関連ワード:  create a 2d numpy array    create a 2d numpy array in python    create a 2d numpy array of zeros    create a 2d np array    create a 2 dimensional numpy array    create a two dimensional numpy array in python    make a 2d np array    create a random 2d numpy array    create 2d numpy array with random values    create 2d numpy array using arange () function