中文字幕av专区_日韩电影在线播放_精品国产精品久久一区免费式_av在线免费观看网站

溫馨提示×

Scrapy如何支持正則表達式進行數據提取

小樊
81
2024-05-15 13:54:17
欄目: 編程語言

Scrapy在提取數據時可以使用正則表達式來提取特定模式的數據,可以通過在爬蟲文件中的回調函數中使用re模塊來實現正則表達式的匹配和提取。下面是一個使用正則表達式提取數據的示例代碼:

import scrapy
import re

class MySpider(scrapy.Spider):
    name = 'myspider'

    def start_requests(self):
        url = 'http://example.com'
        yield scrapy.Request(url, callback=self.parse)

    def parse(self, response):
        # 使用正則表達式提取數據
        pattern = re.compile(r'<title>(.*?)</title>')
        title = re.search(pattern, response.text).group(1)

        yield {
            'title': title
        }

在上面的代碼中,我們定義了一個正則表達式模式來提取頁面中的標簽中的內容。然后使用re.search方法在response.text中搜索匹配該模式的內容,并提取出相應的數據。最后將提取到的數據以字典的形式返回。</p> </p> </div> <p class="tj-wenzhang recommend-article"></p> <div id="pl5zbpn5v5" class="zixun-tj-product adv-bottom"></div> <div id="pl5zbpn5v5" class="user-estimate clearfix"> <div id="pl5zbpn5v5" class="like"><i></i><span>0</span> 贊</div> <div id="pl5zbpn5v5" class="dislike"><i></i><span>0</span> 踩</div> </div> </div> </div> <div id="pl5zbpn5v5" class="prve-next-qanews"> <ul> </ul> </div> <div id="pl5zbpn5v5" class="hot-answer"> <div id="pl5zbpn5v5" class="hot-answer-tit"><h2>最新問答</h2></div> <div id="pl5zbpn5v5" class="hot-answer-list"> <ul> <li> <a href="/ask/39933823.html">C#中Helix Toolkit是什么</a> </li> <li> <a href="/ask/18578442.html">C#中Split方法與其他字符串處理函數的比較</a> </li> <li> <a href="/ask/76876483.html">如何確保使用Split方法后的結果字符串不包含空字符串</a> </li> <li> <a href="/ask/94684240.html">Split方法在處理大量數據時效率如何</a> </li> <li> <a href="/ask/57263969.html">在C#中Split方法是否支持正則表達式作為分隔符</a> </li> <li> <a href="/ask/84082405.html">如何使用Split方法處理包含多個分隔符的復雜字符串</a> </li> <li> <a href="/ask/27998759.html">Split方法在處理包含特殊字符的字符串時應注意哪些問題</a> </li> <li> <a href="/ask/36656510.html">在C#中Split方法可以處理Unicode字符嗎</a> </li> <li> <a href="/ask/91957465.html">如何設置Split方法的限制參數以防止內存不足</a> </li> </ul> </div> </div> </div> <div id="pl5zbpn5v5" class="qa-box-right"> <div id="pl5zbpn5v5" class="hot-product-link adv-right"></div> <div id="pl5zbpn5v5" class="browse-other-question"> <div id="pl5zbpn5v5" class="other-question-tit"><i></i>相關問答</div> <div id="pl5zbpn5v5" class="other-question-list"> <ul> <li> <a href="/ask/82400217.html">怎么使用c#正則表達式提取文本內容</a> </li> <li> <a href="/ask/32700387.html">怎么用mysql正則表達式提取字符串</a> </li> <li> <a href="/ask/12867593.html">hive怎么使用正則表達式過濾數據</a> </li> <li> <a href="/ask/81404348.html">MySQL中如何使用正則表達式進行數據查詢和匹配</a> </li> <li> <a href="/ask/47511593.html">MySQL如何支持正則表達式搜索</a> </li> <li> <a href="/ask/43157179.html">ASP中怎么用正則表達式驗證數據</a> </li> <li> <a href="/ask/13852999.html">怎么通過Nginx正則表達式進行內容注入</a> </li> <li> <a href="/ask/32278761.html">PHP中怎么使用正則表達式匹配和提取數據</a> </li> <li> <a href="/ask/66147865.html">怎么用Selenium進行正則表達式查找</a> </li> </ul> </div> </div> <div id="pl5zbpn5v5" class="hot-tag"> <div id="pl5zbpn5v5" class="hot-tag-tit"><h2>相關標簽</h2></div> <div id="pl5zbpn5v5" class="hot-tag-list clearfix"> <a href="/ask/tags/669/">icp備案</a> <a href="/ask/tags/925/">ci框架</a> <a href="/ask/tags/1795/">gcc</a> <a href="/ask/tags/3081/">香港cdn服務器</a> <a href="/ask/tags/3261/">CDN技術</a> <a href="/ask/tags/4203/">cdn購買使用</a> <a href="/ask/tags/5109/">使用cdn加速技術</a> <a href="/ask/tags/5775/">國內免備案高防cdn</a> <a href="/ask/tags/6189/">cn2云服務器</a> <a href="/ask/tags/7171/">韓國cn2虛擬主機</a> <a href="/ask/tags/7409/">境外cdn</a> <a href="/ask/tags/7785/">英國cn2虛擬主機</a> <a href="/ask/tags/8053/">美國云防御高防cdn</a> <a href="/ask/tags/8407/">cdn與云服務器</a> <a href="/ask/tags/9851/">低價香港高防cdn</a> <a href="/ask/tags/14215/">executereader</a> <a href="/ask/tags/14937/">schedulerfactorybean</a> <a href="/ask/tags/16159/">c#list</a> <a href="/ask/tags/17075/">C++析構函數</a> <a href="/ask/tags/17327/">decimalformat</a> </div> </div> </div> </div> </div> <div id="pl5zbpn5v5" class="footer"> <div id="pl5zbpn5v5" class="other-link clearfix"> <div id="pl5zbpn5v5" class="link-look clearfix"> <div id="pl5zbpn5v5" class="link-list"> <div id="pl5zbpn5v5" class="link-title">產品服務</div> <ul> <li><a href="/cloud/">云服務器</a></li> <li><a href="/ddos/">高防服務器</a></li> <li><a href="/ip/">高防IP</a></li> <li><a href="/physicsserver/">裸金屬服務器</a></li> <!