old_contents: #!/usr/bin/env python
  import requests
  HTTP POST message to cloud platform
  
new_contents: #!/usr/bin/env python
  import requests
  HTTP POST message to cloud platform
  #Most times gateway communicate with cloud via MQTT(hbmqtt framework),  
  #in some special time, it need to use HTTP(requests framework) to POST message to cloud.
  
subject: Update post.py