用BeautifulSoup刮除<span>流

替代解决方案:您可以使用 re 提取平均评分的模块:

import re
from bs4 import BeautifulSoup

txt = '''<span class="greyText smallText">
                avg rating 4.02 —
                132,623 ratings  —
                published 2014
              </span>
<span class="greyText smallText">
                avg rating 4.03 —
                82,319 ratings  —
                published 2015
              </span>'''

soup = BeautifulSoup(txt, 'html.parser')

for span in soup.select('span.greyText.smallText'):
    avg_rating = re.search(r'avg rating ([\d.]+)', span.text)
    if avg_rating:
        print(avg_rating[1])

打印:

4.02
4.03

In [32]: [i.text.strip() for i in soup.find_all("span",class_="greyText smallText")]
Out[32]:
['avg rating 4.02 —\n                132,623 ratings  —\n                published 2014',
 'avg rating 4.03 —\n                82,319 ratings  —\n                published 2015']

评级为单独值:

In [48]: [i.text.strip().split("\n")[0] for i in soup.find_all("span",class_="greyText smallText")]
Out[48]: ['avg rating 4.02 —', 'avg rating 4.03 —']