code: def run(self, x):
      cmd = (
          f"locust --master-host {self.host} --master-port {self.port}"
      )
      process = subprocess.Popen(cmd)
      process.wait()
  
file_path: pytorch-lightning/docs/source-app/levels/intermediate/level_2_scripts/organized_app_python.py
imports: import subprocess
  from lightning.app import LightningWork, LightningFlow, LightningApp, CloudCompute
label_desc: Use image node_id 1 for calling the LocustLoadTester obj's underlying member method code with example usage: obj.run(x) without return types