import uwsgi
import threading
import time

def foo():
    while True:
        time.sleep(1)
        print("ciao, sono un thread")

t = threading.Thread(target=foo)
t.daemon=True
t.start()
def application(e, s):
    s('200 OK', [('Content-Type','text/html')])
    for i in range(0,3):
        yield uwsgi.async_sleep(1)
        yield "iter: %d<br/>" % i