How to find items in multiple strings that match with items from a list

Question

Hi I am trying to make a filter for a piratebay movie rss feed, which filters out the movies I already acquired and keeps the ones I do not currently have. It will then later on download the torrent from the magnet link provided. The problem is I can't figure out how to filter out the movies I have from the ones I don't, as I am trying to filter a list from a string and do not know a way around it. Here is a run-able example, with the code I want to add in notes:

import feedparser
import ssl

if hasattr(ssl, '_create_unverified_context'):
    ssl._create_default_https_context = ssl._create_unverified_context
feed = feedparser.parse('https://thepiratebay.org/rss/top100/207')
feed_title = feed['feed']['title']
feed_entries = feed.entries
f = open("movies.txt", "r+")
fr = f.readlines()
print(fr)
for entry in feed.entries[:25]:
    el = entry.title.lower()
    # if fr in el:
        # remove_from_titles()
    # else:
    article_title = el
    article_link = entry.link
    print(article_title)
    print(article_link)

movies.txt file:

aquaman
spiderman

Answer 1

Can you try the following:

with open("movies.txt", "r+") as f:
    fr = f.readlines()
if article_title.lower() not in movies_list:
    print(article_title)
    # do your downloading stuff here

    # update your movies.txt file
    with open("movies.txt", "a") as f:
        f.write('\n' + 'article_title')

Answer 2

Try to use set instead of list. If feed set is A and file titles B then the tittles in A that are not in B is A.difference(B)