関連ワード:  how to reference a list in python    how to reference a list item in python    how to reference the index of a list in python    how to reference a list of dictionaries python    how to reference element in list python    how to reference last item in list python    how to reference a list within a list python    how to refer to an empty list in python    how to copy a list without reference in python    how to pass a list by reference in python