class_docstr: Exception raised when a DatasetDict is passed to Datalab.
  
  Usually, this means that a dataset identifier was passed to Datalab, but
  the dataset is a DatasetDict, which contains multiple splits of the dataset.
code: def __init__(self):
      message = (
          "Please pass a single dataset, not a DatasetDict. "
          "Try specifying a split, e.g. `dataset = load_dataset('dataset', split='train')` "
          "then pass `dataset` to Datalab."
      )
      super().__init__(message)
  
imports: import os
  from typing import Any, Callable, Dict, List, Mapping, Optional, Tuple, Union, cast, TYPE_CHECKING
  import numpy
  import pandas
  from datasets.arrow_dataset import Dataset
  from datasets import ClassLabel
  from cleanlab.internal.validation import labels_to_array
label_desc: Use image node_id 1 to create a new DatasetDictError object from inherited base classes: ValueError with example: obj = DatasetDictError()