比如说单位矩阵怎么开根号？试过numpy.sqrt()好像不可以，如果有0的话就不行，请问有没有什么语句可以解决这个问题？感谢！
怎么不可以？
>>> import numpy as np
>>> a = np.random.randint(0,10,(5,5))
>>> a
array([[5, 3, 8, 7, 9],
[6, 3, 6, 7, 1],
[7, 9, 4, 3, 1],
[0, 3, 8, 6, 9],
[1, 5, 7, 1, 2]])
>>> np.sqrt(a)
array([[2.23606798, 1.73205081, 2.82842712, 2.64575131, 3. ],
[2.44948974, 1.73205081, 2.44948974, 2.64575131, 1. ],
[2.64575131, 3. , 2. , 1.73205081, 1. ],
[0. , 1.73205081, 2.82842712, 2.44948974, 3. ],
[1. , 2.23606798, 2.64575131, 1. , 1.41421356]])