用BeautifulSoup无法计数空标签？

Question

我已经有一个look对其他问题进行了汇总，但我找不到任何东西。

我的HTML看起来像

<div class="rating-input"> 
    <i data-value="1" class="rating-active-star"></i> 
    <i data-value="2" class="rating-active-star"></i> 
    <i data-value="3" class="rating-active-star"></i> 
    <i data-value="4" class="rating-active-star"></i> 
    <i data-value="5" class="rating-inactive-star"></i> 
</div> 

而且我行多数民众赞成失败是这样的：

details = [{"name": film.select('h2')[0].text.split('\n')[0], 
      "rating":len(film.select('div i.rating-inactive-star'))} 
      for film in detail_row] 

因为它带回了这一点：

[{'name': 'The LEGO Batman Movie', 'rating': 0}, 
{'name': 'Sing', 'rating': 0}, 
{'name': 'John Wick: Chapter 2', 'rating': 0}, 
{'name': 'Fifty Shades Darker', 'rating': 0}, 
{'name': 'The Great Wall', 'rating': 0}, 
{'name': 'Hidden Figures', 'rating': 0}, 
{'name': 'La La Land', 'rating': 0}, 
{'name': 'The Founder', 'rating': 0}, 
{'name': 'Hacksaw Ridge', 'rating': 0}, 
{'name': 'T2 Trainspotting', 'rating': 0}, 
{'name': 'Split', 'rating': 0}, 
{'name': 'Patriots Day', 'rating': 0} 
] 

，所有的收视率都为零。我期望的是i元素的数量与类rating-active-star（例如4，为上述html）。

凡为我的等级选择改变从'div i.rating-active-star'到'div i'所有'rating': 0成为'rating': 5

这里是我的整个脚本（或多或少的MVP）：

import requests 
import bs4 
data = "si=1010841&sort=cin&max=0&bd=2017-02-23&css=cat-&mod=cinemapage_movie_list&attrs=2D%2C3D%2CIMAX%2CViP%2CVIP%2CDBOX%2C4DX%2CM4J%2CSS" 
data_list = data.split('&') 
info = {item[0]:item[1] for item in [elem.split('=') for elem in data_list]} 
response = requests.post('https://www.cineworld.co.uk/pgm-list-byfeat',info) 
soup = bs4.BeautifulSoup(response.text, "html.parser") 
detail_row = soup.select('div[id^=film_] div.row div.col-sm-10') 
details = [{"name": film.select('h2')[0].text.split('\n')[0], 
      "rating":len(film.select('div i.rating-active-star'))} 
      for film in detail_row] 

为什么一个列表的长度空标签的长度与非空标签的长度有什么不同？我该如何解决这个问题？

Answer 1

问题可能在其他地方。此片段似乎按预期工作：

from bs4 import BeautifulSoup 

html = ''' 
<div class="rating-input"> 
<i data-value="1" class="rating-active-star"></i> 
<i data-value="2" class="rating-active-star"></i> 
<i data-value="3" class="rating-active-star"></i> 
<i data-value="4" class="rating-active-star"></i> 
<i data-value="5" class="rating-inactive-star"></i> 
</div> 
''' 

soup = BeautifulSoup(html, 'html.parser') 
print (len(soup.select('div i.rating-inactive-star')), 
     len(soup.select('div i.rating-active-star')))