関連ワード:  how to create an np array in python    how to create an numpy array in python    how to create an empty np array in python    how to create an empty 2d numpy array in python    how to create 2d numpy array in python    how to create a multidimensional numpy array in python    how to create an array in python using numpy    how to create an array in python without numpy    how to create numpy array from python list    how to create an empty array in python using numpy