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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 subscribe( self, requested_timeout=None, auto_renew=False, event_queue=None):
 """Subscribe to the service's events. Args: requested_timeout (int, optional):
 If requested_timeout is provided, a subscription valid for that number of seconds will be requested, but not guaranteed. Check `Subscription.timeout` on return to find out what period of validity is actually allocated. auto_renew (bool):
 If auto_renew is `True`, the subscription will automatically be renewed just before it expires, if possible. Default is `False`. event_queue (:class:`~queue.Queue`):
 a thread-safe queue object on which received events will be put. If not specified, a (:class:`~queue.Queue`) will be created and used. Returns: `Subscription`: an insance of `Subscription`, representing the new subscription. To unsubscribe, call the `unsubscribe` method on the returned object. """

        subscription = Subscription(
            self, event_queue)
        subscription.subscribe(
            requested_timeout=requested_timeout, auto_renew=auto_renew)
        return subscription