René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"测试tornado出错","articleBody":"您好！我最近购买了您的爬虫书籍，按照所提供的流程配置环境。但是，在测试tornado时出现错误（排除安装过程出问题，因为import tornado没有问题）。我的系统是Win10+python3.7.7(通过anaconda安装)+tornado6.0.4，具体来说，在运行以下例子（书籍p.43）：\r\n\r\nimport tornado.ioloop\r\nimport tornado.web\r\n\r\nclass MainHandler(tornado.web.RequestHandler):\r\n    def get(self):\r\n        self.write(\"Hello, world\")\r\n\r\ndef make_app():\r\n    return tornado.web.Application([\r\n        (r\"/\", MainHandler),\r\n    ])\r\n\r\nif __name__ == \"__main__\":\r\n    app = make_app()\r\n    app.listen(8888)\r\n    tornado.ioloop.IOLoop.current().start()\r\n\r\n要么没有反应，如下：\r\n![image-20200421103220795](https://user-images.githubusercontent.com/8013124/79818917-77c8e900-83bb-11ea-8c30-adc9454afba8.png)\r\n\r\n要么在jupyter notebook里面提醒\r\nRuntimeError: This event loop is already running\r\n\r\n我在网上搜索了好久，有说老版本能够解决问题（我试了，python提醒老版本不兼容），有说添加import nest_asyncio\r\nnest_asyncio.apply()\r\n没有解决问题，我也试了，此时出现新的错误：\r\nOSError: [WinError 10048] Only one usage of each socket address (protocol/network address/port) is normally permitted\r\n\r\n请问应该如何解决这个问题呢？谢谢！\r\n","author":{"url":"https://github.com/dingliumath","@type":"Person","name":"dingliumath"},"datePublished":"2020-04-21T02:37:20.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/9/Python3WebSpider/issues/9"}