code: def __init__(self, length, index_only=True):
      self.len = length
      self.index_only = index_only
  
file_path: MONAI/tests/test_zipdataset.py
imports: from __future__ import annotations
  import unittest
  import torch
  from parameterized import parameterized
  from monai.data import ZipDataset
label_desc: Use image node_id 1 to create a new Dataset_ object from inherited base classes: torch.utils.data with example: obj = Dataset_(length, index_only)