class_docstr: Tests for rlu_dmlab_explore_object_rewards_many dataset.
class_docstr_tok: ["Tests","for","rlu_dmlab_explore_object_rewards_many","dataset","."]
code: def setUpClass(cls):
      dmlab_dataset.DMLabDatasetBuilder._INPUT_FILE_PREFIX = (
          cls.dummy_data
      )
      dmlab_dataset.DMLabDatasetBuilder._SHARDS = 1
      super().setUpClass()
  
imports: import tensorflow_datasets.public_api
  from tensorflow_datasets.rl_unplugged import dmlab_dataset
  from tensorflow_datasets.rl_unplugged.rlu_dmlab_rooms_select_nonmatching_object import rlu_dmlab_rooms_select_nonmatching_object
label_desc: Use image node_id 1 for calling the RluDmlabRoomsSelectNonmatchingObjectTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types