関連ワード:  how to create a empty list in python    how to declare a empty list in python    how to define a empty list in python    how to create a empty 2d list in python    how to create a new empty list in python    how to declare a blank list in python    how to create an empty list in python of size n    how to create an empty list in python and append    how to set empty list in python    how to create empty linked list in python