code: def _execute(self, workdir, with_mpirun=False, exec_args=None):
          
          qadapter = self.manager.qadapter
          if not with_mpirun: qadapter.name = None
          if self.verbose:
              print("Working in:", workdir)
  
          script = qadapter.get_script_str(
              job_name=self.name,
              launch_dir=workdir,
              executable=self.executable,
              qout_path="qout_file.path",
              qerr_path="qerr_file.path",
              stdin=self.stdin_fname,
              stdout=self.stdout_fname,
              stderr=self.stderr_fname,
              exec_args=exec_args
          )
  
          # Write the script.
          script_file = os.path.join(workdir, "run" + self.name + ".sh")
          with open(script_file, "w") as fh:
              fh.write(script)
              os.chmod(script_file, 0o740)
  
          qjob, process = qadapter.submit_to_queue(script_file)
          self.stdout_data, self.stderr_data = process.communicate()
          self.returncode = process.returncode
          #raise self.Error("%s returned %s\n cmd_str: %s" % (self, self.returncode, self.cmd_str))
  
          return self.returncode
docs: Execute the executable in a subprocess inside workdir.
  
          Some executables fail if we try to launch them with mpirun.
          Use with_mpirun=False to run the binary without it.