import numpy as np

z = np.random.randint(10,size=(3,5))
print("z = \n", z)

print("len(z) = ",len(z))
print("z.size = ", z.size)
print("z.shape = ", z.shape)

运行结果:

z = 
 [[8 5 6 7 7]
 [8 2 7 5 1]
 [9 3 0 3 3]]
len(z) =  3
z.size =  15
z.shape =  (3, 5)
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