code: def __init__(self, max_size, small_batch_size):
      self.dataset = []
      self.max_size = max_size
      self.small_batch_size = small_batch_size
  
imports: import torch
  from torch.utils.data import Dataset, Subset, ConcatDataset
  from torch.nn.utils.rnn import pad_sequence
  import torch.nn.functional
  from datasets import load_dataset
  import numpy
  import os
  import hashlib
  from itertools import chain
  from dschat.utils.data import raw_datasets
  from deepspeed.accelerator import get_accelerator
label_desc: Use image node_id 1 to create a new MiniDataset object  with example: obj = MiniDataset(max_size, small_batch_size)