code: def param_fetch_one(self, name):
          '''initiate fetch of one parameter'''
          try:
              idx = int(name)
              self.mav.param_request_read_send(self.target_system, self.target_component, "", idx)
          except Exception:
              self.mav.param_request_read_send(self.target_system, self.target_component, name, -1f param_fetch_one(self, name):
          '''initiate fetch of one parameter'''
          try:
              idx = int(name)
              self.mav.param_request_read_send(self.target_system, self.target_component, "", idx)
          except Exception:
              self.mav.param_request_read_send(self.target_system, self.target_component, name, -1)
docs: initiate fetch of one parameter