(self, start_time=None, end_time=None)
return self.data_service.get_line(start_time, end_time)
get raw data
        :param start_time:
        :param end_time:
        :return: [(timestamp, value, label)]
get raw data
        :param start_time:
        :param end_time:
        :return: [(timestamp, value, label)]
get raw data : param start_time : : param end_time : : return : [ ( timestamp value label ) ]
def get_data(self, start_time=None, end_time=None):
        """
        get raw data
        :param start_time:
        :param end_time:
        :return: [(timestamp, value, label)]
        """
        return self.data_service.get_line(start_time, end_time)
def get_data ( self , start_time = None , end_time = None ) : return self . data_service . get_line ( start_time , end_time )