parsing tables with img tags in python with BeautifulSoup

问题

I am using BeautifulSoup to parse an html page. I need to work on the first table in the page. That table contains a few rows. Each row then contains some 'td' tags and one of the 'td' tags has an 'img' tag. I want to get all the information in that table. But if I print that table I don't get any data related to the 'img' tag.

I am using soap.findAll("table") to get all the tables then chose the first table for processing. The html looks something like this:

<table id="abc"
  <tr class="listitem-even">
    <td class="listitem-even">
      <table border = "0"> <tr> <td class="gridcell">
               <img id="img_id" title="img_title" src="img_src" alt="img_alt" /> </td> </tr>
      </table>
    </td>
    <td class="listitem-even"
      <span>some_other_information</span>
    </td>
  </tr>
</table>

How can I get all the data in the table including the 'img' tag ? Thanks,

回答1:

You have a nested table, so you need to check where you are in the tree, prior to parsing tr/td/img tags.

from bs4 import BeautifulSoup
f = open('test.html', 'rb')
html = f.read()
f.close()
soup = BeautifulSoup(html)

tables = soup.find_all('table')

for table in tables:
     if table.find_parent("table") is not None:
         for tr in table.find_all('tr'):
                 for td in table.find_all('td'):
                         for img in td.find_all('img'):
                                 print img['id']
                                 print img['src']
                                 print img['title']
                                 print img['alt']

It returns the following based on your example:

img_id
img_src
img_title
img_alt

来源：https://stackoverflow.com/questions/18804702/parsing-tables-with-img-tags-in-python-with-beautifulsoup