def METHOD_NAME(self, oai_set):
    """Return and remove from cache an OAI Set."""
    key = '{}:{}'.format(self.cache_prefix, oai_set)
    # TODO: Remove map as it needs to be string
    oai_sets = set(map(int, self.cache.smembers(key)))
    self.cache.delete(key)
    return oai_sets