爬虫程序一直运行不完，是写的正则式不对吗

把代码复制出来，不要截图

from urllib import request, parse
import re
import time
import random
import pprint

headers = {"User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:65.0) Gecko/20100101 Firefox/65.0"} 

url = "https://www.douban.com/gallery/all?column_id=5"

req = request.Request(url=url, headers=headers) 
res = request.urlopen(req) 
html = res.read().decode("utf-8")

mylist = re.findall(r'<li class="topic-link">(.*?)</li>', html, re.S) 

pprint.pprint(mylist)

你是想全用标准库吗?