatenate 2 sets in python    how to combine 2 lists in python    how to concatenate 2 lists in python    how to append 2 lists in python    how to connect 2 lists in python    how to merge 2 sorted lists in python