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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 _exit_handler(self):
 """ This function I register with atexit to run whenever the script is completing. A catch-all for uncaught exceptions, setting status flag file to failed. """


        # TODO: consider handling sys.stderr/sys.stdout exceptions related to
        # TODO (cont.): order of interpreter vs. subprocess shutdown signal receipt.
        # TODO (cont.): see https://bugs.python.org/issue11380


        # Make the cleanup file executable if it exists
        if os.path.isfile(self.cleanup_file):
            # Make the cleanup file self destruct.
            with open(self.cleanup_file, "a") as myfile:
                myfile.write("rm " + self.cleanup_file + "\n")
            os.chmod(self.cleanup_file, 0o755)

        # If the pipeline hasn't completed successfully, or already been marked
        # as failed, then mark it as failed now.

        if not self._has_exit_status:
            print("Pipeline status: {}".format(self.status))
            self.fail_pipeline(Exception("Pipeline failure. See details above."))

        if self.tee:
            self.tee.kill()