docs: def get_gae_versions():
      """Gets a list of all of the available Python SDK versions, sorted with
      the newest last."""
      r = requests.get(SDK_RELEASES_URL)
      r.raise_for_status()
  
      releases = r.json().get('items', {})
  
      # We only care about the Python releases, which all are in the format
      # "featured/google_appengine_{version}.zip". We'll extract the version
      # number so we can sort the list by version, and finally get the download
      # URL.
      versions_and_urls = []
      for release in releases:
          match = PYTHON_RELEASE_RE.match(release['name'])
  
          if not match:
              continue
  
          versions_and_urls.append(
              ([int(x) for x in match.groups()], release['mediaLink']))
  
      return sorted(versions_and_urls, key=lambda x: x[0])