agent_rag/web_tool.py

from ddgs import DDGS


class WebSearchTool:
    def __init__(self, max_results=2):
        """
        初始化免费网络搜索工具
        Args:
            max_results: 最大返回结果数
        """
        self.ddgs = DDGS()
        self.max_results = max_results
    
    def search(self, query, *args, **kwargs):
        """
        执行搜索
        
        Args:
            query: 搜索查询字符串
            
        Returns:
            搜索结果
        """
        try:

            results = list(self.ddgs.text(query, max_results=self.max_results))
            formatted_results = []
            for result in results:
                formatted_results.append({
                    "title": result.get("title", ""),
                    "link": result.get("href", ""),
                    "snippet": result.get("body", "")
                })
            
            return str({"results": formatted_results})
        except Exception as e:
            return str({"results": "null"})

web_search_tool = WebSearchTool()
def create_search_demo():
    """
    创建免费搜索工具的简洁 demo
    """

    # 示例搜索查询
    queries = [
        "2026年的农历新年是什么",
        "Python机器学习最佳实践",
        "污水处理新技术发展"
    ]

    print("=== FreeWebSearchTool 搜索 Demo ===")
    for query in queries:
        print(f"\n查询: {query}")
        response = web_search_tool.search(query)
        print(f"结果: {response}")

    print("\n=== Demo 结束 ===")


if __name__ == "__main__":
    create_search_demo()