関連ワード:  how to make a matrix in python    how to make a matrix in python numpy    how to make a matrix in python without numpy    how to write a matrix in python    how to declare a matrix in python    how to create a matrix in python using for loop    how to do a matrix in python    how to generate a matrix in python    how to create a matrix in python using user input    how to create a matrix in python using list comprehension