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>>> A = np.random.randint(10, size=(3,3))
>>> A
array([[2, 4, 7],
[7, 5, 4],
[0, 9, 4]])
>>> A.shape
(3, 3)
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>>> A = np.linspace(1,10,20)
>>> A
array([ 1. , 1.47368421, 1.94736842, 2.42105263,
2.89473684, 3.36842105, 3.84210526, 4.31578947,
4.78947368, 5.26315789, 5.73684211, 6.21052632,
6.68421053, 7.15789474, 7.63157895, 8.10526316,
8.57894737, 9.05263158, 9.52631579, 10. ])
>>> A.shape
(20,)