code: def tar_runner(self):
          
          script_bytes = self.RUNNER.read_bytes()
  
          tarstream = BytesIO()
          tar = tarfile.TarFile(fileobj=tarstream, mode='w')
  
          tarinfo = tarfile.TarInfo(name="runner.py")
          tarinfo.size = len(script_bytes)
          tarinfo.mtime = int(time.time())
  
          tar.addfile(tarinfo, BytesIO(script_bytes))
          tar.close()
  
          return tarstream.getvalue()
docs: Returns a tar with the runner script.