class_docstr: Do NOT use this directly, use its children.
class_docstr_tok: ["Do","NOT","use","this","directly",",","use","its","children","."]
code: def get_fold_chunks(self, opt):
      datatype = get_dtype(opt)
      if "test" == datatype:
          s = 0
          e = s + NUM_TEST_CHUNKS
      elif "valid" == datatype:
          s = NUM_TEST_CHUNKS
          e = s + NUM_VALID_CHUNKS
      elif "train" == datatype:
          s = NUM_TEST_CHUNKS + NUM_VALID_CHUNKS
          e = s + NUM_TRAIN_CHUNKS
  
      return list(range(s, e))
  
imports: import os
  import json
  from copy import deepcopy
  from parlai.core.message import Message
  from parlai.utils.data import DatatypeHelper
  from parlai.core.teachers import ChunkTeacher
  from .build import build
label_desc: Use image node_id 5 for calling the BaseBB3DataTeacher obj's underlying member method code with example usage: obj.get_fold_chunks(opt) and returns: list