text: import tornado.web
  from handlers._BaseHandler import BaseHandler
  
  class IndexHandler(BaseHandler):
  
      @tornado.gen.coroutine
      def get(self):
          """
          @api {get} /       Request API information
          @apiName Version
          @apiGroup Info
  
          @apiSuccess {String}    version     AT verison info
          @apiSuccessExample {json} Success-Response:
              HTTP/1.1 200 OK
              {
                  "version": "v0.0.1"
              }
          """
          retval = {
              'version': 'v0.0.1'
          }
          self.write(retval)