如何使用 bs4 浏览 html？

Question

今天下午刚开始学习python。尝试抓取 kubuntu.org（简单 html）的 rss 提要作为练习，但我不知道如何浏览 html 并只打印提要标题：

#!/usr/bin/python3.5
import bs4 as bs
import urllib.request

site = urllib.request.urlopen('https://kubuntu.org/feed').read()
soup = bs.BeautifulSoup(site, 'lxml')

for title in soup.find_all('item'):
    print(title.text)

编辑：

将title 添加到find_all 行有点像我想要的，但仍有大量数据也使用标题标签。

#!/usr/bin/python3.5
import bs4 as bs
import urllib.request

site = urllib.request.urlopen('https://kubuntu.org/feed').read()
soup = bs.BeautifulSoup(site, 'lxml')

for title in soup.find_all(['item', 'title']):
    print(title.text)

Answer 1

只需访问title标签作为item的子节点：

...
for item in soup.find_all('item'):
    print(item.title.text)

输出：

Kubuntu Artful Aardvark (17.10) Alpha 1
Latest round of backports PPA updates include Plasma 5.10.2 for Zesty 17.04
Plasma 5.10.1 now in Zesty backports
17.10 Wallpaper Contest deadline for submissions soon
Plasma bugfix releases, Frameworks, & selected app updates now available in backports PPA for Zesty and Xenial
17.10 Wallpaper Contest! Call for artists
KDE PIM update now available for Zesty Zapus 17.04
KDE PIM update for Zesty available for testers
Kubuntu 17.04 Released!
Kubuntu 17.04 Release Candidate – call for testers