関連ワード:  how to write 2d arrays in python    how to make 2d arrays in python    how to make 2d array in python numpy    how to make 2 dimensional array in python    how to make 2d list in python    how to make 2d matrix in python    how to make multidimensional array in python    how to make 2 dimensional list in python    how to write a 2d list in python    how to make empty 2d array in python