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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _init_polling(self):
 """ Bootstrap polling for throttler. To avoid spiky traffic from throttler clients, we use a random delay before the first poll. """

        with self.lock:
            if not self.running:
                return

            r = random.Random()
            delay = r.random() * self.refresh_interval
            self.channel.io_loop.call_later(
                delay=delay, callback=self._delayed_polling)
            self.logger.info(
                'Delaying throttling credit polling by %d sec', delay)