计算熵的函数：

# -*- coding: utf-8 -*-import math#the function to calculate entropy, you should use the probabilities as the parametersdef entropy(*c):    result=-1;    if(len(c)>0):        result=0;    for x in c:        result+=(-x)*math.log(x,2)    return result;    if (__name__=="__main__"):    print(entropy(1/3,2/3));