DeprecationWarning：无效的转义序列-使用什么代替 d？

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我re在Python 3.6.5中遇到了模块问题。我的正则表达式中有以下模式：

'\\nRevision: (\d+)\\n'

但是，当我运行它时，我得到了DeprecationWarning。

我在SO上搜索了问题，但没有找到答案，实际上-我应该用什么代替\d+？只是[0-9]+还是其他？

I’ve met a problem with re module in Python 3.6.5. I have this pattern in my regular expression:

'\\nRevision: (\d+)\\n'

But when I run it, I’m getting a DeprecationWarning.

I searched for the problem on SO, and haven’t found the answer, actually – what should I use instead of \d+? Just [0-9]+ or maybe something else?

回答 0

Python 3将字符串文字解释为Unicode字符串，因此您\d被视为转义的Unicode字符。

将RegEx模式声明为原始字符串，而不是通过在前面加上r，如下所示：

r'\nRevision: (\d+)\n'

这也意味着您也可以删除转义\n符，因为这些转义符仅会被解析为换行符re。

Python 3 interprets string literals as Unicode strings, and therefore your \d is treated as an escaped Unicode character.

Declare your RegEx pattern as a raw string instead by prepending r, as below:

r'\nRevision: (\d+)\n'

This also means you can drop the escapes for \n as well since these will just be parsed as newline characters by re.