code: def dump_engines(target=sys.stderr):
      
      print("Available templating engines:", file=target)
  
      width = max(len(engine) for engine in engines.engines)
      for handle, engine in sorted(engines.engines.items()):
          description = engine.__doc__.split('\n', 0)[0]
          print("  %-*s  -  %s" % (width, handle, description), file=target)
docs: Print successfully imported templating engines.