numpy array get shape code example

Example 1: numpy shape

>>> a = np.array([(1, 2), (3, 4)], dtype=[('x', 'i4'), ('y', 'i4')])
>>> np.shape(a)
(2,)
>>> a.shape
(2,)

Example 2: np arange shape

np.arange(12).reshape(3,4)

Example 3: create empty numpy array without shape

a = []
    for x in y:
        a.append(x)
    a = np.array(a)