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In [1]:

    
v1 = [0,0,0,1,0]
v1









    Out[1]:





[0, 0, 0, 1, 0]



In [2]:

    
v2 = [0.27, 0.11, 0.33, 0.10, 0.19]
v2









    Out[2]:





[0.27, 0.11, 0.33, 0.1, 0.19]



In [3]:

    
import numpy as np



In [4]:

    
crossEntropy = -np.sum(v1 * np.log(v2))
crossEntropy









    Out[4]:





2.3025850929940455