new_contents: import requests
  
  r = requests.get("https://stepic.org/api/leaders")
  
  print "Current leaders:\n"
  
  for leader in r.json()["leaders"]:
      user = requests.get("https://stepic.org/api/users/" + str(leader["user"])).json()["users"][0]
      print leader["score"], '\t', user['first_name'], user['last_name']
subject: Add a new example, showing the list of leaders