text: # Copyright 2016 The Streamer Authors. All Rights Reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  class Stream:
  
    def __init__(self, producer):
      self.producer = producer
  
    def connect(self):
      """
      Connect the stream with the zmq topic
      """
  
    def pop_frame(self):
      """
      Pop a frame from the stream.
      :return: A frame in the front of the stream queue.
      """
      pass
  
    def push_stream(self):
      """
      Push a frame into the stream.
      :return:
      """
      # TODO: need more design on this.
      pass
  