code: def __init__(self, *options):
      self.options = options
  
imports: import numpy
  import unittest
  from chainer.dataset import DatasetMixin
  from chainercv.utils import assert_is_instance_segmentation_dataset
  from chainercv.utils import testing
label_desc: Use image node_id 1 to create a new InstanceSegmentationDataset object from inherited base classes: DatasetMixin with example: obj = InstanceSegmentationDataset()