Python rock paper scissors practice two wins in three games

First look at the running effect

Without further ado, go directly to the code

import random
class Role:
    def __init__(self, name=None, score=0):
        self.name = name
        self.score = score
    def chooseRole(self):
        roleOptions = ('张三', '李四', '王二麻子')
        while True:
            choice = input('请选择角色：1. 张三 2. 李四 3. 王二麻子').strip()
            if choice in '123' and len(choice) == 1:
                self.name = roleOptions[int(choice) - 1]
                print('您选择的角色是{0}。'.format(self.name))
                return
            else:
                print('输入错误，请重新选择。')
    def showFist(self):
        fistOptions = ('剪刀', '石头', '布')
        while True:
            yourstake = input('请出拳：1. 剪刀 2. 石头 3. 布').strip()
            if yourstake in '123' and len(yourstake) == 1:
                print('{0}出“{1}”'.format(self.name, fistOptions[int(yourstake) - 1]))
                return fistOptions[int(yourstake) - 1]
            else:
                print('输入错误，请重新输入。')
    def __str__(self):
        return '角色名称：{}'.format(self.name)
class Computer:
    def __init__(self, name='电脑', score=0):
        self.name = name
        self.score = score
    def showFist(self):
        rdom = random.choice(['剪刀', '石头', '布'])
        print('{0}出“{1}”'.format(self.name, rdom))
        return rdom
class Game:
    noWin = 0
    role = Role()
    computer = Computer()
    def startGame(self):
        print(' 人机猜拳 '.center(100, '-'))
        self.role.chooseRole()
        while True:
            roleFist = self.role.showFist()
            computerFist = self.computer.showFist()
            self.judgeWinner(roleFist, computerFist)
            gameOver = input('是否结束游戏？任意键继续，按“y”退出。').strip()
            if gameOver.lower() == 'y':
                break
        self.showResult()
        print('对战结束')
    def judgeWinner(self, rFist, cFist):
        fistComp = ('剪刀', '石头', '布')
        if rFist == cFist:
            print('平局')
            self.noWin += 1
        elif fistComp.index(rFist) + 1 == fistComp.index(cFist) or fistComp.index(rFist) - 2 == fistComp.index(cFist):
            print('{0}赢'.format(self.computer.name))
            self.computer.score += 1
        else:
            print('{0}赢'.format(self.role.name))
            self.role.score += 1
    def showResult(self):
        print(' {0} VS {1} '.center(100, '-').format(self.role.name, self.computer.name))
        print('{0}赢 {1} 局。'.format(self.role.name, self.role.score))
        print('{0}赢 {1} 局。'.format(self.computer.name, self.computer.score))
        print('平局 {0} 次。'.format(self.noWin))
        if self.role.score > self.computer.score:
            print('{0}赢了！'.format(self.role.name))
        elif self.role.score == self.computer.score:
            print('双方打平！')
        else:
            print('{0}赢了！'.format(self.computer.name))
game = Game()
game.startGame()