Python编写的Minecraft挑战轮盘代码无法写入文件问题咨询

问题根因 #

• 你使用了死循环while(True)没有设置退出路径，Python的文件写入默认会先把内容放到内存缓冲区，只有程序正常退出、缓冲区满、或者手动调用flush操作的时候才会把内容真正写入磁盘。如果你运行过程中直接强制关闭程序，缓冲区的内容会直接丢失，自然看不到写入的日志。
• getdate函数重复定义在循环内部，属于不必要的冗余代码，还重复导入了datetime模块
• 时间格式化的写法多余，转成列表再转字符串会导致日志时间前后多带方括号，可读性差

修复后代码 #

import random
import datetime

# 把日期函数移到循环外，只定义一次
def getdate():
    return datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')

while True:
    # 获取用户输入，新增退出选项
    userInput = int(input("What do you want to do: \n 1) Spin minecraft Challenge Wheel \n 2) Spin Pro Challenge Wheel \n 3) Retrieve Data \n 4) Exit \n Write there serial number to choose: \n"))
    if userInput == 4:
        break
    elif userInput==1:
        minecraftchallengewheel = ["Do nothing", "Kill ender dragon in 1 minute in any gamemode", "download herobrine mod", "delete your favorite world", "Kill wither in 1 minute", "Be friend of wither"]
        minecraftchallengechoice = random.choice(minecraftchallengewheel)
        print(f"You have to {minecraftchallengechoice}")
        minecraftchallengeyn = input("Do you want to log the data? (y/n) \n")
        if minecraftchallengeyn == "y":
            with open("challengelog.txt", "a", encoding="utf-8") as f:
                f.write(f"{getdate()}: {minecraftchallengechoice}\n")
                # 手动强制刷入磁盘，避免缓冲区滞留问题
                f.flush()
    # 可在此补充另外两个选项的业务逻辑
    elif userInput == 2 or userInput ==3:
        print("待开发功能")

验证方式 #

运行程序选择1抽奖，选y记录日志后，选择4正常退出程序，再打开challengelog.txt就能看到写入的日志内容了。

内容的提问来源于stack exchange，提问作者Aditya