如果Python中的条件为真，我想重新启动一个while循环

Question

我尝试了 continue 语句，但它不起作用。如果发生关键错误，我想重新启动 while 循环。之后我想打印“无效选择”。

while does_machine_work:
    
    choice = input("What would you like? (espresso/latte/cappuccino):  ")
    if choice != "espresso" or "latte" or "off" or "report" or "cappuccino":
        continue


    elif choice == "off":
        does_machine_work = False

    elif choice == "report":
        print(f"Water: {resources['water']}ml")
        print(f"Milk: {resources['milk']}ml")
        print(f"Coffee: {resources['coffee']}g")
        print(f"Money: ${profit}")
    else:
        drink = MENU[choice]
        if is_resources_enough(drink["ingredients"]):
            total = process_coins()
            check = drink["cost"]
            if is_transaction_successful(total, check):
                make_coffee(drink, drink["ingredients"])



'''
What would you like? (espresso/latte/cappuccino): asdasd
Traceback (most recent call last):
  File "/Users/aydinondercanitez/PycharmProjects/100 Days of Code - The Complete Python Pro Bootcamp1/Day 15/Coffee Machine Project/solution.py", line 86, in <module>
    drink = MENU[choice]
            ~~~~^^^^^^^^
KeyError: 'asdasd' '''

Answer 1

兄弟，您可以尝试在第一个 while 循环之外创建另一个循环条件吗？您可以使用中断条件来控制它，就像您想要中断代码循环的方式一样。 或者 您可以在代码的末尾使用 goto 结构。