code: def __repr__(self):
      return f"LawPromptsDataset(data_file={self.data_file}, prompts_len={len(self.prompts)})"
  
imports: import copy
  import json
  from typing import Dict, Sequence
  import torch
  from torch.utils.data import Dataset
  from tqdm import tqdm
  from transformers import AutoTokenizer
label_desc: Use image node_id 4 for calling the EasyPromptsDataset obj's underlying member method code with example usage: obj.__repr__() and returns: str, self, str, len, str