import re

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 = {}

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:

if branch in releases:

releases[branch] = max(releases[branch], release)

else:

releases[branch] = release

for _, release in sorted(releases.items()):

print('.'.join(map(str, release)))

if __name__ == '__main__':

main()