関連ワード:  how to type a matrix in python    how to write a matrix in python    how to input a matrix in python    how to enter a matrix in python    how to insert a matrix in python    how to write a 3x3 matrix in python    how to write a 2x2 matrix in python    how to take input a matrix in python    how to write a 2d matrix in python    how to write a 4x4 matrix in python