--<li><a href="/mainframe/">專屬宿主機</a></li>--> <li><a href="/trusteeship/">機柜租用</a></li> <li><a href="/ssl/">SSL證書</a></li> <li><a href="/ddoscdn/">高防CDN</a></li> <li><a href="/elasticip/">彈性IP</a></li> <!--<li><a href="/clouddisk/">云硬盤</a></li>--> </ul> </div> <div id="pl5zbpn5v5" class="link-list"> <div id="pl5zbpn5v5" class="link-title">地區劃分</div> <ul> <!-- <li><a href="/beijing/">北京服務器</a></li>--> <li><a href="/hk/">中國香港服務器</a></li> <li><a href="/usa/">美國服務器</a></li> <li><a href="/germany/">德國服務器</a></li> <li><a href="/japan/">日本服務器</a></li> <li><a href="/korea/">韓國服務器</a></li> <li><a href="/singapore/">新加坡服務器</a></li> </ul> </div> <div id="pl5zbpn5v5" class="link-list"> <div id="pl5zbpn5v5" class="link-title">專題活動</div> <ul> <li><a rel="nofollow" target="_blank" class="c_login">控制臺</a></li> <li><a href="/appmarket/">應用市場</a></li> <li><a href="/coupon/">最新活動</a></li> <!-- <li><a href="/swarm.html">Swarm云服務器</a></li>--> <!-- <li><a target="_blank">swarm</a></li>--> </ul> </div> <div id="pl5zbpn5v5" class="link-list"> <div id="pl5zbpn5v5" class="link-title">幫助支持</div> <ul> <li><a href="/help/">幫助中心</a></li> <li><a href="/help/index_38_41.html">網站備案</a></li> <li><a href="/help/index_45_46.html" rel="nofollow">法律條款</a></li> <li><a href="/city/">全國服務</a></li> <li><a href="/cve/">安全漏洞</a></li> <li><a href="/theme/">主題地圖</a></li> </ul> </div> <div id="pl5zbpn5v5" class="link-list"> <div id="pl5zbpn5v5" class="link-title">關于我們</div> <ul> <li><a href="/about/" rel="nofollow">關于億速云</a></li> <li><a href="/case/">客戶案例</a></li> <li><a href="/news/">新聞資訊</a></li> <li><a href="/zixun/time/">資訊地圖</a></li> <li><a href="/ask/time/">問答地圖</a></li> <li><a href="/about/contact.html">聯系我們</a></li> <li><a href="/employ/">人才招聘</a></li> </ul> </div> </div> <div id="pl5zbpn5v5" class="yisu-contact"> <div id="pl5zbpn5v5" class="contact-tit">售后咨詢</div> <div id="pl5zbpn5v5" class="yisu-phone">7*24小時在線電話:<span>400-100-2938</span></div> <div id="pl5zbpn5v5" class="yisu-qq">7*24小時在線 QQ:<span>800811969</span></div> <div id="pl5zbpn5v5" class="guanzhu-tit">關注億速云</div> <div id="pl5zbpn5v5" class="erweima-box clearfix"> <div id="pl5zbpn5v5" class="wechat-erwei"> <img src="https://cache.yisu.com/www/images/ys-gzh-erweima.png" alt=""> <p>億速云公眾號</p> </div> <div id="pl5zbpn5v5" class="phonenet-erwei"> <img src="https://cache.yisu.com/www/images/ys-web-erweima.png" alt=""> <p>手機網站二維碼</p> </div> </div> </div> </div> <div id="pl5zbpn5v5" class="footer-bottom"> <p>Copyright ? Yisu Cloud Ltd. All Rights Reserved. 2018 版權所有</p> <p><span>廣州億速云計算有限公司</span><span><a style="color: #6C6E73;" target="_blank" rel="nofollow">粵ICP備17096448號-1</a> </span><span><span id="pl5zbpn5v5" class="police-icon"></span>粵公網安備 44010402001142號</span><!--<span>律所顧問:廣州正大</span>--><span>增值電信業務經營許可證編號:B1-20181529</span></p> </div> </div> <div id="pl5zbpn5v5" class="common-backtop-link"><i></i></div> <script type="text/javascript" src="https://cache.yisu.com/www/js/qa/qa.js?v=1723628405&v=202407161409"></script> <script type="text/javascript" src="https://cache.yisu.com/www/js/jquery.SuperSlide.2.1.js?v=202407161409"></script> <script type="text/javascript" src="https://cache.yisu.com/www/js/jquery-ui.js?v=202407161409"></script> <script type="text/javascript" src="https://cache.yisu.com/www/js/jquery.flexslider-min.js?v=202407161409"></script> <script