t.py

#! /usr/bin/env python

from gevent import tlmonkey, spawn, sleep, tpool
tlmonkey.patch_all()

def loop():
    while 1:
        print "hello"
        sleep(5)

def read_input():
    while 1:
        s = tpool.spawn(raw_input).get()
        print "got:", s


g1 = spawn(loop)
g2 = spawn(read_input)
g1.join()
g2.join()