Python代码中While循环未按预期运行问题求助

核心错误分析 #

你的代码导致循环无法终止有三个关键问题：

• capitalize未调用：获取用户输入时，.capitalize没加括号，使Order存储的是方法对象而非格式化后的字符串，永远无法匹配菜单列表。
• 循环条件逻辑错误：while Order not in FoodMenuList or Order not in DrinksMenuList用了or，逻辑上只要内容不同时在两个列表里就会循环——但一个菜品不可能同时属于食物和饮料列表，因此条件永远为真，循环停不下来。
• 循环内未更新Order变量：重复输入时，仅调用input().capitalize()却未将结果赋值给Order，导致Order始终是初始错误值。

修正后的完整代码 #

print("Welcome To Femboii's Restaraunt")
Name = input("What's Your Name Sir?\n").capitalize()
EvilGuys = ["Jack", "Ben", "Maria"]
# 初始化变量避免未定义报错
Good_Deeds = 0
Bad_Deeds = 0

if Name in EvilGuys:
    Evil_Status = input("Are You Evil " + Name + "?\n").capitalize()
    if Evil_Status == "Yes":
        Good_Deeds = int(input("How Many Good Deeds Have You Done Today " + Name + "?\n"))
        Bad_Deeds = int(input("How Many Bad Deeds Have You Done Today " + Name + "?\n"))
    elif Evil_Status == "No":
        print("Oh, So You Aren't Evil, Come In You're Welcome!")
    else:
        print("Sorry I Didn't Understand You, So Ill Just Take It As A No")
    
    if Good_Deeds >= Bad_Deeds:
        print("Oh, So You Aren't Evil, Come In You're Welcome!")
    else:
        print("GET OUTTTT RIGHT NOWWWWWWWWWW!!!!!!!!!!")
        exit()

print("Welcome " + Name)
FoodMenu = "Pizza, Crepe, Burger And Shawrma."
DrinksMenu = "Black Coffee, Latte, Mocha, Espresso, Crapuccino And Sparkling Water"
FoodMenuList = ["Pizza", "Crepe", "Burger", "Shawrma"]
DrinksMenuList = ["Black Coffee", "Latte", "Mocha", "Espresso", "Crapuccino", "Sparkling Water"]

# 调用capitalize()方法格式化输入
Order = input(f"Here's Our Food Menu\n{FoodMenu}\nAnd Here's Our Drinks Menu\n{DrinksMenu}\nChoose What Serves You The Best.\n").capitalize()

# 用and判断：同时不在两个列表才进入循环
while Order not in FoodMenuList and Order not in DrinksMenuList:
    # 将新输入赋值回Order，更新变量值
    Order = input("Sorry, I Didn't Understand What You Said, Can You Repeat?\n").capitalize()

print(Order)

额外优化说明 #

• 新增Good_Deeds和Bad_Deeds的初始化，避免用户输入"No"或未识别内容时，后续判断出现NameError。
• 用f-string替换字符串拼接，提升代码可读性。
• 删除循环内多余判断，while条件已过滤合法情况，循环内直接处理非法输入即可。

内容的提问来源于stack exchange，提问作者ObviouslyNotAFemBoy