class_docstr: Abstract BPE Helper.
  
  BPE Helper subclasses must implement appropriate abstractmethods.
class_docstr_tok: ["Abstract","BPE","Helper",".","BPE","Helper","subclasses","must","implement","appropriate","abstractmethods","."]
docstr: Copy the codecs file to a new location.
  
  Default behavior is to do nothing.
  
  :param target_file:
      where to copy the codecs.
docstr_tok: ["Copy","the","codecs","file","to","a","new","location",".","Default","behavior","is","to","do","nothing",".",":","param","target_file",":","where","to","copy","the","codecs","."]
code: def copy_codecs_file(self, target_file: str):
      """
      Copy the codecs file to a new location.
  
      Default behavior is to do nothing.
  
      :param target_file:
          where to copy the codecs.
      """
      pass
  
imports: from parlai.core.params import ParlaiParser
  from abc import ABC, abstractmethod
  from functools import lru_cache
  import json
  import os
  import random
  import re
  from typing import Dict, List, Optional, Set, Tuple
  from typing_extensions import final
  from parlai.core.build_data import download, make_dir
  from parlai.core.opt import Opt
  from parlai.utils.misc import warn_once
  from parlai.utils.typing import TShared
  from parlai.utils.io import PathManager
  import parlai.utils.logging
label_desc: Use image node_id 11 for calling the BPEHelper obj's underlying member method code with example usage: obj.copy_codecs_file(target_file) without return types