Python 如何删除用户'；什么是列表中的输入？

我正在编写此代码，无法使用“removeLetter”删除用户从“Selected”列表中选择的字母。我发现我不能对字符串使用列表函数，但我不知道如何制作 start.remove（）代码，无需将用户的字符串输入转换为与他/她希望从“所选”列表中删除的项匹配即可工作。有人能帮我吗

import random

oneList = "a ", "b ", "c "
twoList = "d ", "e ", "f "
threeList = "g ", "h ", "i "
fourList = "j ", "k ", "l "

# Selects a letter at random from each list
oneRandom = random.choice(oneList)
twoRandom = random.choice(twoList)
threeRandom = random.choice(threeList)
fourRandom = random.choice(fourList)

# Displays chosen letter from each list
print("These are your letters.")
chosen = oneRandom + twoRandom + threeRandom + fourRandom
print(chosen)

# First user input
start  = input("Would you like to remove a letter? y or n? ")

# If start = yes then do this.
if start == 'y':
    removeLetter = input("What letter would you like to remove? ")

    # Removes user's chosen letter.
    keptLetters = chosen.remove(removeLetter)

    # Displays kept letters.
    print(keptLetters)

---

您的代码中有一个错误，具体如下：

keptLetters = start.remove (removeLetter)

您正在调用变量

start

，但选择的变量

是包含字母列表的变量。因此，这应该是可行的：

keptLetters = chosen.remove (removeLetter)

您的代码中有一些问题。我冒昧地让它更适合你

Python 2
Python 3
有多个列表，并且重复您的代码不是很符合Python。因此，我将“列表”作为元组的元组（因为您可能不打算修改它）。如果是这样，则用方括号
[]
代替括号
（）
来表示列表
由于您在多个列表上执行相同的操作，因此可以使用该函数将所有列表的结果放入一个列表中
selected
应该是一个列表，而不是一个字符串，因为将来您将通过删除一个字母来操作它
您可以轻松地将列表中的所有项目合并为一个字符串，并用一个空格分隔
由于如果值不在列表中，您可以发回
ValueError
，因此您需要在块中处理该值
如果以前的尝试失败，可以用循环来围绕逻辑，不断请求删除一封信
已选择。删除
更改原始数组，因此无需将其保存到
keptLetters
中
我希望这对你有帮助

编辑：添加了等效的Python 2代码
Je pense que sa doitêtreça

import random oneList = "a ", "b ", "c "
twoList = "d ", "e ", "f " 
threeList = "g ", "h ", "i " 
fourList = "j ", "k ", "l " 
# Selects a letter at random from each list 
oneRandom = random.choice(oneList) 
twoRandom = random.choice(twoList) 
threeRandom = random.choice(threeList) 
fourRandom = random.choice(fourList) 
# Displays chosen letter from each list 
print("These are your letters.") chosen = oneRandom + twoRandom + threeRandom + fourRandom print(chosen) 
# First user input 
start = input("Would you like to remove a letter? y or n? ") 
# If start = yes then do this. 
if start == 'y': removeLetter = input("What letter would you like to remove? ") 
# Removes user's chosen letter. 
keptLetters = chosen.remove(removeLetter)
# Displays kept letters. 
print(keptLetters)

您可能会被绊倒，因为
oneList
到
fourList
不是列表，而是元组。重要的是，列表可以变异（例如，可以从列表中删除项），元组不能。列表被
[]
包围，尝试运行
type（）
，您将看到@Kevin在说什么，而不是执行
start.remove
，你可能想从
选择的
中进行切分。问题还不止这些。特别是因为所选的
是一个字符串。@Anderson虽然这是您指出的一个有效错误，但我仍然有问题。我应该意识到我也像其他人说的那样使用元组。你还有其他建议吗？看这个，我很感激，我想我理解你的意思。但是，我在你的代码中发现了这个错误。回溯（最后一次调用）：removeLetter=input中的文件“G:\lettersTwo.py”，第25行（“您要删除哪个字母？”）文件“”，第1行，在名称中错误：未定义名称“b”是否确实正确复制了代码？我假设您正在运行Python 3。我为此做了一个道歉。好吧，对不起。我实际上是在运行Python2。我不知道为什么我还有它。我确实安装了3个。你的计划成功了，谢谢@NickAndrulewicz，我更新了Python 2的答案<代码>映射
结果有点不同，
输入
也有点不同。你可以从中看到。如果你觉得有帮助，请接受答案！
import random

letter_sets = (("a", "b", "c"),
               ("d", "e", "f"),
               ("g", "h", "i"),
               ("j", "k", "l"))

# Selects a letter at random from each list
chosen = list(map(random.choice, letter_sets))

# Displays chosen letter from each list
print("These are your letters.")
print(" ".join(chosen))

# First user input
start = input("Would you like to remove a letter? y or n?")

# If start = yes then do this.
if start[0].lower() == 'y':
    while(len(chosen) == 4): #Keep looping until a letter is chosen
        removeLetter = input("What letter would you like to remove?")
        try:
            # Removes user's chosen letter.
            chosen.remove(removeLetter)
            # Displays kept letters.
            print(" ".join(chosen))
        except ValueError: #If removeLetter is not in chosen
            print(removeLetter, "is not in the list of letters")

import random oneList = "a ", "b ", "c "
twoList = "d ", "e ", "f " 
threeList = "g ", "h ", "i " 
fourList = "j ", "k ", "l " 
# Selects a letter at random from each list 
oneRandom = random.choice(oneList) 
twoRandom = random.choice(twoList) 
threeRandom = random.choice(threeList) 
fourRandom = random.choice(fourList) 
# Displays chosen letter from each list 
print("These are your letters.") chosen = oneRandom + twoRandom + threeRandom + fourRandom print(chosen) 
# First user input 
start = input("Would you like to remove a letter? y or n? ") 
# If start = yes then do this. 
if start == 'y': removeLetter = input("What letter would you like to remove? ") 
# Removes user's chosen letter. 
keptLetters = chosen.remove(removeLetter)
# Displays kept letters. 
print(keptLetters)