class_docstr: ### CelebA HQ dataset
class_docstr_tok: ["#","#","#","CelebA","HQ","dataset"]
docstr: Size of the dataset
docstr_tok: ["Size","of","the","dataset"]
code: def __len__(self):
      """
      Size of the dataset
      """
      return len(self._files)
  
imports: from typing import List
  import torch
  import torch.utils.data
  import torchvision
  from PIL import Image
  from labml import lab, tracker, experiment, monit
  from labml.configs import BaseConfigs, option
  from labml_helpers.device import DeviceConfigs
  from labml_nn.diffusion.ddpm import DenoiseDiffusion
  from labml_nn.diffusion.ddpm.unet import UNet
label_desc: Use image node_id 2 for calling the CelebADataset obj's underlying member method code with example usage: obj.__len__() and returns: len