尝试从网页中提取一些数据(抓取初学者)
尝试从网页中提取一些数据(抓取初学者)
提问于 2019-02-21 02:04:53
我正在尝试使用请求、和Beautifulsoup.从网页中提取一些数据我首先获取带有请求的html代码，然后将其“放入”Beautifulsoup中：
from bs4 import BeautifulSoup
import requests
result = requests.get("https://XXXXX")
#print(result.status_code)
#print(result.headers)
src = result.content
soup = BeautifulSoup(src, 'lxml')然后我挑出了一些代码：
tags = soup.findAll('ol',{'class':'activity-popup-users'})
print(tags)这是我得到的一部分：
<div class="account js-actionable-user js-profile-popup-actionable " data-emojified-name="" data-feedback-token="" data-impression-id="" data-name="The UN Times" data-screen-name="TheUNTimes" data-user-id="3787869561">我现在想要的是提取data-user-id=之后的数据，它由""之间的数字组成。然后我希望将这些数据输入到某种计算表中。我是一个绝对的初学者，我正在粘贴我在教程或文档中找到的代码。非常感谢你抽出时间来。
编辑:所以这是我尝试过的：
from bs4 import BeautifulSoup
import requests
result = requests.get("https://XXXX")
src = result.content
soup = BeautifulSoup(src, 'html.parser')
tags = soup.findAll('ol',{'class':'activity-popup-users'})
print(tags['data-user-id'])下面是我得到的信息：
TypeError: list indices must be integers or slices, not str所以我试了一下：
from bs4 import BeautifulSoup
import requests
result = requests.get("https://XXXX")
src = result.content soup = BeautifulSoup(src, 'html.parser')
#tags = soup.findAll('a',{'class':'account-group js-user-profile-link'})
tags = soup.findAll('ol',{'class':'activity-popup-users'})
tags.attrs
#print(tags['data-user-id'])并得到了：
File "C:\Users\XXXX\element.py", line 1884, in __getattr__
"ResultSet object has no attribute '%s'. You're probably treating a list of items like a single item. Did you call find_all() when you meant to call find()?" % key
AttributeError: ResultSet object has no attribute 'attrs'. You're probably treating a list of items like a single item. Did you call find_all() when you meant to call find()?回答 1
Stack Overflow用户
回答已采纳
发布于 2019-02-21 02:09:49
您可以通过将标记视为属性-值字典来获取标记的任何属性值。
Read the BeautifulSoup documentation on attributes.
tag['data-user-id']例如
html="""
<div class="account js-actionable-user js-profile-popup-actionable " data-emojified-name="" data-feedback-token="" data-impression-id="" data-name="The UN Times" data-screen-name="TheUNTimes" data-user-id="3787869561">
"""
from bs4 import BeautifulSoup
soup=BeautifulSoup(html,'html.parser')
tag=soup.find('div')
print(tag['data-user-id'])输出
3787869561编辑以包括OP的问题更改：
from bs4 import BeautifulSoup
import requests
result = requests.get("http://twitter.com/RussiaUN/media")
src = result.content
soup = BeautifulSoup(src, 'html.parser')
divs = soup.find_all('div',class_='account')
#just print
for div in divs:
print(div['data-user-id'])
#write to a file
with open('file.txt','w') as f:
for div in divs:
f.write(div['data-user-id']+'\n')输出：
255471924
2154112404
408696260
1267887043
475954041
3787869561
796979978
261711504
398068796
1174451010
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原文链接：
https://stackoverflow.com/questions/54792663
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