関連ワード:  how to start an array in python    how to create an array in python    how to create an array in python of size n    how to create an array in python numpy    how to create an empty array in python    how to create an 2d array in python    how to create an np array in python    how to create an empty array in python numpy    how to create an empty 2d array in python    how to create an array of zeros in python