正则表达式将组组合成一个字符串

Question

所以这里是一个字符串

[{'display_html': "<img src='/images/C_small.png'/> <b><a href='/u/11339405'>GDcheerios</a></b> achieved rank #936 on <a href='/b/1952051?m=0'>frederic - ONLYWONDER [Singing sometimes]</a> (osu!)", 'beatmap_id': 1952051, 'beatmapset_id': '807885', 'date': datetime.datetime(2021, 6, 1, 5, 17, 11, 80000), 'library': '', 'epic_factor': '1'}, {'display_html': "<img src='/images/A_small.png'/> <b><a href='/u/11339405'>GDcheerios</a></b> achieved rank #77 on <a href='/b/2401143?m=0'>Falcom Sound Team jdk - Desert After Tears [Inferno]</a> (osu!)", 'beatmap_id': 2401143, 'beatmapset_id': '1150262', 'date': datetime.datetime(2021, 6, 1, 4, 21, 3, 80000), 'library': '', 'epic_factor': '1'}]

我有一些正则表达式代码可以从中获取我想要的某些部分

\>(\w+)|( achieved rank .\w+ on )|m=0'>(.*? - .*?\])

问题是他们每个商店都在自己的组中。因此，当我打印 .group() 时，它只会导致

GDcheerios

而我想要的是

GDcheerios 在 frederic 上获得第 936 名 - ONLYWONDER [有时唱歌]

Answer 1

使用BeautifulSoup解析html

例如：

from bs4 import BeautifulSoup
import datetime

data = [{'display_html': "<img src='/images/C_small.png'/> <b><a href='/u/11339405'>GDcheerios</a></b> achieved rank #936 on <a href='/b/1952051?m=0'>frederic - ONLYWONDER [Singing sometimes]</a> (osu!)", 'beatmap_id': 1952051, 'beatmapset_id': '807885', 'date': datetime.datetime(2021, 6, 1, 5, 17, 11, 80000), 'library': '', 'epic_factor': '1'}, {'display_html': "<img src='/images/A_small.png'/> <b><a href='/u/11339405'>GDcheerios</a></b> achieved rank #77 on <a href='/b/2401143?m=0'>Falcom Sound Team jdk - Desert After Tears [Inferno]</a> (osu!)", 'beatmap_id': 2401143, 'beatmapset_id': '1150262', 'date': datetime.datetime(2021, 6, 1, 4, 21, 3, 80000), 'library': '', 'epic_factor': '1'}]

for i in data:
    s = BeautifulSoup(i['display_html'], 'html.parser')
    print(s.text)

输出：

 GDcheerios achieved rank #936 on frederic - ONLYWONDER [Singing sometimes] (osu!)
 GDcheerios achieved rank #77 on Falcom Sound Team jdk - Desert After Tears [Inferno] (osu!)

Answer 2

在findall 的帮助下。可能不是最优雅的，但它确实有效：

import re

target_string = r"[{'display_html': \"<img src='/images/C_small.png'/> <b><a href='/u/11339405'>GDcheerios</a></b> achieved rank #936 on <a href='/b/1952051?m=0'>frederic - ONLYWONDER [Singing sometimes]</a> (osu!)\", 'beatmap_id': 1952051, 'beatmapset_id': '807885', 'date': datetime.datetime(2021, 6, 1, 5, 17, 11, 80000), 'library': '', 'epic_factor': '1'}, {'display_html': \"<img src='/images/A_small.png'/> <b><a href='/u/11339405'>GDcheerios</a></b> achieved rank #77 on <a href='/b/2401143?m=0'>Falcom Sound Team jdk - Desert After Tears [Inferno]</a> (osu!)\", 'beatmap_id': 2401143, 'beatmapset_id': '1150262', 'date': datetime.datetime(2021, 6, 1, 4, 21, 3, 80000), 'library': '', 'epic_factor': '1'}]"

result = re.findall(r"\>(\w+)|( achieved rank .\w+ on )|m=0'>(.*? - .*?\])", target_string)

for i in range(2):
    print(result[i*3][0] + result[i*3+1][1] + result[i*3+2][2])

输出：

GDcheerios achieved rank #936 on frederic - ONLYWONDER [Singing sometimes]
GDcheerios achieved rank #77 on Falcom Sound Team jdk - Desert After Tears [Inferno]

Answer 3

您可以从上述正则表达式生成单个表达式。这将返回一个包含所有匹配项的元组，您可以使用''.join 快速组合这些匹配项。您唯一需要做的就是将管道 (|) 替换为 .+。

html = """
[{'display_html': "<img src='/images/C_small.png'/> <b><a href='/u/11339405'>GDcheerios</a></b> achieved rank #936 on <a href='/b/1952051?m=0'>frederic - ONLYWONDER [Singing sometimes]</a> (osu!)", 'beatmap_id': 1952051, 'beatmapset_id': '807885', 'date': datetime.datetime(2021, 6, 1, 5, 17, 11, 80000), 'library': '', 'epic_factor': '1'}, {'display_html': "<img src='/images/A_small.png'/> <b><a href='/u/11339405'>GDcheerios</a></b> achieved rank #77 on <a href='/b/2401143?m=0'>Falcom Sound Team jdk - Desert After Tears [Inferno]</a> (osu!)", 'beatmap_id': 2401143, 'beatmapset_id': '1150262', 'date': datetime.datetime(2021, 6, 1, 4, 21, 3, 80000), 'library': '', 'epic_factor': '1'}]
[{'display_html': "<img src='/images/C_small.png'/> <b><a href='/u/11339405'>GDcheerios</a></b> achieved rank #936 on <a href='/b/1952051?m=0'>frederic - ONLYWONDER [Singing sometimes]</a> (osu!)", 'beatmap_id': 1952051, 'beatmapset_id': '807885', 'date': datetime.datetime(2021, 6, 1, 5, 17, 11, 80000), 'library': '', 'epic_factor': '1'}, {'display_html': "<img src='/images/A_small.png'/> <b><a href='/u/11339405'>GDcheerios</a></b> achieved rank #77 on <a href='/b/2401143?m=0'>Falcom Sound Team jdk - Desert After Tears [Inferno]</a> (osu!)", 'beatmap_id': 2401143, 'beatmapset_id': '1150262', 'date': datetime.datetime(2021, 6, 1, 4, 21, 3, 80000), 'library': '', 'epic_factor': '1'}]
"""
result = re.findall(r"\>(\w+).+( achieved rank .\w+ on ).+m=0'>(.*? - .*?\])", html)

for each in result:
    print(''.join(each))

输出：

GDcheerios achieved rank #77 on Falcom Sound Team jdk - Desert After Tears [Inferno]
GDcheerios achieved rank #77 on Falcom Sound Team jdk - Desert After Tears [Inferno]