code: def go_to_ve():
      
      # two options are possible
      if not path.abspath(sys.prefix) == VE_ROOT:
          # Option A: we are in the parental process that was called from command line like
          # $> ./launch.py start PROCESS_NAME
          # in this case sys.prefix points to Global Interpreter
          python = get_python()
          retcode = subprocess.call([python, __file__] + sys.argv[1:])
          sys.exit(retcode)
      else:
          # Option B: we have already followed Option A and instantiated Virtual Environment command
          # This mean that sys.prefix points to Virtual Environment
          pass
docs: Rerun this script within the virtualenv with same args
          NOTICE: parent process will wait for created subprocess to complete