old_contents: # -*- coding: utf-8 -*-
  
  
  class TileExtractionException(Exception):
      """
      Thrown when a tile is requested but cannot be fetched
      """
      pass
  
  
  class ImageExtractionException(Exception):
      """
      Thrown when an image is requested cannot be extracted
      """
      pass
  
new_contents: # -*- coding: utf-8 -*-
  
  __author__ = "Romain Mormont <romainmormont@hotmail.com>"
  __version__ = "0.1"
  
  
  class TileExtractionException(Exception):
      """Thrown when a tile is requested but cannot be fetched"""
      pass
  
  
  class ImageExtractionException(Exception):
      """Thrown when an image is requested cannot be extracted"""
      pass
  
subject: update errors.py doc