It is How to use

1 Export tasks from Remeber the Milk
 1-1 get API Keys 
  https://www.rememberthemilk.com/services/api/keys.rtm
 1-2 execute command.
  ./rtm_fetch.py APIKEY SECRET

  It gets all tasks and save to "rtm.json".

2 Import tasks to Google Tasks.
 2-1 get OAuth2 API Keys
  https://code.google.com/apis/console/
  activte Tasks API
 2-2 execute command.
  ./google_push.py CLIENT_ID CLIENT_SECRET

  It import to all tasks to default task list.