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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def __exitfunction(self):
        '''
        Method called by exit hook, ensures that both an exit code and
        output is supplied, also catches errors.
        '''
        if self._hook.exit_code is None and self._hook.exception is None:
            print("Check did not exit! You should call an exit code method.")
            sys.stdout.flush()
            os._exit(1)
        elif self._hook.exception:
            print("Check failed to run: %s, %s" %
                  (sys.last_type, traceback.format_tb(sys.last_traceback)))
            sys.stdout.flush()
            os._exit(2)