重新查找类别S和P的错误转义[重复]

Question

此问题已经在这里有了答案：

• Python regex matching Unicode properties6个答案

我正在尝试从字符串中删除所有标点符号和特殊字符，包括数字，但出现错误：error: bad escape \p at position 2

这是否意味着python的正则表达式无法识别\p{S}和\p{P}

代码是：

name = "URL-dsds diasa:dksdjsk dskdjs_dskjdks 23232 dsds32 dskdjskds&dsjdsjdhs fddjfd%djshdhjs kdjs¤dskjds öfdfdjfkdj"
re.findall(r'[^\p{P}\p{S}\s\d]+', name.lower())

我希望输出与regex101突出显示的相同：https://regex101.com/r/HJZAUU/1

有帮助吗？

Answer 1

是，很不幸。

查看regex101.com将样式更改为Python，然后将正则表达式粘贴到顶部的字段中：

在右侧为您提供此信息：

[^\p{P}\p{S}\s\d]+

gm <Python>
Match a single character not present in the list below [^\p{P}\p{S}\s\d]+
+ Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)
\p matches the character p literally (case sensitive) <<<<<<<<<<<<<<<<<<<<<<<<<<<<
{P} matches a single character in the list {P} (case sensitive)<<<<<<<<<<<<<<<<<<
\p matches the character p literally (case sensitive)
{S} matches a single character in the list {S} (case sensitive)
\s matches any whitespace character (equal to [\r\n\t\f\v ])
\d matches a digit (equal to [0-9])

Answer 2

我跟随@WiktorStribiżew评论，使用PyPi正则表达式，因为它支持Unicode类别类。所以我只是做了：

pip install regex
import regex as re
name = "URL-dsds diasa:dksdjsk dskdjs_dskjdks 23232 dsds32 dskdjskds&dsjdsjdhs fddjfd%djshdhjs kdjs¤dskjds öfdfdjfkdj"
re.findall(r'[^\p{P}\p{S}\s\d]+', name.lower())

我得到输出：
[''url'，'dsds'，'diasa'，'dksdjsk'，'dskdjs'，'dskjdks'，'dsds'，'dskdjskds'，'dsjdsjdhs'，'fddjfd'，'djshdhjs'，'kdjs'，'dskjds'，'öfdfdjfkdj']