[Python3 Web crawler developed combat] 1.6.2-Tornado installation

Tornado is a Web framework supports asynchronous by using non-blocking I / O stream, it can support thousands of open access, efficiency is very high, this section will introduce its installation.

1. Links

GitHub：https://github.com/tornadoweb/tornado

PyPI：https://pypi.python.org/pypi/tornado

The official document: http://www.tornadoweb.org

2. pip install

It is recommended to use pip install, related command is as follows:

pip3 install tornado

After machining, to complete the installation.

3. Verify the installation

Also, here you can test it with a Hello World program code is as follows:

import tornado.ioloop
import tornado.web
class MainHandler(tornado.web.RequestHandler):
    def get(self):
        self.write("Hello, world")

def make_app():
    return tornado.web.Application([
        (r"/", MainHandler),
    ])

if __name__ == "__main__":
    app = make_app()
    app.listen(8888)
    tornado.ioloop.IOLoop.current().start()

Run the program directly, can be found in the system is running a Web service in 8888, console output is not content, then access http://127.0.0.1:8888/, can be observed webpage presents Hello, world, shown in Figure 1- 42, which indicates Tornado successfully installed.

Figure 1-42 operating results

4. Conclusion

Later, we will use to build a Tornado + Redis ADSL dial-agent pool.

Source: Huawei cloud community  Author: Cui Shu Jing Qing only seek