正则表达式，用逗号替换客户评论中的一些点

Question

我需要编写一个正则表达式，用'.'替换一些患者关于药物的评论中的','。他们应该在提到副作用后用逗号，但有些人用圆点。例如：

text = "the drug side-effects are: night mare. nausea. night sweat. bad dream. dizziness. severe headache.  I suffered. she suffered. she told I should change it."

我编写了一个正则表达式代码来检测一个单词（如头痛）或两个单词（如恶梦）周围的两点：

检测被两点包围的单词：

text=  re.sub (r'(\.)(\s*\w+\s*\.)',r',\2 ', text )

检测被两点包围的两个单词：

text =  re.sub (r'(\.)(\s*\w+\s\w+\s*\.)',r',\2 ', text11 )

这是输出：

the drug side-effects are: night mare, nausea,  night sweat.  bad dream, dizziness,  severe headache.   I suffered, she suffered.  she told I should change it.

但应该是：

the drug side-effects are: night mare, nausea,  night sweat,  bad dream, dizziness,  severe headache.   I suffered. she suffered.  she told I should change it.

我的代码没有替换dot之后的night sweat to ','。我加上，if a sentence starts with a subject pronoun (such as I and she) I do not want to change dot to comma after it, even if it has two words (such as, I suffered)。我不知道如何将此条件添加到我的代码中。你知道吗

有什么建议吗？谢谢您！你知道吗

Answer 1

可以使用以下模式：

\.(\s*(?!(?:i|she)\b)\w+(?:\s+\w+)?\s*)(?=[^\w\s]|$)

这个匹配一个点，然后捕获一个或两个单词，其中第一个不是你提到的代词（你很可能需要扩展这个列表）。后面必须跟一个既不是单词字符也不是空格的字符（例如.!:,）或字符串的结尾。你知道吗

然后必须用,\1替换它

在python中

import re
text = "the drug side-effects are: night mare. nausea. night sweat. bad dream. dizziness. severe headache.  I suffered. she suffered. she told I should change it."
text = re.sub(r'\.(\s*(?!(?:i|she)\b)\w+(?:\s+\w+)?\s*)(?=[^\w\s]|$)', r',\1', text, flags=re.I)
print(text)

输出

the drug side-effects are: night mare, nausea, night sweat, bad dream, dizziness, severe headache.  I suffered. she suffered. she told I should change it.

这可能不是绝对的故障保护，您可能需要为某些边缘情况扩展模式。你知道吗