Question

I’m trying to test this ‘hello world’ of python (with tornado) on ubuntu:

import tornado.ioloop
import tornado.web
import tornado.httpserver

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

application = tornado.web.Application([
    (r"/", MainHandler),
])

if __name__ == "__main__":
    httpserver.stop()
    application.listen(8888)
    tornado.ioloop.IOLoop.instance().start()

My command line to run this web app:
python hello.py

However I can run this ‘hello.py’ only once. Now i’m changing the code and wish to run ‘hello.py’ again. I think that i need to stop the previously run instance of ‘hello.py’ coz it is taking port 8888. But just don’t have the clue how to do this.

I try to “import tornado.httpserver” to use the function “httpserver.stop()” but python reports at terminal that:

Traceback (most recent call last):
  File "hello.py", line 14, in <module>
    httpserver.stop()
NameError: name 'httpserver' is not defined

I try “HTTPServer.stop()” also, but it gives the same error!!!

Answer 1

if your terminal isn’t attached you can just kill the pid, if it is Ctrl + c.

related link:
http://groups.google.com/group/python-tornado/browse_thread/thread/87bc2451d79fa110/30665b2717397152?pli=1