code: def _get_interpretation_function(interpretation, dtype):
      
  
      type_string = dtype.__name__
      name = "%s__%s" % (interpretation, type_string)
  
      global _interpretations
  
      if not hasattr(_interpretations, name):
          raise ValueError("No transform available for type '%s' with interpretation '%s'."
                           % (type_string, interpretation))
  
      return getattr(_interpretations, name)
docs: Retrieves the interpretation function used.