Repository: yt-dlp/yt-dlp
File: yt_dlp/extractor/theguardian.py (Python)

Code before:
import functools

from .common import InfoExtractor
from ..utils import (
    OnDemandPagedList,
    extract_attributes,
    get_element_by_class,
    get_element_html_by_class,
    get_elements_html_by_class,
    traverse_obj,
    unified_strdate,
    urljoin
)


class TheGuardianPodcastIE(InfoExtractor):
    _VALID_URL = r'https?://(?:www\.)?theguardian\.com/\w+/audio/\d{4}/\w{3}/\d{1,2}/(?P<id>[\w-]+)(?:$|[?#])'
    _TESTS = [{
        'url': 'https://www.theguardian.com/news/audio/2023/nov/03/we-are-just-getting-started-the-plastic-eating-bacteria-that-could-change-the-world-podcast',
        'md5': 'd1771744681789b4cd7da2a08e487702',
        'info_dict': {
            'id': 'we-are-just-getting-started-the-plastic-eating-bacteria-that-could-change-the-world-podcast',
            'ext': 'mp3',
            'title': '‘We are just getting started’: the plastic-eating bacteria that could change the world – podcast',
            'description': 'When a microbe was found munching on a plastic bottle in a rubbish dump, it promised a recycling revolution. Now scientists are attempting to turbocharge those powers in a bid to solve our waste crisis. But will it work?',
            'creator': 'Stephen Buranyi',
            'thumbnail': 'md5:73c12558fcb3b0e2a59422bfb33b3f79',
            'release_date': '20231103'
        }
    }, {
        'url': 'https://www.theguardian.com/news/audio/2023/oct/30/the-trials-of-robert-habeck-is-the-worlds-most-powerful-green-politician-doomed-to-fail-podcast',
        'md5': 'd1771744681789b4cd7da2a08e487702',
        'info_dict': {
            'id': 'the-trials-of-robert-habeck-is-the-worlds-most-powerful-green-politician-doomed-to-fail-podcast',
            'ext': 'mp3',
            'title': 'The trials of Robert Habeck: is the world’s most powerful green politician doomed to fail? – podcast',
            'description': 'A year ago, Germany’s vice-chancellor was one of the country’s best-liked public figures. Then came the tabloid-driven backlash. Now he has to win the argument all over again',
            'creator': 'Philip Oltermann',
            'thumbnail': 'md5:6e5c5ec43843e956e20be793722e9080',
            'release_date': '20231030'
        }
    }, {

Review comment (refactor):
Is the last non-capturing group necessary here?

Typically we use something like this when we are trying to prevent a playlist extractor's regex from matching an episode extractor's URLs, e.g. when the playlist URL is `www.example.com/season-1` and the episode URL is `www.example.com/season-1/episode-1`

Is it protecting against something here that I'm not seeing?
```suggestion
    _VALID_URL = r'https?://(?:www\.)?theguardian\.com/\w+/audio/\d{4}/\w{3}/\d{1,2}/(?P<id>[\w-]+)'
```

Code after:
import itertools

from .common import InfoExtractor
from ..utils import (
    clean_html,
    extract_attributes,
    get_element_by_class,
    get_element_html_by_class,
    get_elements_html_by_class,
    parse_qs,
    traverse_obj,
    unified_strdate,
    urljoin
)


class TheGuardianPodcastIE(InfoExtractor):
    _VALID_URL = r'https?://(?:www\.)?theguardian\.com/\w+/audio/\d{4}/\w{3}/\d{1,2}/(?P<id>[\w-]+)'
    _TESTS = [{
        'url': 'https://www.theguardian.com/news/audio/2023/nov/03/we-are-just-getting-started-the-plastic-eating-bacteria-that-could-change-the-world-podcast',
        'md5': 'd1771744681789b4cd7da2a08e487702',
        'info_dict': {
            'id': 'we-are-just-getting-started-the-plastic-eating-bacteria-that-could-change-the-world-podcast',
            'ext': 'mp3',
            'title': '‘We are just getting started’: the plastic-eating bacteria that could change the world – podcast',
            'description': 'md5:cfd3df2791d394d2ab62cd571d5207ee',
            'creator': 'Stephen Buranyi',
            'thumbnail': 'md5:73c12558fcb3b0e2a59422bfb33b3f79',
            'release_date': '20231103'
        }
    }, {
        'url': 'https://www.theguardian.com/news/audio/2023/oct/30/the-trials-of-robert-habeck-is-the-worlds-most-powerful-green-politician-doomed-to-fail-podcast',
        'md5': 'd1771744681789b4cd7da2a08e487702',
        'info_dict': {
            'id': 'the-trials-of-robert-habeck-is-the-worlds-most-powerful-green-politician-doomed-to-fail-podcast',
            'ext': 'mp3',
            'title': 'The trials of Robert Habeck: is the world’s most powerful green politician doomed to fail? – podcast',
            'description': 'md5:1b5cf6582d1771c6b7077784b5456994',
            'creator': 'Philip Oltermann',
            'thumbnail': 'md5:6e5c5ec43843e956e20be793722e9080',
            'release_date': '20231030'
        }