class_docstr: Tracker module for PS
class_docstr_tok: ["Tracker","module","for","PS"]
code: def alive(self):
      if self.cmd is not None:
          return self.thread.isAlive()
      else:
          return False
  
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 4 for calling the PSTracker obj's underlying member method code with example usage: obj.alive() and returns: self, False