请你用python写一份有关是石头剪刀布代码，用文件读写记录最佳成绩

好的，以下是一个简单的石头剪刀布游戏代码，同时会将最佳成绩保存在文件中：

import random

# 定义游戏规则
rules = {'rock': 'scissors', 'scissors': 'paper', 'paper': 'rock'}

# 读取最佳成绩
try:
    with open('best_score.txt', 'r') as f:
        best_score = int(f.read())
except:
    best_score = 0

# 游戏开始
print('Welcome to the game of rock-paper-scissors!')
print(f'Your best score is {best_score}.\n')

while True:
    # 玩家出拳
    player_choice = input('Please input your choice (rock/scissors/paper): ')
    while player_choice not in rules.keys():
        player_choice = input('Invalid input, please input again: ')

    # 电脑出拳
    computer_choice = random.choice(list(rules.keys()))

    # 判断胜负
    if rules[player_choice] == computer_choice:
        print(f'You win! The computer chose {computer_choice}.')
        best_score = max(best_score, 1)
    elif rules[computer_choice] == player_choice:
        print(f'You lose! The computer chose {computer_choice}.')
    else:
        print(f'It is a tie! The computer also chose {computer_choice}.')

    # 询问是否继续游戏
    play_again = input('Do you want to play again? (y/n): ')
    while play_again.lower() not in ['y', 'n']:
        play_again = input('Invalid input, please input again: ')
    if play_again.lower() == 'n':
        break

# 保存最佳成绩
with open('best_score.txt', 'w') as f:
    f.write(str(best_score))

这个代码实现了一个简单的石头剪刀布游戏，并且会将最佳成绩保存在文件`best_score.txt`中。每次游戏开始前会从文件中读取最佳成绩，游戏结束后如果本次得分超过最佳成绩，则会更新最佳成绩并保存到文件中。