type="text/javascript" src="https://cache.yisu.com/www/js/common/common.js?v=202407161409"></script> <script type="text/javascript" src="https://cache.yisu.com/www/js/common/kfonline.js?v=202407161409"></script> <script type="text/javascript"> var _hmt = _hmt || []; (function() { var hm = document.createElement("script"); hm.src = "https://#/hm.js?0910b1e24e81c0e61462b7a766830fec"; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(hm, s); $('.fifth_ic').hover(function(){ $(this).children('.erweima_box').show() },function(){ $(this).children('.erweima_box').hide() }) })(); (function(b,a,e,h,f,c,g,s){b[h]=b[h]||function(){(b[h].c=b[h].c||[]).push(arguments)}; b[h].s=!!c;g=a.getElementsByTagName(e)[0];s=a.createElement(e); s.src="http://s.union.#/"+f+".js";s.defer=!0;s.async=!0;g.parentNode.insertBefore(s,g) })(window,document,"script","_qha",340413,false); </script> <script type="text/javascript" src="https://res.wx.qq.com/open/js/jweixin-1.2.0.js"></script> <footer> <div class="friendship-link"> <p>感谢您访问我们的网站,您可能还对以下资源感兴趣:</p> <a href="http://www.5655pk.com/" title="中文字幕av专区">中文字幕av专区</a> <div class="friend-links"> </div> </div> </footer> <a href="http://" target="_blank">浮山县</a>| <a href="http://" target="_blank">吴川市</a>| <a href="http://" target="_blank">会同县</a>| <a href="http://" target="_blank">宁河县</a>| <a href="http://" target="_blank">南丰县</a>| <a href="http://" target="_blank">河池市</a>| <a href="http://" target="_blank">长乐市</a>| <a href="http://" target="_blank">长泰县</a>| <a href="http://" target="_blank">许昌市</a>| <a href="http://" target="_blank">龙江县</a>| <a href="http://" target="_blank">托克托县</a>| <a href="http://" target="_blank">辽阳县</a>| <a href="http://" target="_blank">库车县</a>| <a href="http://" target="_blank">大邑县</a>| <a href="http://" target="_blank">泰兴市</a>| <a href="http://" target="_blank">石景山区</a>| <a href="http://" target="_blank">新田县</a>| <a href="http://" target="_blank">弥渡县</a>| <a href="http://" target="_blank">肇州县</a>| <a href="http://" target="_blank">铜梁县</a>| <a href="http://" target="_blank">鸡西市</a>| <a href="http://" target="_blank">邹平县</a>| <a href="http://" target="_blank">洛扎县</a>| <a href="http://" target="_blank">乌鲁木齐市</a>| <a href="http://" target="_blank">亚东县</a>| <a href="http://" target="_blank">宁强县</a>| <a href="http://" target="_blank">侯马市</a>| <a href="http://" target="_blank">泰州市</a>| <a href="http://" target="_blank">常山县</a>| <a href="http://" target="_blank">宣城市</a>| <a href="http://" target="_blank">进贤县</a>| <a href="http://" target="_blank">昌邑市</a>| <a href="http://" target="_blank">旺苍县</a>| <a href="http://" target="_blank">枣阳市</a>| <a href="http://" target="_blank">武汉市</a>| <a href="http://" target="_blank">昌图县</a>| <a href="http://" target="_blank">区。</a>| <a href="http://" target="_blank">连平县</a>| <a href="http://" target="_blank">五大连池市</a>| <a href="http://" target="_blank">包头市</a>| <a href="http://" target="_blank">蓝田县</a>| <script> (function(){ var bp = document.createElement('script'); var curProtocol = window.location.protocol.split(':')[0]; if (curProtocol === 'https') { bp.src = 'https://zz.bdstatic.com/linksubmit/push.js'; } else { bp.src = 'http://push.zhanzhang.baidu.com/push.js'; } var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(bp, s); })(); </script> </body> </html> <script type="text/javascript" src="https://cache.yisu.com/www/vendor/highlight/highlight.js"></script> <script>hljs.initHighlightingOnLoad();</script> <script> document.addEventListener('DOMContentLoaded', (event) => { document.querySelectorAll('pre').forEach((block) => { hljs.highlightBlock(block); }); }); </script> <script> var page_position = 'detail'; parseInLinks(); getDetialQuantities(); </script>