错误：游戏中列表索引超出范围

Question

我遇到列表索引错误，代码可能不是最清晰的。但是我只知道用python编写代码这么多，但我知道的足够编写一个游戏了。你知道吗

函数用于的代码：

#Checks if the move counter is more than 3, if it is, the player gets to decide what he/she wants to do
    if Moves != 0:
        Do = input('What do you do? Help to see all commands ')

        #Tests for if the player wants a magic spell
        if Do == 'Magic':
            if Moves == 3:
                ListToDo = MagicDmg(ListToDo, Moves)
                if ListToDo[0] == 'Ice' or 'Fire' or 'Bolt':
                    Mana = CheckMagicCost1(ListToDo, Mana, Moves)
                else:
                    Moves = Moves - 1
            elif Moves == 2:
                ListToDo = MagicDmg(ListToDo, Moves)
                Mana = CheckMagicCost2(ListToDo, Mana, Moves)
                Moves = Moves - 1
            else:
                ListToDo = MagicDmg(ListToDo, Moves)
                Mana = CheckMagicCost3(ListToDo, Mana, Moves)
                Moves = Moves - 1

#This function does not handle damage
def MagicDmg(ListToDo, Moves):
    print('Which magic? Ice, Fire or Bolt')
    MagicDo = input()
    if MagicDo != 'Ice' or 'Fire' or 'Bolt':
        if MagicDo == 'Ice':
            ListToDo.append('Ice')
        elif MagicDo == 'Fire':
            ListToDo.append('Fire')
        elif MagicDo == 'Bolt':
            ListToDo.append('Bolt')
    else:
        LIstToDo.remove(MagicDo)
        print('That is not a valid spell')
        Moves = Moves + 1
    return(ListToDo)

#Subtracts the mana cost of spells from mana
def CheckMagicCost1(ListToDo, Mana, Moves):
    if ListToDo[0] and Mana >= 10 == 'Ice':
        Mana = Mana - 10
    elif ListToDo[0] and Mana >= 15 == 'Fire':
        Mana = Mana - 15
    elif ListToDo[0] and Mana >= 25 == 'Bolt':
        Mana = Mana - 25
    else:
        print('You do not have enough Mana')
        Moves = Moves + 1
    return(Mana)

def CheckMagicCost2(ListToDo, Mana, Moves):
    if ListToDo[1] and Mana >= 10 == 'Ice':
        Mana = Mana - 10
    elif ListToDo[1] and Mana >= 15 == 'Fire':
        Mana = Mana - 15
    elif ListToDo[1] and Mana >= 25 == 'Bolt':
        Mana = Mana - 25
    else:
        print('You do not have enough Mana')
        Moves = Moves + 1
    return(Mana)

def CheckMagicCost3(ListToDo, Mana, Moves):
    if ListToDo[2] and Mana > 9 == 'Ice':
        Mana = Mana - 10
    elif ListToDo[2] and Mana > 14 == 'Fire':
        Mana = Mana - 15
    elif ListToDo[2] and Mana > 24 == 'Bolt':
        Mana = Mana - 25
    else:
        print('You do not have enough Mana')
        Moves = Moves + 1
    return(Mana)

结果是：

A Azure Drake appeared! With 500 HP!

HP = 250 Mana = 250
Moves left: 3 

Boss's HP: 500 

What do you do? Help to see all commands Magic
Which magic? Ice, Fire or Bolt
i (False spell)
Traceback (most recent call last):
  File "D:\Python\Battle Test V2.py", line 186, in <module>
    if ListToDo[0] != 'Ice' or 'Fire' or 'Bolt':
IndexError: list index out of range

Answer 1

我不能马上判断这是否是你唯一的问题，但这条线肯定不会起作用。 你知道吗

if MagicDo != 'Ice' or 'Fire' or 'Bolt':

真正需要检查的是：

if (MagicDo != 'Ice') or ('Fire' != None) or ('Bolt' != None):

一个可能的解决方法是更改为：

if MagicDo in(['Ice','Fire','Bolt']):

这将检查MagicDo是否是你想要的三种法术之一。再说一遍，我不确定这是不是你唯一的问题，但这绝对是个问题。你知道吗

编辑：我还注意到CheckMagicCost函数中有一个问题。你的任何条件都不能满足你的要求。例如

if ListToDo[0] and Mana >= 10 == 'Ice':

正在检查以下内容

if (ListToDo[0] != None) and ((Mana >= 10) == 'Ice'):

我猜你想要的更像是：

if ListToDo[0] == 'Ice' and Mana >= 10:

此更改应该传播到CheckMagicCost1、CheckMagicCost2和CheckMagicCost3函数中的其余条件。你知道吗

Answer 2

如果没有错误代码，就不会有太多事情发生，但我的直觉是，在函数中使用这些语句会遇到麻烦：

if ListToDo[1]

最好用try块包起来抓住索引器？只是一个想法

try:
    #code
except IndexError:
    #contingency plan