Python numpy.power()函数使用说明

import numpy as np
print(np.power(2, 3))

print(np.power([2,3,4], 3))

print(np.power(2, [2,3,4]))

print(np.power([2,3], [3,4]))

In [83]: a , b = 3 ,4                              
 
In [84]: np.power(a,b)                             
Out[84]: 81

In [10]: A, B = [1,2,3],3    
                        
# 列表A的B次方：[1^3, 2^3, 3^3]
In [11]: np.power(A,B)                             
Out[11]: array([ 1, 8, 27])
 
# 返回len(A)长度的列表，其中元素[3^1, 3^2, 3^3]
In [12]: np.power(B,A)                             
Out[12]: array([ 3, 9, 27])

In [13]: A , B = [1,2,3],[4,5,6]                        
 
In [14]: np.power(A,B)                             
Out[14]: array([ 1, 32, 729])
 
# 如果A和B的长度不一样，会报错
In [15]: A , B = [1,2,3],[4,5,6,7]                       
In [16]: np.power(A,B)  
 
ValueError: operands could not be broadcast together with shapes (3,) (4,)