code: def __len__(self):
      return self.data.size(0) // self.seq_len
  
imports: import argparse
  import gzip
  from contextlib import nullcontext
  from functools import partial
  from time import time
  import numpy
  import torch
  import torch.nn
  import torch.optim
  import tqdm
  from palm_pytorch import PaLM
  from palm_pytorch.autoregressive_wrapper import AutoregressiveWrapper
  from torch.utils.data import DataLoader, Dataset
  import colossalai
  from colossalai.booster import Booster
  from colossalai.booster.plugin import GeminiPlugin, LowLevelZeroPlugin, TorchDDPPlugin
  from colossalai.lazy import LazyInitContext
  from colossalai.logging import disable_existing_loggers, get_dist_logger
  from colossalai.nn import HybridAdam
  from colossalai.utils import get_current_device
label_desc: Use image node_id 3 for calling the TextSamplerDataset obj's underlying member method code with example usage: obj.__len__() and returns: unknown