code: def _type_convert_value(dtype, val):
      if dtype not in _known_types:
          raise RuntimeError(
              str(dtype) + " does not correspond to a known type."
          )
      return _known_types[dtype][1](val)
  
imports: from enum import Enum, unique
  import re
  from nvidia.dali._backend_enums import DALIDataType, DALIImageType, DALIInterpType
  from nvidia.dali.backend_impl.types import *
label_desc: Use image node_id 4 for calling a global function with example usage: _type_convert_value(dtype, val) and returns: _known_types