用BeautifulSoup(re.text, lxml)，关于beautifulsoup 与 lxml 的问题
import requests
from bs4 import BeautifulSoup
import re
sum = 0
r = requests.get('https://book.douban.com/subject/5299764/comments/')
soup = BeautifulSoup(r.text, 'lxml')
pattern = soup.find_all('p','comment-content')
for item in pattern:
print(item.string)
pattern_s = re.compile('<span class="user-stars allstar(.*?) rating"')
p = re.findall(pattern_s, r.text)
for star in p:
sum += int(star)
print(sum)在运行时，出错，与lxml有关
求大神，帮忙
