code: def normalizeKerningValue(value):
      
      if not isinstance(value, (int, float)):
          raise TypeError("Kerning value must be a int or a float, not %s."
                          % type(value).__name__)
      return value
docs: Normalizes kerning value.
  
      * **value** must be an :ref:`type-int-float`.
      * Returned value is the same type as input value.