python - 如何用字符串中的另一个正则表达式替换一个正则表达式

Question

这个question展示了如何用另一个这样的正则表达式替换一个正则表达式

$string = '"SIP/1037-00000014","SIP/CL-00000015","Dial","SIP/CL/61436523277,45"';
$$pattern = '["SIP/CL/(\d*),(\d*)",]';
$replacement = '"SIP/CL/\1|\2",';
$string = preg_replace($pattern, $replacement, $string);
print($string);

但是，我无法调整该模式来解决我想要删除位于 2 个单词之间但不在单词和数字之间的句号的情况:

text = 'this . is bad. Not . 820'
regex1 = r'(\w+)(\s\.\s)(\D+)'
regex2 = r'(\w+)(\s)(\D+)'
re.sub(regex1, regex2, text)

# Desired outcome:
'this is bad. Not . 820'

基本上我喜欢删除两个字母单词之间的.。有人可以帮我解决这个问题吗？预先感谢您。

Answer 1

这些表达方式可能与您的想法很接近:

\s[.](?=\s\D)

或

(?<=\s)[.](?=\s\D)

测试

import re

regex = r"\s[.](?=\s\D)"
test_str = "this . is bad. Not . 820"
print(re.sub(regex, "", test_str))

输出

this is bad. Not . 820

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If you wish to explore/simplify/modify the expression, it's been explained on the top right panel of regex101.com. If you'd like, you can also watch in this link, how it would match against some sample inputs.

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