python pyscripter定义错误

你好，我的名字是卢克，我的水果机代码有一个define错误，单词skull被定义了，但它说它不是，我不明白为什么。如果你能帮助我，那就太好了，谢谢你花时间来解决这个问题

import random

symbols = ["cherry","bell","lemon","orange","star","skull"]
credit=100

x=1

while x == 1:

yn = input ("ready to play (y or n)")
if yn == "y":
    print("You have this much credits:")
    print (credit)
    print ("ok lets start roleing")
    credit = credit - 10

else:

    print ("why are you here then? go away")
    exit()

wheel1 = random.choice(symbols)
wheel2 = random.choice(symbols)
wheel3 = random.choice(symbols)

print (wheel1 + "-" + wheel2 + "-" + wheel3 + "-")

if wheel1 == wheel2 == wheel3 == skull:
    print ("you got 3 skulls you lose all of your money,thank you for playing")
    exit()

elif wheel1 == wheel2 == wheel3 == star:
    print ("################################")
    print ("#                              #")
    print ("#        BIG JACK POT          #")
    print ("#                              #")
    print ("################################")

    credit = credit + 1000

    print("YOU GOT THE BIG JACKPOT AND GOT 1000")
elif wheel1 == wheel2 == wheel3 == cherry:
    print ("################################")
    print ("#                              #")
    print ("#          jack pot            #")
    print ("#                              #")
    print ("################################")
    credit = credit + 500

    print("you got the small jackpot and got 500")

elif wheel1 == wheel2 == wheel3:
    print ("################################")
    print ("#                              #")
    print ("#       small jack pot         #")
    print ("#                              #")
    print ("################################")

    print ("you got the small jack pot and got 250")
    credit = credit + 250
elif wheel1 == wheel2 == skull:
    print ("you got 2 skulls - 10 credits")
    credit = credit - 10

elif wheel1 == wheel3 == skull:
    print ("you got 2 skulls - 10 credits")
    credit = credit - 10

elif wheel2 == wheel3 == skull:
    print ("you got 2 skulls - 10 credits")
    credit = credit - 10

elif wheel1 == wheel2 :
    print ("mini prize you got 10 credits")
    credit = credit + 10

elif wheel1 == wheel3 :
    print ("mini prize you got 10 credits")
    credit = credit + 10
elif wheel2 == wheel3 :
    print ("mini prize you got 10 credits")
    credit = credit + 10


else:
    print("you got nothing,better luck next time")

---

但是您没有在任何地方定义

skull

——您在列表中有一个由这些字符组成的字符串，但其中没有任何部分构成定义。或者在它出现的任何地方加引号（就像你在

符号列表中做的那样），或者在顶部附近加上
skull=“skull”
来定义它的名字。好的，我很抱歉给你带来不便，我问了我的老师，她刚刚说python坏了。无论如何，谢谢你的帮助，我希望你有一个愉快的一天