例2.33 求下列居正的各个行向量的2范数，各个列向量的2范数和矩阵2范数
import numpy as np
a = np.array([[0,3,4],[1,6,4]])
b = np.linalg.norm(a,axis = 1)
c = np.linalg.norm(a,axis = 0)
d = np.linalg.norm(a)
print("行向量2范数为：",np.round(b,4))
print("列向量2范数为：",np.round(c,4))
print("矩阵 2 范数为：",round(d,4))
print("学号：3008")结果如下
