def compute_final_reward(self):
"""
如果虚拟网络请求能够被成功映射，那么最终奖赏为收益减去成本；否则，最终奖赏为一个无穷小的值
"""
node_map, link_map = {}, {}
for i in range(self.vnr.number_of_nodes()):
node_map.update({i: self.chosen_ids[i]})
link_map = Network.find_path(self.sub, self.vnr, node_map)
if len(link_map) == self.vnr.number_of_edges():
requested = Evaluation.calculate_revenue(self.vnr)
occupied = Evaluation.calculate_cost(self.vnr, link_map)
return 1000 + requested - occupied
else:
return LIMIT
