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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 get_refresh_ids(self):
 """ Get ids to search for to keep old buckets up to date. """

        ids = []
        for bucket in self.router.lonely_buckets():
            rid = random.randint(*bucket.range).to_bytes(20, byteorder='big')
            ids.append(rid)
        return ids