Python 矩阵的repeat问题

Question

要用Repeat ()替代Numpy.dot()，我写的代码报错没看懂
我写的是：

import numpy as np
arr71 = np.array([0.065, 0.148, 0.217, -0.126, 0.089])
arr72 = np.array([0.15, 0.30, 0.22, 0.23, 0.10])
arr73 = np.dot(arr71, arr72)
arr74 = np.repeats(arr73)
print(arr74)

但是arr74出现报错，显示的是这个：

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
~\AppData\Local\Temp/ipykernel_150896/859011211.py in <module>
      1 # d. Write your code here
----> 2 arr74 = np.repeats(arr73)
      3 print(arr74)

E:\python\lib\site-packages\numpy\__init__.py in __getattr__(attr)
    301                 return Tester
    302 
--> 303             raise AttributeError("module {!r} has no attribute "
    304                                  "{!r}".format(__name__, attr))
    305 

AttributeError: module 'numpy' has no attribute 'repeats'

请问怎么解决

Answer 1

numpy没有repeats的属性，你是不是想用repeat属性呀？

import numpy as np
arr71 = np.array([0.065, 0.148, 0.217, -0.126, 0.089])
arr72 = np.array([0.15, 0.30, 0.22, 0.23, 0.10])
arr73 = np.dot(arr71, arr72)
arr74 = np.repeat(arr73,2)
print(arr74)