new_contents: #!/usr/bin/env python
  
  import sys,exifread
  
  def main():
  	if len(sys.argv) != 2:
  		print("Usage: %s <JPG>" % sys.argv[0])
  		sys.exit(1)
  	JPG = sys.argv[1]
  	jpgfh = open(JPG, 'rb')
  	tags = exifread.process_file(jpgfh)
  	dttag = 'EXIF DateTimeOriginal'
  	dtsubtag = 'EXIF SubSecTimeOriginal'
  	if dttag in tags:
  		print(tags[dttag])
  	if dtsubtag in tags:
  		print(tags[dtsubtag])
  	jpgfh.close()
  
  if __name__ == '__main__':
  	main()
  
subject: Add a EXIF extract utility. Later the EXIF "EXIF DateTimeOriginal" and "EXIF SubsecTimeOriginal" will be used to identify the same pic by taken time and subsec.