title: 'dict' object has no attribute 'append' Json
body: <p>I have this code that adds 50 points to a user in my json file but I keep getting a <code>'dict' object has no attribute 'append'</code> when trying to append new users to the users:</p>
  
  <pre><code>def updateUsers(chan):
      j = urllib2.urlopen('http://tmi.twitch.tv/group/user/' + chan + '/chatters')
      j_obj = json.load(j)
      with open('dat.dat', 'r') as data_file:
          data = json.load(data_file)
          for dat in data['users']:
              if dat in j_obj['chatters']['moderators'] or j_obj['chatters']['viewers']:
                  data['users']['tryhard_cupcake']['Points'] += 50
              else:
                  data['users'].append([dat]) # append doesn't work here
      with open('dat.dat', 'w') as out_file:
          json.dump(data, out_file)
  </code></pre>
  
  <p>What is the proper way of adding new objects/users to <code>users</code>?</p>