runtimes-python/get_versions.py at master · DMOJ/runtimes-python · GitHub

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import re
from collections import defaultdict

import requests
from bs4 import BeautifulSoup

reversion = re.compile(r'\d+\.\d+(?:\.\d+)?/$')


def main():
    downloads = requests.get('https://www.python.org/downloads/')
    downloads.raise_for_status()

    wanted = []
    soup = BeautifulSoup(downloads.content, 'html.parser')
    version_rows = soup.find('div', class_='active-release-list-widget').find('ol', class_='list-row-container')
    for row in version_rows.find_all('li'):
        branch = row.find('span', class_='release-version').text
        status = row.find('span', class_='release-status').text
        if status in ('bugfix', 'security'):
            wanted.append(tuple(map(int, branch.split('.'))))

    ftp = requests.get('https://www.python.org/ftp/python/')
    ftp.raise_for_status()

    soup = BeautifulSoup(ftp.content, 'html.parser')

    releases = defaultdict(list)
    for version in soup.find_all('a'):
        href = version['href']
        if reversion.match(href):
            release = tuple(map(int, href.rstrip('/').split('.')))
            branch = (release[0], release[1])
            if branch in wanted:
                releases[branch].append(release)

    for branch, versions in sorted(releases.items()):
        for release in sorted(versions, reverse=True):
            release = '.'.join(map(str, release))

            check = requests.head(f'https://www.python.org/ftp/python/{release}/Python-{release}.tar.xz')
            if check.status_code == 404:
                continue

            check.raise_for_status()
            print(release)
            break
        else:
            continue


if __name__ == '__main__':
    main()