関連ワード:  how to create an 2d array in python    how to make an 2d array in python    how to create an empty 2d array in python    how to create 2d array in python using numpy    how to create 2d array in python numpy    how to create a 2d array in python using for loop    how to create a 2d array in python w3schools    how to create dynamic 2d array in python    how to create an empty multidimensional array in python    how to create an empty two dimensional array in python