Periodic call

gistfile1.py

import threading
import time

class Ti(threading.Thread):
    def __init__(self):
        print('inittt')
        self.k = 1 
        self.t = None
        super().__init__()

    def check(self):
        print('check%s' % self.k)
        self.k += 1
        self.t = threading.Timer(1, self.check)
        self.t.start()

    def run(self):
        self.check()

t  = Ti()
t.start()
time.sleep(5)
t.t.cancel()
t.join()