old_contents: import uuid
  import helpmio.event
  
  
  class ChatRoom:
  
      def __init__(self, asker_name):
          self._connected_users = dict()
          self._all_users = dict()
          self._chat_history = []
          self.on_connect = helpmio.event.EventDispatcher()
          self.on_disconnect = helpmio.event.EventDispatcher()
          self.on_chat = helpmio.event.EventDispatcher()
          self._asker_name = asker_name
  
      def connect(self, nickname):
          connection_id = str(uuid.uuid4())
          self._connected_users[connection_id] = nickname
          self._all_users[connection_id] = nickname
          self.on_connect(connection_id)
          return connection_id
  
      def disconnect(self, connection_id):
          del self._connected_users[connection_id]
          self.on_disconnect(connection_id)
  
      def add_chat(self, connection_id, text):
          chat = (connection_id, text)
          self._chat_history.append(chat)
          self.on_chat(chat)
  
      def get_user(self, connection_id):
          return self._all_users[connection_id]
  
      def get_connected_users(self):
          return dict(self._connected_users)
  
      def get_num_connected_users(self):
          return len(self._connected_users)
  
      def get_all_users(self):
          return dict(self._all_users)
  
      def get_chat_history(self):
          return self._chat_history[:]
  
      def get_asker_name(self):
          return self._asker_name
  
      def asker_is_connected(self):
          for nickname in self._connected_users.values():
              if nickname == self._asker_name:
                  return True
          return False
  
      def non_asker_is_connected(self):
          for nickname in self._connected_users.values():
              if nickname != self._asker_name:
                  return True
          return False
  
new_contents: import uuid
  import helpmio.event
  
  
  class ChatRoom:
  
      def __init__(self, asker_name):
          self._connected_users = dict()
          self._all_users = dict()
          self._chat_history = []
          self.on_connect = helpmio.event.EventDispatcher()
          self.on_disconnect = helpmio.event.EventDispatcher()
          self.on_chat = helpmio.event.EventDispatcher()
          self._asker_name = asker_name
  
      def connect(self, nickname):
          connection_id = str(uuid.uuid4())
          self._connected_users[connection_id] = nickname
          self._all_users[connection_id] = nickname
          self.on_connect(connection_id)
          return connection_id
  
      def disconnect(self, connection_id):
          del self._connected_users[connection_id]
          self.on_disconnect(connection_id)
  
      def add_chat(self, connection_id, text):
          chat = (connection_id, text)
          self._chat_history.append(chat)
          self.on_chat(chat)
  
      def get_user(self, connection_id):
          if connection_id in self._all_users:
              return self._all_users[connection_id]
          else:
              return None
  
      def get_connected_users(self):
          return dict(self._connected_users)
  
      def get_num_connected_users(self):
          return len(self._connected_users)
  
      def get_all_users(self):
          return dict(self._all_users)
  
      def get_chat_history(self):
          return self._chat_history[:]
  
      def get_asker_name(self):
          return self._asker_name
  
      def asker_is_connected(self):
          for nickname in self._connected_users.values():
              if nickname == self._asker_name:
                  return True
          return False
  
      def non_asker_is_connected(self):
          for nickname in self._connected_users.values():
              if nickname != self._asker_name:
                  return True
          return False
  
subject: fix thing