new_contents: """Small tool for scraping http://redditlist.com/"""
  
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  
  import sys
  
  from  bs4 import BeautifulSoup
  import requests
  
  
  # Only getting SFW subreddits.
  BASE = 'http://redditlist.com/sfw?page='
  
  
  def fetch_page(page_num):
      print('fetching page', page_num)
      url = BASE + str(page_num)
      return BeautifulSoup(requests.get(url).text, 'html.parser')
  
  
  def get_hot_list(soup):
      # First ".span4.listing" element gets the "Recent Activity" list.
      # The 2nd list is by subscribers, and the 3rd is by 24h growth.
      items = soup.select('#listing-parent .span4.listing')[0].select('.listing-item')
      return [i.get('data-target-subreddit') for i in items]
  
  
  def main():
      outfile = sys.argv[1]
      all_subs = []
      # There are actually only 34 pages of results at the moment, but redditlist.com
      # doesn't throw errors, it just serves empty pages.
      for i in xrange(40):
          i += 1
          p = fetch_page(i)
          hots = get_hot_list(p)
          print('got', len(hots))  # should be 125 per page, except the last
          all_subs.extend(hots)
      print('got', len(all_subs), 'total')
      with open(outfile, 'w') as f:
          f.write('\n'.join(all_subs))
      print('done')
  
  
  if __name__ == '__main__':
      main()
  
subject: Add script for getting top subreddits.