Beautiful soup simple python error with finding elements within elements?

问题

I've come across a BS4 error that gives no explanation, at least not one I understand, could someone help me know what it means? here is the code:

    soup = BeautifulSoup(browser.page_source, "html.parser")
    soup.prettify()
    container = soup.find('table', {'id': 'RmvMainTable'})
    containerlv2 = container.find('tr')
    # related_files = containerlv2[6].find('div')
    # print(related_files)
    for re_file in containerlv2[6].find('div'):
        print("lol")

and here is the error:

Traceback (most recent call last):
 File "/home/user/Python projects/test/test3.py", line 162, in <module>
  for re_file in containerlv2[6].find('div'):
 File "/usr/lib/python3/dist-packages/bs4/element.py", line 958, in __getitem__
  return self.attrs[key]
 KeyError: 6

if you notice the # out code it gives the exact same error

回答1:

containerlv2 is a tag object, and it does not have 6 as key, therefore you got KeyError: 6

If you are trying to search for div tag in the 7th tr tag, the correct way should be:

containerlv2 = container.find_all('tr')
related_files = containerlv2[6].find('div')

First you use find_all to get all tr tags in container and put them into a list containerlv2, and then you search for div in the 7th tag of containerlv2

回答2:

containerlv2 = container.find('tr')

this will return a tag object, and you index a tag object like this

containerlv2[6]

来源：https://stackoverflow.com/questions/41007728/beautiful-soup-simple-python-error-with-finding-elements-within-elements