未能从事件列表站点筛选元素字符串

Question

我正在学习Python3进行网络抓取，下面是我的代码：

import requests
url = 'https://beijing.douban.com/events/week-all'
req = requests.get(url)
from bs4 import BeautifulSoup

soup = BeautifulSoup(req.text,'html.parser')
events = soup.find('ul',{'class':'events-list'}).findAll('li')

for event in events:
    event_details = dict()
    event_details['title']= event.find('div',{'class':'title'})
f = open('douban8.txt','a',encoding='utf-8')
print(event_details,file=f)

我得到的结果如下：

**{'title': <div class="title">
<a href="https://www.douban.com/event/31568343/" itemprop="url" title="年度动作奇幻大片《海王》北京IMAX 3D零点场免费观影来了！">
<span itemprop="summary">年度动作奇幻大片《海王》北京IMAX 3D零点场免费观影来了！</span>
</a>
</div>}
{'title': None}
{'title': None}
{'title': None}
{'title': None}**

我想要的只是标签之间的字符串，但是我不能从整个文本中去掉标记。我尝试了.string或.text以及其他一些方法，都失败了。有人能给我一些建议吗？

感谢@sohan-das，我在这里更新代码：

import requests
url = 'https://beijing.douban.com/events/week-all'
req = requests.get(url)
from bs4 import BeautifulSoup

soup = BeautifulSoup(req.text,'html.parser')
events = soup.find('ul',{'class':'events-list'}).findAll('li')

for event in events:

    event_details=dict()
    try:
        event_details['title'] = event.find('div'{'class','title'}).text.strip()
        f = open('douban9.txt', 'a', encoding='utf-8')
        print(event_details, file=f)
    except AttributeError:
        pass
    continue

它现在起作用了

Answer 1

event_details需要列表，而不是dict，并将其置于循环之外。元素在events列表中有超过10个元素，您需要对其进行筛选。

.....
events = soup.find('ul', {'class':'events-list'}).findAll('li')

event_details = []
for event in events:
    event_title = event.find('div', {'class':'title'})
    # if element not have div.title skip
    if event_title:
        event_details.append({'title' : event_title.text.strip()}) 

f = open('douban8.txt','a',encoding='utf-8')
print(event_details,file=f)

结果

[
  {'title': '年度动作奇幻大片《海王》北京IMAX 3D零点场免费观影来了！'},
  ....,
  {'title': '在被认可前，先让自己更专业！「42时」纪录片导演制作班第二季'}
]