Python 1単語だけ取り出せない

Question

リストにある英単語から"!"を取り除いて表示し、""error"という英単語のみを表示したいのですが
どこを直せばいいですか。```

コード
string_list = ["p!ytho!n","ta!sk","mis!sion","error!","b!i!g","prob!!lem","this!!"]

for st in string_list:
if "!" in st:
break
else:
print(st.replace("!",""))

Answer 1

コードからすると、bを含む文字列の一つ前の文字列の"!"を取り除いて表示したいという意味なのかなと思います。

そういうのが欲しければ、

string_list = ["p!ytho!n","ta!sk","mis!sion","error!","b!i!g","prob!!lem","this!!"]
last = ""

for st in string_list:
    if "b" in st:
        print(last.replace("!",""))
        break
    else:
        last = st

実行結果は以下です。

>>> string_list = ["p!ytho!n","ta!sk","mis!sion","error!","b!i!g","prob!!lem","this!!"]
>>> last = ""
>>>
>>> for st in string_list:
...     if "b" in st:
...         print(last.replace("!",""))
...         break
...     else:
...         last = st
...
error

Answer 2

正規表現を使えば簡単。

import re

string_list = ["p!ytho!n","ta!sk","mis!sion","error!","b!i!g","prob!!lem","this!!"]
for st in string_list:
  print(st.replace("!",""))

Comments

[udon-ken]

え！？
どこに正規表現が・・・笑