code: def chunk(it, size):
      it = iter(it)
      return iter(lambda: tuple(islice(it, size)), ())
  
imports: import argparse
  import os
  from contextlib import nullcontext
  from itertools import islice
  import numpy
  import PIL
  import torch
  from einops import rearrange, repeat
  from omegaconf import OmegaConf
  from PIL import Image
  from torch import autocast
  from torchvision.utils import make_grid
  from tqdm import tqdm, trange
  from imwatermark import WatermarkEncoder
  from ldm.models.diffusion.ddim import DDIMSampler
  from ldm.util import instantiate_from_config
  from scripts.txt2img import put_watermark
  from utils import replace_module
label_desc: Use image node_id 1 for calling a global function with example usage: chunk(it, size) and returns: iter