code: def normalize_dtype(dtype):
      assert not isinstance(
          dtype, list
      ), "Expected a single dtype-like, got a list instead."
      return (
          dtype.dtype
          if ia.is_np_array(dtype) or ia.is_np_scalar(dtype)
          else np.dtype(dtype)
      )
  
imports: from __future__ import print_function, division, absolute_import
  import numpy
  import six.moves
  import imgaug
label_desc: Use image node_id 2 for calling a global function with example usage: normalize_dtype(dtype) and returns: unknown