异步协程开发实战：构建高性能的实时搜索引擎

import tornado.WEB
import tornado.ioloop
import asyncio

# 定义搜索引擎类
class SearchEngine:
    def __init__(self):
        self.index = {}  # 倒排索引
    
    # 添加文档
    def add_document(self, doc_id, content):
        for Word in content.split():
            if word not in self.index:
                self.index[word] = set()
            self.index[word].add(doc_id)
    
    # 根据关键词搜索
    def search(self, keyword):
        if keyword in self.index:
            return list(self.index[keyword])
        else:
            return []
        

class SearchHandler(tornado.web.RequestHandler):
    async def get(self):
        keyword = self.get_argument('q')  # 获取搜索关键词
        result = search_engine.search(keyword)  # 执行搜索
        self.write({'result': result})  # 返回搜索结果


if __name__ == "__main__":
    search_engine = SearchEngine()
    search_engine.add_document(1, 'This is a test')
    search_engine.add_document(2, 'Another test')
    
    app = tornado.web.Application([
        (r"/search", SearchHandler)
    ])
    app.listen(8080)
    
    asyncio.set_event_loop_policy(asyncio.windowsSelectorEventLoopPolicy())  # 解决在Windows下的报错问题
    tornado.ioloop.IOLoop.current().start()