new_contents: 
  from isaw.awib.conversions import make_master
  import logging
  from os import listdir
  from os.path import dirname, isfile, join, realpath
  from PIL import Image
  
  
  def test_pillow_formats():
      logger = logging.getLogger()
      logger.setLevel(logging.DEBUG)
      data_dir = join(dirname(realpath(__file__)), 'data')
      file_list = [fn for fn in listdir(data_dir) if isfile(join(data_dir, fn))]
      logger.debug('len(file_list): {}'.format(len(file_list)))
      for fn in file_list:
          logger.debug('filename: "{}"'.format(fn))
          im = Image.open(join(data_dir, fn))
  
  
subject: test that PIL (Pillow) can open all our common file formats