viirs sdr to geotiff with satpy

viirs.py

# -*- coding: utf-8 -*-
from satpy import find_files_and_readers, Scene
from datetime import datetime

BASEDIR='/home/leonidas/viirs'

my_files = find_files_and_readers(base_dir=BASEDIR,
                                  reader='viirs_sdr',
                                  start_time=datetime(2018, 8, 26, 18, 1, 0),
                                  end_time=datetime(2018, 9, 1, 18, 30, 0))

scene = Scene(filenames=my_files, reader='viirs_sdr')
scene.load(["DNB"]) #alternative method: scene.load([0.7])
scene.save_datasets(base_dir=BASEDIR,file_pattern='{name}_{start_time:%Y%m%d_%H%M%S}.tif', floating_point=True)