Python 弃用警告：无效的转义序列 - 用什么代替 \d？
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DeprecationWarning: invalid escape sequence - what to use instead of \d?
提问by mchfrnc
I've met a problem with remodule in Python 3.6.5.
I have this pattern in my regular expression:
我re在 Python 3.6.5 中遇到了模块问题。我的正则表达式中有这个模式：
'\nRevision: (\d+)\n'
But when I run it, I'm getting a DeprecationWarning.
但是当我运行它时，我得到了一个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by ACascarino
Python 3 interprets string literals as Unicode strings, and therefore your \dis treated as an escaped Unicode character.
Python 3 将字符串文字解释为 Unicode 字符串，因此您将\d被视为转义的 Unicode 字符。
Declare your RegEx pattern as a raw string instead by prepending r, as below:
将您的 RegEx 模式声明为原始字符串，而不是在前面加上r，如下所示：
r'\nRevision: (\d+)\n'
This also means you can drop the escapes for \nas well since these will just be parsed as newline characters by re.
这也意味着您也可以删除转义\n符，因为它们只会被re.
