code: def __len__(self):
      return len(self.examples)
  
imports: import re
  import html
  import logging
  import pandas
  import os
  import random
  import torch
  from pathlib import Path
  import pickle
  import shutil
  import itertools
  import more_itertools
  from sklearn.model_selection import train_test_split
  from torch.utils.data import TensorDataset, DataLoader, RandomSampler, SequentialSampler, Dataset
  from torch.utils.data.distributed import DistributedSampler
  import spacy
  from tqdm import tqdm, trange
  from fastprogress.fastprogress import master_bar, progress_bar
  from transformers import WEIGHTS_NAME, BertConfig, BertForSequenceClassification, BertTokenizer, XLMConfig, XLMForSequenceClassification, XLMTokenizer, XLNetConfig, XLNetForSequenceClassification, XLNetTokenizer, RobertaConfig, RobertaForSequenceClassification, RobertaTokenizer, DistilBertConfig, DistilBertForSequenceClassification, DistilBertTokenizer, CamembertConfig, CamembertForSequenceClassification, CamembertTokenizer, ElectraConfig, ElectraForSequenceClassification, ElectraTokenizer
label_desc: Use image node_id 2 for calling the TextDataset obj's underlying member method code with example usage: obj.__len__() and returns: len