title: output in ascending order
body: <p>Below is the code what I have used to read a folder having tiff images. How to have an ascending output(YR-M-D)?</p>
  <pre><code>import glob2
  dengue_files = glob2.glob('./dengue/*.tiff')
  dengue_files
  
  './dengue/image_2021-02-13.tiff',
   './dengue/image_2016-09-18.tiff',
   './dengue/image_2016-05-22.tiff',
   './dengue/image_2021-06-26.tiff',
   './dengue/image_2020-03-21.tiff',
   './dengue/image_2019-07-13.tiff',
   './dengue/image_2020-12-05.tiff',
   './dengue/image_2021-05-15.tiff',
   './dengue/image_2019-10-05.tiff',
   './dengue/image_2020-06-20.tiff',
   './dengue/image_2019-02-09.tiff'
  </code></pre>