python使用beautifulsoup问题

cx20100102

  这里是代码

1. import sys
   
2. import urllib
   
3. from urllib import request
   
4. import os
   
5. from bs4 import BeautifulSoup
   
6. 
   
7. class DramaItem:
   
8.     def __init__(self, num, title, url):
   
9.         self.num = num
   
10.         self.title = title
    
11.         self.url = url
    
12.     def __str__(self):
    
13.         return self.num + '    ' + self.title
    
14.     def openDrama(self):
    
15.         os.startfile(self.url)
    
16. response = urllib.request.urlopen('URL')
    
17. html = response.read()
    
18. soup = BeautifulSoup(html)
    
19. dramaList = soup.findAll('div', attrs={'class':'list_block1 align_c'})
    
20. dramaItems = []
    
21. if(dramaList):
    
22.     lis = dramaList[0].findAll('li')
    
23.     for li in lis:
    
24.         ps = li.findAll('p')
    
25.         description = ps[1].text if len(ps)>1 else ''
    
26.         num = ps[0].find('a').text
    
27.         url = ps[0].find('a')['href']
    
28.         di = DramaItem(num, description, url)
    
29.         dramaItems.append(di)
    
30. for di in dramaItems:
    
31.     print(di)
    
32. diLen = len(dramaItems)
    
33. userChoice = int(input('input number to watch the drama:'))
    
34. if userChoice >= 1 and userChoice <=diLen:
    
35.     dramaItems[userChoice-1].openDrama()

复制代码

里面的dramaList = soup.findAll('div', attrs={'class':'list_block1 align_c'})中
attrs={'class':'list_block1 align_c'}这句怎么解释