code: def from_url(reddit_session, url, comment_limit=0, comment_sort=None,
                   comments_only=False, params=None):
          if params is None:
              params = {}
          parsed = urlparse(url)
          query_pairs = parse_qs(parsed.query)
          get_params = dict((k, ",".join(v)) for k, v in query_pairs.items())
          params.update(get_params)
          url = urlunparse(parsed[:3] + ("", "", ""))
          if comment_limit is None:
              params['limit'] = 2048
          elif comment_limit > 0:
              params['limit'] = comment_limit
          if comment_sort:
              params['sort'] = comment_sort
          response = reddit_session.request_json(url, params=params)
          if comments_only:
              return response[1]['data']['children']
          submission = Submission.from_json(response)
          submission._comment_sort = comment_sort
          submission._params = params
          return submission