class_docstr: Tracker module for PS
class_docstr_tok: ["Tracker","module","for","PS"]
code: def join(self):
      if self.cmd is not None:
          while self.thread.isAlive():
              self.thread.join(100)
  
imports: from __future__ import absolute_import
  import os
  import sys
  import socket
  import struct
  import subprocess
  import argparse
  import time
  import logging
  from threading import Thread
label_desc: Use image node_id 2 for calling the PSTracker obj's underlying member method code with example usage: obj.join() without return types