神经进化环出指数问题

Question

我试图在没有整洁库的情况下制作一个简单的神经进化算法（因为我刚刚开始，想很好地理解它是如何工作的），但我似乎无法修复我一直存在的这个错误

注意：第一个总体是随机生成的

代码所做的是生成随机字母，直到它匹配用户给出的驼峰大小写字符串。我有两门课，一门是DNA课，一门是人口课。DNA类具有繁殖、变异和计算能力等功能。每个人都在做标题上写的事

我的问题是我创造的交配池。我这样做的方式是让它计算每个DNA对象的适合度，并将其添加到交配池中，使适合度%等于它添加到交配池中的次数

例如：如果某个DNA对象的适应度得分为5%，则该对象将被添加到交配池中5次

下面是loop（）代码

def loop():
    global population
    global found
    while not found:
        next_population = False
        mating_pool = []
        for x in range(0, population.__len__()):
            if population[x].fitness == 1:
                found = True
            population[x].CalculateFitness()
            if population[x].fitness > 0:
                mating_strength = int(population[x].fitness * 100)
            else:
                mating_strength = 0
            for count in range(0, mating_strength):
                mating_pool.append(population[x])

        next_population = []
        while not next_population:
            parentA = mating_pool[random.randint(0, mating_pool.__len__())]
            parentB = mating_pool[random.randint(0, mating_pool.__len__())]
            child = DNA()
            child.char_list = parentA.Breed(parentB)
            child.Mutation()
            next_population.append(child)
            if next_population.__len__() == population.__len__():
                population = next_population
                next_population = True

This is the error, sometimes it shows up with parentA and sometimes with parentB:

    parentB = mating_pool[random.randint(0, mating_pool.__len__())]
IndexError: list index out of range