code: def __len__(self) -> int:
      num_take = self.num_take // self.world_size
      if isinstance(self.source_datapipe, Sized):
          if len(self.source_datapipe) < num_take:
              num_take = len(self.source_datapipe)
      # TODO: might be weird to not take `num_workers` into account
      return num_take
  
imports: import csv
  import functools
  import pathlib
  import pickle
  from typing import Any, BinaryIO, Callable, Dict, IO, Iterator, List, Sequence, Sized, Tuple, TypeVar, Union
  import torch
  import torch.distributed
  import torch.utils.data
  from torchdata.datapipes.iter import IoPathFileLister, IoPathFileOpener, IterDataPipe, ShardingFilter, Shuffler
  from torchvision.prototype.utils._internal import fromfile
label_desc: Use image node_id 3 for calling the TakerDataPipe obj's underlying member method code with example usage: obj.__len__() and returns: num_take