def _report_no_chall_path():
 msg = 'Client with the currently selected authenticator does not support any combination of challenges that will satisfy the CA.'
 logger.fatal(msg)
 raise errors.AuthorizationError(msg)

def _report_no_chall_path ( ) : msg = 'Client with the currently selected authenticator does not support any combination of challenges that will satisfy the CA.' logger . fatal ( msg ) raise errors . AuthorizationError ( msg )
logs and raises an error that no satisfiable chall path exists .