Python：用re.sub替换列表中的多个特定单词

Question

我有以下字符串和列表“changewords”。我想用{word from list}替换{word from list}\n:'我不想替换'\n'的所有实例

string = "Foo \n value of something \n Bar \n Another value \n"
changewords = ["Foo", "Bar"]

期望输出：

'Foo: value of something \n Bar: Another value \n'

我试过以下方法

for i in changewords:
    tem = re.sub(f'{i} \n', f'{i}:', string)
tem
Output: 'Foo \n value of something \n Bar: Another value \n'

及

changewords2 = '|'.join(changewords)
tem = re.sub(f'{changewords2} \n', f'{changewords2}:', string)
tem
Output: 'Foo|Bar: \n value of something \n Foo|Bar: Another value \n'

如何获得所需的输出

Answer 1

您可以使用以下代码：

import re

string = "Foo \n value of something \n Bar \n Another value \n"
changewords = ["foo", "Bar"]

tem = string
for i in changewords:
    tem = re.sub(f'(?i){i} \n', f'{i}:', tem)
print( tem )

输出：

foo: value of something
 Bar: Another value

注意tem = string初始化tem值，然后在for循环中使用re.subon tem并将返回结果赋给tem本身

(?i)用于忽略大小写匹配

Code Demo