has a topic been discussed on python bytes?

discussed.py

# caches python bytes podcast links to a file and searches links on first cli
# arg string (case insensitive)
import os
import re
import sys
import time

import feedparser
from cfonts import render, say

say('Discussed at Python Bytes?', font='chrome', size=(122, 32))

RSS = 'https://pythonbytes.fm/episodes/rss'
CACHE = 'links.out'
ONE_DAY = 24*60*60
A_HREF = re.compile(r'^<a href="([^"]+)">(?:<strong>)?(.*?)(?:</strong>)?</a>$')  # noqa E 501


def _expired_cache():
    return (time.time() - os.stat(CACHE).st_mtime) > ONE_DAY


def cache_feed():
    if os.path.isfile(CACHE) and not _expired_cache():
        return

    data = feedparser.parse(RSS)

    output = []
    for entry in data['entries']:
        episode = entry['itunes_episode']
        date = entry['published']
        summary = entry['summary']
        links = re.findall(r'<a.*?</a>', summary)

        for url in links:
            m = A_HREF.match(url)
            if m:
                url, title = m.groups()
            else:
                title = ''

            output.append(f'{episode:<4} | {date} | {title} | {url}')

    with open(CACHE, 'w') as f:
        f.write('\n'.join(output))


def ireplace(old, new, text):
    """https://stackoverflow.com/a/4759732"""
    index_l = text.lower().index(old.lower())
    return text[:index_l] + new + text[index_l + len(old):]


def search_episode_links(grep):
    """searches through href and names"""
    grep = grep.lower()

    with open(CACHE) as f:
        matching_lines = [line.strip() for line in f.readlines()
                          if grep in line]
        if matching_lines:
            for line in matching_lines:
                match_out = render(grep.upper(), font="console",
                                   colors=['candy'], space=False)
                print(ireplace(grep, match_out, line))
        else:
            print(f'No matches for "{grep}"')


if __name__ == '__main__':
    if len(sys.argv) < 2:
        print(f'Usage: {sys.argv[0]} search-term')
        sys.exit(1)

    cache_feed()

    grep = sys.argv[1]
    search_episode_links(grep)