code: def set_epoch(self, count):
      # TFDS and WDS need external epoch count for deterministic cross process shuffle
      if hasattr(self.reader, "set_epoch"):
          self.reader.set_epoch(count)
  
imports: import io
  import logging
  from typing import Optional
  import torch
  import torch.utils.data
  from PIL import Image
  from .readers import create_reader
label_desc: Use image node_id 4 for calling the IterableImageDataset obj's underlying member method code with example usage: obj.set_epoch(count) without return types