code: def index_labels_to_array(labels, dtype=None):
      
      if isinstance(labels, (str, tuple)):
          labels = [labels]
  
      if not isinstance(labels, (list, np.ndarray)):
          try:
              labels = list(labels)
          except TypeError:  # non-iterable
              labels = [labels]
  
      labels = asarray_tuplesafe(labels, dtype=dtype)
  
      return labels
docs: Transform label or iterable of labels to array, for use in Index.
  
      Parameters
      ----------
      dtype : dtype
          If specified, use as dtype of the resulting array, otherwise infer.
  
      Returns
      -------
      array