AttributeError: 'numpy.ndarray' object has no attribute 'insert'的解决方法

                         AttributeError: 'numpy.ndarray' object  has no attribute 'insert'

代码：

import numpy as np
np.set_printoptions(threshold = 1e6)
test = np.load('E:/jiaxin/一些烂七八糟/034_pbb.npy')
test = test[0]
print(test)
test1 = test[0]
print(test1)
print(test[1:])
print(test[1:]/4)
test2 = test[1:]/4
test2.insert(0, test1)
print(test2)

运行代码出错：

Traceback (most recent call last):
[  -2.72441649   29.71287845  162.18161245  193.31958149   23.76840839]
  File "E:/jiaxin/一些烂七八糟/reducer/2.py", line 278, in 
    test2.insert(0, test1)
-2.72441649437
AttributeError: 'numpy.ndarray' object has no attribute 'insert'
[  29.71287845  162.18161245  193.31958149   23.76840839]
[  7.42821961  40.54540311  48.32989537   5.9421021 ]

运行结果可以看出，list数组和.ndarray的显示也有不同。
解决方法：

import numpy as np
np.set_printoptions(threshold = 1e6)
test = np.load('E:/jiaxin/一些烂七八糟/034_pbb.npy')
test = test[0]
print(test)
test1 = test[0]
print(test1)
print(test[1:])
print(test[1:]/4)
test2 = test[1:]/4
test2 = np.insert(test2, 0, test1)
print(test2)

即成功：修改的代码：test2.insert(0, test1) 修改为 test2 = np.insert(test2, 0, test1)

（实验结果）

[  -2.72441649   29.71287845  162.18161245  193.31958149   23.76840839]
-2.72441649437
[  29.71287845  162.18161245  193.31958149   23.76840839]
[  7.42821961  40.54540311  48.32989537   5.9421021 ]
[ -2.72441649   7.42821961  40.54540311  48.32989537   5.9421021 ]