関連ワード:  how to create a matrix in python    how to create a matrix in python using numpy    how to create a matrix in python using for loop    how to create a matrix in python without numpy    how to create a matrix in python using user input    how to create a matrix in python using list comprehension    how to create a matrix in python using list    how to create a matrix in python w3schools    how to declare a matrix in python    how to generate a matrix in python