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"""
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10.3.4 在智能体中使用A2A工具
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（3）高级用法：Agent间协商
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"""
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from hello_agents.protocols import A2AServer, A2AClient
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import threading
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import time
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# 创建两个需要协商的Agent
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agent1 = A2AServer(
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name="agent1",
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description="Agent 1"
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)
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@agent1.skill("propose")
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def handle_proposal(text: str) -> str:
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"""处理协商提案"""
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import re
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import json
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# 解析提案
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match = re.search(r'propose\s+(.+)', text, re.IGNORECASE)
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proposal_str = match.group(1).strip() if match else text
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try:
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proposal = eval(proposal_str)
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task = proposal.get("task")
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deadline = proposal.get("deadline")
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# 评估提案
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if deadline >= 7: # 至少需要7天
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result = {"accepted": True, "message": "接受提案"}
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else:
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result = {
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"accepted": False,
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"message": "时间太紧",
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"counter_proposal": {"deadline": 7}
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}
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return str(result)
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except:
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return str({"accepted": False, "message": "无效的提案格式"})
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agent2 = A2AServer(
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name="agent2",
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description="Agent 2"
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)
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@agent2.skill("negotiate")
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def negotiate_task(text: str) -> str:
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"""发起协商"""
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import re
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# 解析任务和截止日期
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match = re.search(r'negotiate\s+task:(.+?)\s+deadline:(\d+)', text, re.IGNORECASE)
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if match:
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task = match.group(1).strip()
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deadline = int(match.group(2))
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# 向agent1发送提案
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proposal = {"task": task, "deadline": deadline}
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return str({"status": "negotiating", "proposal": proposal})
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else:
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return str({"status": "error", "message": "无效的协商请求"})
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# 启动服务
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if __name__ == "__main__":
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threading.Thread(target=lambda: agent1.run(port=7000), daemon=True).start()
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threading.Thread(target=lambda: agent2.run(port=7001), daemon=True).start()
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time.sleep(2)
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# 测试协商流程
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client1 = A2AClient("http://localhost:7000")
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client2 = A2AClient("http://localhost:7001")
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# Agent2发起协商
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negotiation = client2.execute_skill("negotiate", "negotiate task:开发新功能 deadline:5")
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print(f"协商请求：{negotiation.get('result')}")
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# Agent1评估提案
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proposal = client1.execute_skill("propose", "propose {'task': '开发新功能', 'deadline': 5}")
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print(f"提案评估：{proposal.get('result')}")
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# 保持服务运行
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try:
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while True:
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time.sleep(1)
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except KeyboardInterrupt:
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print("\n服务已停止")
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