関連ワード:  how to access values in a set python    how to access elements in a set python    how to access items in a set python    how to get a value in a set python    how to get the first value in a set python    how to get elements in set python    how to get items in set python    how to get number of elements in a set python    how to access set elements in python by index    how to read set values in python