AttributeError: 'module' object has no attribute 'TornadoAsyncNotifier'

/***************************************************************************

 * AttributeError: 'module' object has no attribute 'TornadoAsyncNotifier'

 * 说明：

 *     Tony在用mkdocs的时候遇到这个错误，找一些资料，解决一下。

 *

 *                                  2016-10-28 深圳 南山平山村 曾剑锋

 *************************************************************************/

一、参考文档：

    . AttributeError: 'module' object has no attribute 'TornadoAsyncNotifier' #

        https://github.com/clonn/simple-livereload/issues/1

二、错误现象：

    zengjf@zengjf:~/zengjf/test$ mkdocs  serve

    INFO    -  Building documentation...

    INFO    -  Cleaning site directory

    [I  :: server:] Serving on http://127.0.0.1:8000

    [I  :: handlers:] Start watching changes

    Traceback (most recent call last):

      File "/usr/local/bin/mkdocs", line , in <module>

        sys.exit(cli())

      File "/usr/local/lib/python2.7/dist-packages/click/core.py", line , in __call__

        return self.main(*args, **kwargs)

      File "/usr/local/lib/python2.7/dist-packages/click/core.py", line , in main

        rv = self.invoke(ctx)

      File "/usr/local/lib/python2.7/dist-packages/click/core.py", line , in invoke

        return _process_result(sub_ctx.command.invoke(sub_ctx))

      File "/usr/local/lib/python2.7/dist-packages/click/core.py", line , in invoke

        return ctx.invoke(self.callback, **ctx.params)

      File "/usr/local/lib/python2.7/dist-packages/click/core.py", line , in invoke

        return callback(*args, **kwargs)

      File "/usr/local/lib/python2.7/dist-packages/mkdocs/__main__.py", line , in serve_command

        livereload=livereload,

      File "/usr/local/lib/python2.7/dist-packages/mkdocs/commands/serve.py", line , in serve

        _livereload(host, port, config, builder, tempdir)

      File "/usr/local/lib/python2.7/dist-packages/mkdocs/commands/serve.py", line , in _livereload

        server.serve(root=site_dir, host=host, port=int(port), restart_delay=)

      File "/usr/local/lib/python2.7/dist-packages/livereload/server.py", line , in serve

        LiveReloadHandler.start_tasks()

      File "/usr/local/lib/python2.7/dist-packages/livereload/handlers.py", line , in start_tasks

        if not cls.watcher.start(cls.poll_tasks):

      File "/usr/local/lib/python2.7/dist-packages/livereload/watcher.py", line , in start

        self.notifier = pyinotify.TornadoAsyncNotifier(

    AttributeError: 'module' object has no attribute 'TornadoAsyncNotifier'

三、解决办法：

    sudo pip install pyinotify --upgrade