Py之tornado：tornado库的简介、安装、使用方法之详细攻略

1. pip install tornado
2. pip install tornado==4.5.3
3. pip show tornado
4. pip install --upgrade tornado
5. pip install --upgrade -i https://pypi.tuna.tsinghua.edu.cn/simple tornado
6. pip install --upgrade -i https://pypi.tuna.tsinghua.edu.cn/simple tornado==4.5.3

1. import tornado.ioloop
2. import tornado.web
3. 
4. class MainHandler(tornado.web.RequestHandler):
5.     def get(self):
6.         self.write("Hello, world")
7. 
8. def make_app():
9.     return tornado.web.Application([
10.         (r"/", MainHandler),
11.     ])
12. 
13. if __name__ == "__main__":
14.     app = make_app()
15.     app.listen(8888)
16.     tornado.ioloop.IOLoop.current().start()
17.