text: import uuid
  from chatterbot.queues import ResponseQueue
  
  
  class Session(object):
      """
      A single chat session.
      """
  
      def __init__(self):
          # A unique identifier for the chat session
          self.uuid = uuid.uuid1()
          self.id_string = str(self.uuid)
          self.id = str(self.uuid)
  
          # The last 10 statement inputs and outputs
          self.conversation = ResponseQueue(maxsize=10)
  
  
  class ConversationSessionManager(object):
      """
      Object to hold and manage multiple chat sessions.
      """
  
      def __init__(self):
          self.sessions = {}
  
      def new(self):
          """
          Add a new chat session.
          """
          session = Session()
  
          self.sessions[session.id_string] = session
  
          return session
  
      def get(self, session_id, default=None):
          """
          Return a session given a unique identifier.
          """
          return self.sessions.get(str(session_id), default)
  
      def update(self, session_id, conversance):
          """
          Add a conversance to a given session if the session exists.
          """
          session_id = str(session_id)
          if session_id in self.sessions:
              self.sessions[session_id].conversation.append(conversance)
  