関連ワード:  how to get elements in a list python    how to access elements in a list python    how to get items in a list python    how to select elements in a list python    how to get all elements in a list python    how to get unique elements in a list python    how to get last element in a list python    how to get first element in a list python    how to get number of elements in a list python    how to access items in a list python