input interrupt

[Nickd12]

how can i get this to just interrupt the input and continue down the while true loop. instead if there is no input after 3 seconds it end the program.

class FiveSec(threading.Thread):
    def restart(self):
        self.my_timer = time.time() + 3

    def run(self, *args):

        self.restart()
        while 1:
            time.sleep(0.1)
            if time.time() >= self.my_timer:
                break
        os.kill(os.getpid(), signal.SIGINT)




def main():

    try:

        t = FiveSec()
        t.daemon = True
        t.start()
        x = input('::> ')
        return x

    except KeyboardInterrupt:
        print("\nDone!")

while True:
    if "hi" in main():
        print("hi")


    print("hello")
    x = 2+2
    print(x)