code: def _json_body_(cls):
          
          json = []
          for series_name, data in six.iteritems(cls._datapoints):
              for point in data:
                  json_point = {
                      "measurement": series_name,
                      "fields": {},
                      "tags": {},
                      "time": getattr(point, "time")
                  }
  
                  for field in cls._fields:
                      value = getattr(point, field)
                      if value is not None:
                          json_point['fields'][field] = value
  
                  for tag in cls._tags:
                      json_point['tags'][tag] = getattr(point, tag)
  
                  json.append(json_point)
          return json
docs: Return the JSON body of given datapoints.
  
          :return: JSON body of these datapoints.