code: def reload(script, input, output):
      
      script = Path(script).expand().abspath()
      output = Path(output).expand().abspath()
      input = input if isinstance(input, (list, tuple)) else [input]
      output.makedirs_p()
      _script_reload(script, input, output)
docs: reloads the generator script when the script files
      or the input files changes