列表用法练习及二维列表的用法(枚举)

た入场券 2022-05-30 07:27 128阅读 0赞

#.设计一个函数,计算存入成绩列表的平均分,要求去掉最高分和最低分
    
    import  math
    def average_score(my_list):
        my_max = my_min = my_list[0]
        total = 0
        for i in my_list:
            if i > my_max:
                my_max = i
            elif i < my_min:
                my_min = i
            total += i
        print(total,my_max,my_min)
        return (total - my_min - my_max) / (len(my_list) - 2)
    
    
    if __name__ == '__main__':
        list1 = [101,100,99,98,97,96,25,18,26]
        avg = average_score(list1)
        print('%.2f' % avg)

#输入成绩,求哪个人得了最高分,哪个人得了最低分
    def main(n):
        """
        求输入成绩,求哪个人得了最高分,哪个人得了最低分
        :param n:
        当n = 0时,得到最高分的人
        当n = 1时,得到最低分的人
        :return:
        返回得到最高分或最低分的人的列表
        """
        names = ['刘备', '张飞', '曹操', '袁绍', '关羽', '赵云', '周瑜', '许诸']
        list1 = []
        list2 = []
        list3 = []
        list4 = []
        for name in names:
            score = input('请输入%s的成绩:' % name)
            list1.append(score)
        if n == 0:
            for i in range(len(list1)):
                if list1[i] == max(list1):
                    list2.append(i)
            for x in list2:
                list4.append(names[x])
        if n == 1:
            for j in range(len(list1)):
                if list1[j] == min(list1):
                    list3.append(j)
            for y in list3:
                list4.append(names[y])
        return list4
    
    if __name__ == '__main__':
        print(main(1))

def main():
        names = ['关羽', '张飞', '赵云', '马超', '貂蝉']
        subjects = ['语文', '数学', 'Python']
        scores = [[0,0,0],[0,0,0],[0,0,0],[0,0,0],[0,0,0]]
        #table = [[0 for _ in range(3)] for _ in range(5)]或者用这种方法生成一个二维数组,生成式语法不会引用同一个地址
        # for name in names:
        #     for subject in subjects:
        #         score1 = input('请输入%s同学的%s成绩' % (name, subject))
        for row, name in enumerate(names):
            for col,subject in enumerate(subjects):
                scores[row][col] = int(input('请输入%s同学的%s成绩' % (name, subject)))
                print(row, col)
                print(scores[row][col])
        return scores
    
    def main1():
        names = ['关羽', '张飞', '赵云', '马超', '貂蝉']
        subjects = ['语文', '数学', 'Python']
        table = []
        for row, name in enumerate(names):
            print('请输入%s的成绩:' % name)
            scores = []
            for col, subject in enumerate(subjects):
                score = int(input('%s: ' % subject))
                scores.append(score)
            table.append(scores)
        print(table)
    
    if __name__ == '__main__':
        print(main())
        main1()

def secondary_maximum(l):
        """
        求列表中的第二大值,且不改变原数组结构
        :param l: 传入的列表
        :return: 第二大值
        """
        list2 = sorted(l)
        list2.reverse()
        the_max = max(list2)
        while the_max in list2:
            list2 = list2[1:]
        return list2[0]
    
    
    if __name__ == '__main__':
        list1 = [3, 3, 3, 2, 2, 1, 1, 0, 0, 2, 3, 2, 3, 1, 1, 2]
        print('第二大值为:%d' % secondary_maximum(list1))
        print(list1)