class_docstr: Logs actions/observations in a world and saves in a given format.
class_docstr_tok: ["Logs","actions\/observations","in","a","world","and","saves","in","a","given","format","."]
docstr: Add episode to the logs.
docstr_tok: ["Add","episode","to","the","logs","."]
code: def _add_episode(self, episode):
      """
      Add episode to the logs.
      """
      self._logs.append(episode)
  
imports: from typing import Optional
  from parlai.core.params import ParlaiParser
  from parlai.core.opt import Opt
  from parlai.core.worlds import BatchWorld, DynamicBatchWorld
  from parlai.utils.misc import msg_to_str
  from parlai.utils.conversations import Conversations
  from parlai.utils.io import PathManager
  import parlai.utils.logging
  from parlai.core.message import Message
  import copy
  from tqdm import tqdm
label_desc: Use image node_id 7 for calling the WorldLogger obj's underlying member method code with example usage: obj._add_episode(episode) without return types