替換字符串中除一種類型之外的所有字符：Python

Question

 choice = "lillian"
 firstpick = "l"

 for n in choice:
    if n != firstpick:
       inverse = n
       if inverse in choice:
           print(choice.replace(inverse,'-'))

此代碼所需的 output 應該是“l-ll---”但它是“l-ll-an”“l-ll-an”“lilli-n”“lillia-”

對此感到抱歉，我不是最擅長代碼，但我會很感激一個解決方案。 謝謝！

Answer 1

這是一種選擇：

choice = "lillian"
firstpick = "l"
''.join([c if c==firstpick else '-' for c in choice])

Answer 2

字符串是不可變的，因此您需要存儲替換的結果。 嘗試這個：

choice = "lillian"
firstpick = "l"

for letter in choice:
    if letter != firstpick:
       choice = choice.replace(letter, '-')

print(choice)

Answer 3

您可以在@OfirY 的答案中用生成器表達式替換列表理解，如下所示：

choice = 'Lillian'
firstpick = 'l'
''.join(c if c == firstpick else '-' for c in choice)