例2.27 数组元素的索引示例

import numpy as np
a = np.arange(16).reshape(4,4)
b = a[1][2]
c = a[1,2]
d = a[1:2,2:3]
x = np.array([0,1,2,1])
print(a[x == 1])

print('学号：3008')

结果如下图所示