[extractor/dropout] Dropout season pagination

[OverlordQ]

IMPORTANT: PRs without the template will be CLOSED

Description of your pull request and other information

Handles pagination for seasons with more than 24 episodes. Also fixes test cases with accurate episode counts for seasons.

Template

Before submitting a pull request make sure you have:

• At least skimmed through contributing guidelines including yt-dlp coding conventions
• Searched the bugtracker for similar pull requests
• Checked the code with flake8 and ran relevant tests

In order to be accepted and merged into yt-dlp each piece of code must be in public domain or released under Unlicense. Check all of the following options that apply:

• I am the original author of this code and I am willing to release it under Unlicense
• I am not the original author of this code but it is in public domain or released under Unlicense (provide reliable evidence)

What is the purpose of your pull request?

• Fix or improvement to an extractor (Make sure to add/update tests)
• New extractor (Piracy websites will not be accepted)
• Core bug fix/improvement
• New feature (It is strongly recommended to open an issue first)

Copilot Summary

🤖 Generated by Copilot at b7d9739

Summary

📄🔗🧪

Improved the DropoutSeasonIE extractor to handle multiple pages of episodes. Updated the tests and the yt_dlp/extractor/dropout.py file accordingly.

We're scraping the web for some videos to see
We use DropoutSeasonIE
But the pages are many and we need to fetch more
So we add pagination with get_element_by_attribute

Walkthrough

• Import get_element_by_attribute function from utils.py to use for pagination (link)
• Update playlist_count for DropoutSeasonIE extractor test cases to reflect current number of episodes for "Dimension 20: Fantasy High" (link, link)
• Add new test case for DropoutSeasonIE extractor to cover multi-season series with pagination, such as "Breaking News No Laugh Newsroom" (link)
• Initialize page_num variable to 1 in _real_extract method of DropoutSeasonIE extractor to keep track of current page number (link)
• Add pagination logic to _real_extract method of DropoutSeasonIE extractor using get_element_by_attribute, get_elements_by_class, and url_result functions to download and extract all episodes of a paginated series (link)

[pukkandan]

Try to return a PagedList instead, or atleast a generator.

[OverlordQ]

Second pass. The try/except seems hacky but only way I saw to not barf when len(page 1) == page_max

[OverlordQ]

Changes made, but still the nested exception issue. Is passing expected_status=400 to _download_webpage the expected way to handle this case?

[bashonly]

My bad, I was wrong. yt-dlp will catch the error and continue with playlist extraction, but the extractor & tests do fail. Let's do this then:

Suggested change

	webpage = self._download_webpage(
	f'{url}?page={page}', season_id, note=f'Downloading page {page}')
	webpage = self._download_webpage(
	f'{url}?page={page}', season_id, note=f'Downloading page {page}', expected_status=400)