<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def timeout_process_add_queue(self, module, cache_time):
 """ Add a module to the timeout_queue if it is scheduled in the future or if it is due for an update immediately just trigger that. the timeout_queue is a dict with the scheduled time as the key and the value is a list of module instance names due to be updated at that point. An ordered list of keys is kept to allow easy checking of when updates are due. A list is also kept of which modules are in the update_queue to save having to search for modules in it unless needed. """

        # If already set to update do nothing
        if module in self.timeout_update_due:
            return

        # remove if already in the queue
        key = self.timeout_queue_lookup.get(module)
        if key:
            queue_item = self.timeout_queue[key]
            queue_item.remove(module)
            if not queue_item:
                del self.timeout_queue[key]
                self.timeout_keys.remove(key)

        if cache_time == 0:
            # if cache_time is 0 we can just trigger the module update
            self.timeout_update_due.append(module)
            self.timeout_queue_lookup[module] = None
        else:
            # add the module to the timeout queue
            if cache_time not in self.timeout_keys:
                self.timeout_queue[cache_time] = set([module])
                self.timeout_keys.append(cache_time)
                # sort keys so earliest is first
                self.timeout_keys.sort()

                # when is next timeout due?
                try:
                    self.timeout_due = self.timeout_keys[0]
                except IndexError:
                    self.timeout_due = None
            else:
                self.timeout_queue[cache_time].add(module)
            # note that the module is in the timeout_queue
            self.timeout_queue_lookup[module] = cache_time