def cleanup(self):
        """Clean up, making sure the process is stopped before we pack up and go home."""
        if self.process is None:  # Process wasn't running yet, so nothing to worry about
            return
        if self.process.poll() is None:
            log.info("Sending TERM to %d", self.process.pid)
            self.process.terminate()
            # Give process a second to terminate, if it didn't, kill it.
            start = time.clock()
            while time.clock() - start < 1.0:
                time.sleep(0.05)
                if self.process.poll() is not None:
                    break
            else:
                log.info("Sending KILL to %d", self.process.pid)
                self.process.kill()
        assert self.process.poll() is not None
Clean up, making sure the process is stopped before we pack up and go home.