使用BeautifulSoup进行刮擦移动到下一页

Question

我需要从一个网站刮去内容（只是标题）。我做了一个页面，但我会需要做的网站上的所有页面。目前，我正在做以下工作：

import bs4, requests
import pandas as pd
import re

headers = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36'}
    
    
r = requests.get(website, headers=headers)
soup = bs4.BeautifulSoup(r.text, 'html')


title=soup.find_all('h2')

我知道，当我移动到下一页时，url会发生如下变化：

website/page/2/
website/page/3/
... 
website/page/49/
...

我尝试使用next_page_url=base_url+next_page_partial构建一个递归函数，但它不会移动到下一页。

if soup.find("span", text=re.compile("Next")):
    page = "https://catania.liveuniversity.it/notizie-catania-cronaca/cronacacatenesesicilina/page/".format(page_num)
    page_num +=10 # I should scrape all the pages so maybe this number should be changed as I do not know at the beginning how many pages there are for that section
    print(page_num)
else:
    break

我遵循这个问题（和答案）：移动到下一页使用BeautifulSoup刮刮

如果你需要更多的信息请告诉我。多谢

更新的代码：

import bs4, requests
import pandas as pd
import re

headers = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36'}

page_num=1
website="https://catania.liveuniversity.it/notizie-catania-cronaca/cronacacatenesesicilina"

while True:
  r = requests.get(website, headers=headers)
  soup = bs4.BeautifulSoup(r.text, 'html')


  title=soup.find_all('h2')

  if soup.find("span", text=re.compile("Next")):
      page = f"https://catania.liveuniversity.it/notizie-catania-cronaca/cronacacatenesesicilina/page/{page_num}".format(page_num)
      page_num +=10
  else:
      break

Answer 1

如果使用f“url/{page_num}”，则删除格式(page_num)。

您可以使用以下任何您想要的内容：

page=f“https://catania.liveuniversity.it/notizie-catania-cronaca/cronacaCateneseSicilina/page/{page_num}”

或

page=“https://catania.liveuniversity.it/notizie-catania-cronaca/cronacaCateneseSicilina/page/{}”。format(page_num)

祝你好运！

最终的答案是：

import bs4, requests
import pandas as pd
import re

headers = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36'}

page_num=1
website="https://catania.liveuniversity.it/notizie-catania-cronaca/cronacacatenesesicilina"

while True:
  r = requests.get(website, headers=headers)
  soup = bs4.BeautifulSoup(r.text, 'html')


  title=soup.find_all('h2')

  if soup.find("span", text=re.compile("Next")):
      website = f"https://catania.liveuniversity.it/notizie-catania-cronaca/cronacacatenesesicilina/page/{page_num}"
      page_num +=1
  else:
      break