web.py based web server serving data to clients in streaming manner

app.py

import web
import time

urls = (
    "/",    "streamer",
    )
app = web.application(urls, globals())


class streamer:
    def GET(self):
        web.header('Content-type','text/plain')
        web.header('Transfer-Encoding','chunked')        
        num_of_lines = 40
        delay = 1
        for i in range(num_of_lines):
            yield "line number {i}\n".format(i=i)
            time.sleep(delay)

if __name__ == "__main__":
    app.run()