code: def __str__(self):
      return "fonts contains incompatible glyphs: %s" % (
          ", ".join(repr(g) for g in sorted(self.glyph_errors.keys()))
      )
  
label_desc: Use image node_id 2 for calling the IncompatibleFontsError obj's underlying member method code with example usage: obj.__str__() and returns: unknown