code: def cluster():
      data = CLUSTER_MONITOR.get_data()
      return jsonify(data)
  
file_path: PARL/parl/remote/monitor.py
imports: import argparse
  import pickle
  import random
  import time
  import zmq
  import threading
  from flask import Flask, render_template, jsonify, request
label_desc: Use image node_id 3 for calling a global function with example usage: cluster() and returns: jsonify