Python 中的正则表达式反向引用问题 [英] Issue with regex backreference in Python

问题描述

我不确定为什么这不起作用.也许我在 Python 正则表达式中遗漏了一些东西.

I am not sure why this is not working. Perhaps I am missing something with Python regex.

这是我的正则表达式和我希望它匹配的示例字符串:

Here is my regex and an example string of what I want it to match too:

    PHONE_REGEX        = "<(.*)>phone</\1>"
    EXAMPLE            = "<bar>phone</bar>"

我单独测试了这场比赛，但失败了.我使用了一个在线正则表达式测试器，它匹配.我是否只是遗漏了 Python 正则表达式特有的东西?

I tested this match in isolation and it failed. I used an online regex tester and it matched. Am I simply missing something that is particular to Python regex?

谢谢！

推荐答案

你必须将字符串标记为原始字符串，因为 \ 在那里，通过放置一个 r 在正则表达式前:

You have to mark the string as a raw string, due to the \ in there, by putting an r in front of the regex:

m = re.match(r"<(.*)>phone</\1>", "<bar>phone</bar>")

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