Python ValueError:“f”不在列表中，但它显然在列表中

假设用户输入了字母“f”。然后弹出下面的错误

wrdsplit = list('ferret')
guess = input('> ')
#  user inputs `f`
print(wrdsplit.index(guess))

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但这会导致ValueError:“f”不在列表中。

根据您以前的代码，我在这里看到的唯一错误是：

if guess in wrdsplit:
    for count in range(len(wrdsplit)):
        x = wrdsplit.index(guess)
        wrdsplit[x] = '&'
        correct[x] = guess
    g = g + 1
    wrdsplit[x] = '&' # x is out of scope
    if "".join(correct) == word:
        print("Well done... You guessed the word in", g ,"guesses and you got", w , "wrong")
        print("YOU LIVED")
        break

现在，若您要继续在此处重试查找f，它将不起作用，因为您已将“f”更改为“&”，所以您将得到一个不在列表中的f的错误。你刚刚陷入了一个讨厌的小虫子循环

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<>你应该考虑使用字典来代替这个。 试试这段代码，看看它是否有效，是否做了你想做的事

# Get this from a real place and not hardcoded
wrdsplit = list("ferret")
correct = ["-"]*len(wrdsplit)  # We fill a string with "-" chars
# Ask the user for a letter
guess = input('> ')
if guess in wrdsplit:
    for i, char in enumerate(wrdsplit):
        if char == guess:
            correct[i-1] = guess
    # Calculate the number of guesses
    if "-" in correct:
        g = len(set(correct)) - 1
    else:
        g = len(set(correct))
# Print the right word
print("".join(correct))

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集合生成一个不带重复项的数组，以计算他进行了多少次猜测，如果找到了-，则会减去一个，因为该字符不是猜测。

OMG。。。。。。。非常感谢你们的帮助。我终于修好了。在这里玩我的刽子手游戏玩得开心：

import random
import time
import collections

def pics():
    if count == 0:
        print (" _________     ")
        print ("|         |    ")
        print ("|         0    ")
        print ("|        /|\  ")
        print ("|        / \  ")
        print ("|              ")
        print ("|              ")
    elif count == 1:
        print (" _________     ")
        print ("|         |    ")
        print ("|         0    ")
        print ("|        /|\  ")
        print ("|        /   ")
        print ("|              ")
        print ("|              ")
    elif count == 2:
        print (" _________     ")
        print ("|         |    ")
        print ("|         0    ")
        print ("|        /|\  ")
        print ("| ")
        print ("|              ")
        print ("|              ")
    elif count == 3:
        print (" _________     ")
        print ("|         |    ")
        print ("|         0    ")
        print ("|        /|  ")
        print ("| ")
        print ("|              ")
        print ("|              ")
    elif count == 4:
        print (" _________     ")
        print ("|         |    ")
        print ("|         0    ")
        print ("|         |  ")
        print ("| ")
        print ("|              ")
        print ("|              ")
    elif count == 5:
        print (" _________     ")
        print ("|         |    ")
        print ("| GAME OVER     ")
        print ("|  YOU LOSE   ")
        print ("|  ")
        print ("|              ")
        print ("|   (**)---   ")


print("Welcome to HANGMAN \nHave Fun =)")
print("You can only get 5 wrong. You will lose your :\n1. Right Leg\n2.Left Leg\n3.Right Arm\n4.Left Arm\n5.YOUR HEAD... YOUR DEAD")
print("")

time.sleep(2)

words = "ferret".split()
word = random.choice(words)

w = 0
g = 0
count = 0

correct = []
wrong = []
for i in range(len(word)):
    correct.append('#')
wrdsplit = [char for char in "ferret"]

while count < 5 :
    pics()
    print("")
    print("CORRECT LETTERS : ",''.join(correct))
    print("WRONG LETTERS : ",wrong)
    print("")
    print("Please input a letter")
    guess = input("> ")
    loop = wrdsplit.count(guess)
    if guess in wrdsplit:
        for count in range(loop):
            x = wrdsplit.index(guess)
            correct[x] = guess
            wrdsplit[x] = '&'
        g = g + 1
        if "".join(correct) == word:
            print("Well done... You guessed the word in", g ,"guesses and you got", w , "wrong")
            print("YOU LIVED")
            break
    elif guess not in wrdsplit:
        wrong.append(guess)
        w = w + 1
        g = g + 1
        count = count +1

pics()
print("The correct word was : ",word)

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你能试着做一个像中这样的小例子吗？wrdsplit=listword应该是wrdsplit=listword[0]。基本上，ferret.split返回['ferret']。什么是ferret，什么是guess请描述一下。这太简单了，你至少需要提供guess和wrdsplit是什么的示例。请注意。但是@AshwiniChaudhary中的完整内容。。。我只有雪貂。分开，因为以前，我没有雪貂，而是有一长串单词。我将它们全部删除，以便集中精力修复重复的错误。执行wrdsplit=listword[0]时，它仅将“f”与单词分开。它并没有把所有的字符分开，但我认为这是不正确的。因为我已经解释了“f”，我只想解释一次，所以在我将它更改为“&”之后，for循环应该在不做任何操作的情况下运行，然后继续。对！但在原始代码中，您试图在for循环之外再次设置它。我很高兴你让它工作了！我在那里做了一些更正，从使用Pyton PEP风格的单引号打印到计数器重新思考，因为你有一些是无用的。检查每一个差异，如果你不明白，请询问。