code: def print_ob(self, ob):
      ob_str = ""
      for i, action in enumerate(ACTIONS):
          if ob[i] >= 0:
              ob_str += " SEE GHOST {},".format(ACTION_DICT[action])
      for i, action in enumerate(ACTIONS):
          if ob[i + len(ACTIONS)] == 1:
              ob_str += " FEEL WALL {},".format(ACTION_DICT[action])
      if ob[-2]:
          ob_str += " HEAR GHOST,"
      if ob[-1]:
          ob_str += " SMELL FOOD,"
      return ob_str
  
imports: import logging
  from typing import NamedTuple
  import numpy
  from gym import Env
  from gym.spaces import Box, Discrete
label_desc: Use image node_id 20 for calling the PocManEnv obj's underlying member method code with example usage: obj.print_ob(ob) and returns: ob_str