class_docstr: analogous to fairseq.data.IndexedCachedDataset
code: def __del__(self):
      pass
  
imports: from typing import Any, Dict
  import numpy
  import torch
  from fairseq import data, tokenizer
  from fvcore.common.file_io import PathManager
  from pytorch_translate import vocab_constants
  from pytorch_translate.data.dictionary import TAGS
label_desc: Use image node_id 5 for calling the InMemoryNumpyWordCharDataset obj's underlying member method code with example usage: obj.__del__() without return types