<s> class InvalidExternal ( Exception ) : <EOL> """<STR_LIT>""" <EOL> class ExternalFailure ( Exception ) : <EOL> """<STR_LIT>""" <EOL> def __init__ ( self , external , error ) : <EOL> self . external = external <EOL> self . error = error <EOL> def __str__ ( self ) : <EOL> return '<STR_LIT>' . format ( self . external , self . error ) </s>
