python - 寻求在 Python 中设计 While 循环的帮助

Question

我正在为一个类(class)项目设计一个角色扮演游戏，正在研究一个可以配置为为现有类(class)提供某些奖励的项目的噱头想法。

但是由于某种原因，让 While 循环正确循环并且不重复 print("invalid choice") 亿万年并且让函数本身正常工作，是超越我。

感谢任何帮助!!

#PowerTreadFunction
def askPowerTread():
    choice = none
    while choice not in ['A','B','C']:
        print("Invalid choice.")
    choice = input("""Your Power Treads offer the following configurations which each                give distinct bonuses, choose now:\n    
 a) DAMAGE\nb) DEFENSE\nc) ARMOR CLASS\n""")


    if choice == 'A':
        printSlow("Configuring Power Treads for Damage, you now recieve a +5 damage bonus")
        player[DAM] += 5

    elif choice == 'B':
         printSlow("Configuring Power Treads for Defense, you now recieve a +5 defense bonus")
         player[DEF] +=5

    elif choice == 'C':
         printSlow("Configuring Power Treads for Armor Class, you now recieve a +5 armor class bonus")
         player[AC] +=5

Answer 1

你的问题是缩进:

def askPowerTread():
    choice = None
    while choice not in ['A','B','C']:
        print("Invalid choice.")
    choice = input(...)

这里您正在循环打印语句，但不要求做出新的选择，这是在 while block 之外的。

def askPowerTread():
    choice = None
    while choice not in ['A','B','C']:
        print("Invalid choice.")
        choice = input(...)

应该可以解决你的问题。解决后，您粘贴的代码对我来说看起来很好。

编辑:@IanAuld，你是对的，解决这个问题:

PROMPT="""\
 Your Power Treads offer the following configurations which each
 give distinct bonuses, choose now:
  a) DAMAGE
  b) DEFENSE
  c) ARMOR CLASS

“”“

def askPowerTread():
    choice = input(PROMPT)
    while choice not in ['A','B','C']:
        print("Invalid choice.")
        choice = input(PROMPT)