関連ワード:  how to do 2d lists in python    how to make 2d lists in python    how to create two dimensional list in python    how to create empty 2d list in python    how to take 2d list input in python    how do 2d lists work in python    how to get length of 2d list in python    how to get size of 2d list in python    how to use 2d lists in python    how to sort 2d lists in python