1  """Various exceptions used."""
 2  
 3  
 4  class ItemNotFoundError(Exception):
 5      pass
 6  
 7  
 8  class ItemDeleteError(Exception):
 9      pass
10  
11  
12  class ItemCreateError(Exception):
13      pass
14  
15  
16  class SpoolMeasureError(Exception):
17      pass