最近装龙虾需要免费的搜索，找了两个API对比

import requests

# 替换为你的 Tavily API Key
TAVILY_API_KEY = "your_tavily_api_key"
TAVILY_URL = "<https://api.tavily.com/search>"

def tavily_search(query, search_depth="advanced"):
    """
    Tavily 搜索核心函数
    :param query: 搜索关键词
    :param search_depth: basic(快速)/advanced(深度)
    :return: 结构化搜索结果（含正文提取）
    """
    payload = {
        "api_key": TAVILY_API_KEY,
        "query": query,
        "search_depth": search_depth,
        "include_answer": True,  # 是否返回 AI 总结答案
        "include_content": True,  # 是否返回网页正文
        "include_raw_content": False,
        "max_results": 5,  # 返回结果数
        "exclude_domains": ["youtube.com", "twitter.com"]  # 排除域名
    }

    try:
        response = requests.post(TAVILY_URL, json=payload)
        response.raise_for_status()  # 抛出 HTTP 错误
        results = response.json()

        # 解析结构化结果
        print("=== Tavily 搜索结果 ===")
        print(f"AI 总结答案: {results.get('answer', '无')}\\n")
        for idx, result in enumerate(results.get('results', [])):
            print(f"【结果 {idx+1}】")
            print(f"标题: {result.get('title')}")
            print(f"链接: {result.get('url')}")
            print(f"摘要: {result.get('description')[:100]}...")  # 截断摘要
            print(f"正文片段: {result.get('content', '无')[:100]}...\\n")
        return results
    except Exception as e:
        print(f"Tavily 调用失败: {e}")
        return None

# 调用示例：搜索 "2026 Python 最新特性"
tavily_search("2026 Python 最新特性")

import requests

# 替换为你的 Brave API Key
BRAVE_API_KEY = "your_brave_api_key"
BRAVE_URL = "<https://api.search.brave.com/res/v1/web/search>"

def brave_search(query):
    """
    Brave 搜索核心函数（隐私优先）
    :param query: 搜索关键词（支持标准搜索语法）
    :return: 通用搜索结果
    """
    headers = {
        "Accept": "application/json",
        "X-Subscription-Token": BRAVE_API_KEY
    }
    params = {
        "q": query,  # 支持语法：比如 "Python 性能优化 site:stackoverflow.com"
        "count": 5,  # 返回结果数
        "safesearch": "moderate",  # 安全搜索：off/moderate/strict
        "country": "us",  # 地区筛选
        "lang": "en"  # 语言筛选
    }

    try:
        response = requests.get(BRAVE_URL, headers=headers, params=params)
        response.raise_for_status()
        results = response.json()

        # 解析结果
        print("=== Brave 搜索结果 ===")
        for idx, result in enumerate(results.get('web', {}).get('results', [])):
            print(f"【结果 {idx+1}】")
            print(f"标题: {result.get('title')}")
            print(f"链接: {result.get('url')}")
            print(f"摘要: {result.get('description')[:100]}...\\n")
        return results
    except Exception as e:
        print(f"Brave 调用失败: {e}")
        return None

# 调用示例：搜索 "Python 性能优化 site:stackoverflow.com"（带语法）
brave_search("Python 性能优化 site:stackoverflow.com")

from langchain_community.tools.tavily_search import TavilySearchResults

# 初始化 Tavily 工具
tavily_tool = TavilySearchResults(
    api_key="your_tavily_api_key",
    search_depth="advanced",
    max_results=3
)

# 调用搜索
results = tavily_tool.run("2026 AI Agent 最新进展")
print(results)