Simple example of using the threading Timer class in python

#!/usr/bin/env python
# simple example of threading.Timer in python

import time, threading

class Counter(object):
    def __init__(self, initial = 0, update_interval = 5):
        self.counter = initial
        self.update_interval = update_interval

    def inc(self):
        self.counter += 1
        # Timer only runs once so call recursively in inc()

a = Counter()
b = Counter(50, 10)
c = Counter(1000, 1)

for ct in (a, b, c):
    # increment counter and start timer thread in each object

while True:
    # loop forever
    print "%s %s %s" % (a.counter, b.counter, c.counter)

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