BS4: AttributeError: 'NoneType' object stops the parser from working - wordpress

Question

I'm currently working on a parser to make a small preview of a page from a URL given by the user in PHP.
I'd like to retrieve only the title of the page and a little chunk of information (a bit of text)
The project: for a list of meta-data of popular wordpress-plugins and gathering the first 50 URLs - that are 50 plugins which are of interest! The challenge is: i want to fetch meta-data of all the existing plugins. What i subsequently want to filter out after the fetch is - those plugins that have the newest timestamp - that are updated (most) recently. It is all aobut acutality...
https://wordpress.org/plugins/wp-job-manager
https://wordpress.org/plugins/ninja-forms
import requests
from bs4 import BeautifulSoup
from concurrent.futures.thread import ThreadPoolExecutor
url = "https://wordpress.org/plugins/browse/popular/{}"
def main(url, num):
with requests.Session() as req:
print(f"Collecting Page# {num}")
r = req.get(url.format(num))
soup = BeautifulSoup(r.content, 'html.parser')
link = [item.get("href")
for item in soup.findAll("a", rel="bookmark")]
return set(link)
with ThreadPoolExecutor(max_workers=20) as executor:
futures = [executor.submit(main, url, num)
for num in [""]+[f"page/{x}/" for x in range(2, 50)]]
allin = []
for future in futures:
allin.extend(future.result())
def parser(url):
with requests.Session() as req:
print(f"Extracting {url}")
r = req.get(url)
soup = BeautifulSoup(r.content, 'html.parser')
target = [item.get_text(strip=True, separator=" ") for item in soup.find(
"h3", class_="screen-reader-text").find_next("ul").findAll("li")[:8]]
head = [soup.find("h1", class_="plugin-title").text]
new = [x for x in target if x.startswith(
("V", "Las", "Ac", "W", "T", "P"))]
return head + new
with ThreadPoolExecutor(max_workers=50) as executor1:
futures1 = [executor1.submit(parser, url) for url in allin]
for future in futures1:
print(future.result())
see the results:
Extracting https://wordpress.org/plugins/tuxedo-big-file-uploads/Extracting https://wordpress.org/plugins/cherry-sidebars/
Extracting https://wordpress.org/plugins/meks-smart-author-widget/
Extracting https://wordpress.org/plugins/wp-limit-login-attempts/
Extracting https://wordpress.org/plugins/automatic-translator-addon-for-loco-translate/
Extracting https://wordpress.org/plugins/event-organiser/
Traceback (most recent call last):
File "/home/martin/unbenannt0.py", line 45, in <module>
print(future.result())
File "/home/martin/anaconda3/lib/python3.7/concurrent/futures/_base.py", line 428, in result
return self.__get_result()
File "/home/martin/anaconda3/lib/python3.7/concurrent/futures/_base.py", line 384, in __get_result
raise self._exception
File "/home/martin/anaconda3/lib/python3.7/concurrent/futures/thread.py", line 57, in run
result = self.fn(*self.args, **self.kwargs)
File "/home/martin/unbenannt0.py", line 34, in parser
"h3", class_="screen-reader-text").find_next("ul").findAll("li")[:8]]
AttributeError: 'NoneType' object has no attribute 'find_next'
well i have a severe error - the
AttributeError: 'NoneType' object has no attribute 'find_next'
It looks like soup.find("h3", class_="screen-reader-text") has not found anything.
Well we could either break this line up and only call find_next if there was a result or use a try/except that captures the AttributeError.
at the moment i do not know how to fix this whole thing - only that we can surround the offending code with:
try:
code that causes error
except AttributeError:
print(f"Attribution error on {some data here}, {whatever else would be of value}, {...}")
... whatever action is thinkable to take here.
btw.- besides this error i want to add a option that gives the results back: see complete and unaltered error traceback. It contains valuable process call stack information.
Extracting https://wordpress.org/plugins/automatic-translator-addon-for-loco-translate/
Extracting https://wordpress.org/plugins/wpforo/Extracting https://wordpress.org/plugins/accesspress-social-share/
Extracting https://wordpress.org/plugins/mailoptin/
Extracting https://wordpress.org/plugins/tuxedo-big-file-uploads/
Extracting https://wordpress.org/plugins/post-snippets/
Extracting https://wordpress.org/plugins/woocommerce-payfast-gateway/Extracting https://wordpress.org/plugins/woocommerce-grid-list-toggle/
Extracting https://wordpress.org/plugins/goodbye-captcha/
Extracting https://wordpress.org/plugins/gravity-forms-google-analytics-event-tracking/
Traceback (most recent call last):
File "/home/martin/dev/wordpress_plugin.py", line 44, in <module>
print(future.result())
File "/home/martin/anaconda3/lib/python3.7/concurrent/futures/_base.py", line 428, in result
return self.__get_result()
File "/home/martin/anaconda3/lib/python3.7/concurrent/futures/_base.py", line 384, in __get_result
raise self._exception
File "/home/martin/anaconda3/lib/python3.7/concurrent/futures/thread.py", line 57, in run
result = self.fn(*self.args, **self.kwargs)
File "/home/martin/dev/wordpress_plugin.py", line 33, in parser
"h3", class_="screen-reader-text").find_next("ul").findAll("li")[:8]]
AttributeError: 'NoneType' object has no attribute 'find_next'
hope that this was not too long and complex - thank you for the help!