Как на python сделать таймер?

from time import monotonic

t = monotonic()
while True:
    if monotonic() - t > 10:
        t = monotonic()
        print('tick')

import time

print("О чём вам напомнить?")

text = str(input())

print("Через сколько минут?")

local_time = float(input())

local_time = local_time * 60

time.sleep(local_time)

print(text)

from threading import Timer
from time import sleep

def hello():
    print("Hello user!")

def bye():
    sleep(5)
    print("Bye...bye...")

while 1:
    timer = Timer(3, hello)
    timer.start()
    bye()

import signal, os

def handler(signum, frame):
    print 'Signal handler called with signal', signum
    exit()

signal.signal(signal.SIGALRM, handler)
signal.alarm(5)

for i in range(0, 1000000):
    print "i: %s\n" % (i)

while True:
    for i in range(10):
        sleep(0.5)
        print('Processing///')
        if i == 2:  # 0,1, [2] - exit from the loop
            break
    break