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宇智波小高

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16个月前

Pandas 按组的时间累积总和

问题描述我有一个数据框,其中为每个 ID 记录了 1 个或多个事件.对于每个事件,都会记录 id、度
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18个月前

table列头固定

Fixed Header And Columns</titl </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="329986"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="329986"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="329986"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="329986"></i><span>0</span></span> </li> <li> <a href="/b80b/329986.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">18个月前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b19b/325870.html">如何使用 Linux anacron 命令</a> </p> <a href="/b19b/325870.html">导读与其手动执行重复性的任务,不如让Linux为你做。在2021年,人们有更多的理由喜欢Linux。在这个系列中,我将分享使用Linux的21个不同理由。自动化是使用Linux的最佳理由之一。 </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="325870"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="325870"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="325870"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="325870"></i><span>0</span></span> </li> <li> <a href="/b19b/325870.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">18个月前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b19b/325136.html">了解下C# 判断</a> </p> <a href="/b19b/325136.html">导读C#是一个现代的、通用的、面向对象的编程语言,它是由微软(Microsoft)开发的,由Ecma和ISO核准认可的。判断结构要求程序员指定一个或多个要评估或测试的条件,以及条件为真时要执行的语句( </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="325136"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="325136"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="325136"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="325136"></i><span>0</span></span> </li> <li> <a href="/b19b/325136.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">2年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b80b/264755.html">网易云歌手爬取</a> </p> <a href="/b80b/264755.html">#需求:获取每一个大分类下的每个子分类下的所有歌手名#思路:#1.获取大分类的URL,并请求#2.获取小分类的URL,并请求#3.获取歌手名importrequestsfromlxmlimportetree#定义请求函数defget... </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="264755"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="264755"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="264755"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="264755"></i><span>0</span></span> </li> <li> <a href="/b80b/264755.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">2年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b51b/246958.html">多表查询(概念解析)</a> </p> <a href="/b51b/246958.html">连接:多表查询需要先对关系表进行外键约束,再通过内/外连接查询方式进行表的关联查询即多表查询所需两个先提条件:表间有主外键关系通过连接查询方式一对多:altertabletb_productaddcon... </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="246958"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="246958"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="246958"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="246958"></i><span>0</span></span> </li> <li> <a href="/b51b/246958.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">2年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b167b/175655.html">赛迪顾问发布首本数字营销解决方案白皮书</a> </p> <a href="/b167b/175655.html">  2019年2月28日,由赛迪顾问股份有限公司主办的以“数字转型·智创未来”为主题的"2019中国IT市场年会暨赛迪生态伙伴大会"在北京香格里拉酒店顺利召开。赛迪顾问股份有限公司在“大数据高峰论坛”上发布了赛迪顾问最新的研究成果《2019年中国数字营销解决方案市场白皮书》,报告从全球和中国数字营销变革特点、中国数字营销解决方案主要架构、市场规模及行业结构、市场主要竞争格局以及未来发展趋势等方面进行了深度分析,会上还发布了2018年中国数字营销解决方案市场品牌竞争力矩阵图和赛迪数字营销解决方案商20强榜单。<pstyle="margin:5px0px10px;padding:0px;border:0px;font-size:14px;color: </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="175655"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="175655"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="175655"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="175655"></i><span>0</span></span> </li> <li> <a href="/b167b/175655.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">2年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b75b/251121.html">Oracle常用的内置函数总结</a> </p> <a href="/b75b/251121.html">转换函数to_char(d|n,fmt):把日期和数字转换为指定格式的字符串;to_number(x,fmt):把一个字符串转换为一个指定格式的数字;判空函数nvl(x,value):如果x为null,返回value,否则返回x;nvl2(x,value1,value2):若果x非空... </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="251121"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="251121"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="251121"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="251121"></i><span>0</span></span> </li> <li> <a href="/b75b/251121.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">2年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b36b/245967.html">Android启动页优化之实现应用秒开</a> </p> <a href="/b36b/245967.html">android应用冷启动时,需要从application开始启动,加载时间就会比较长,这段时间里,用户所能看到的就是”白屏“(这是因为默认的apptheme的android:windowbackground默认是设置成白色的),因此我认为真正的启动页就应该是... </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="245967"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="245967"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="245967"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="245967"></i><span>0</span></span> </li> <li> <a href="/b36b/245967.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">3年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b167b/181810.html">首届全国中台战略大会暨第三届互联网架构峰会</a> </p> <a href="/b167b/181810.html">科技步伐在向产业互联网迈进的大趋势下,互联网企业和传统行业正在相互触碰及深度交融。企业数字化转型如火如荼,中台战略及相应互联网架构的演进或重构正是当前IT的建设重点,同时,积极探索人工智能应用和物联网技术产品的开发,以及技术研发和技术运维的效率和组织转型,都是我们关注的焦点。<spanstyle="font-family: </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="181810"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="181810"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="181810"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="181810"></i><span>0</span></span> </li> <li> <a href="/b167b/181810.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">3年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b167b/178751.html">拥抱5G、智慧升级:康铂酒店论道深圳饭店业智慧酒店论坛</a> </p> <a href="/b167b/178751.html">11月22日,由深圳市饭店业协会主办的“拥抱5G、智慧升级”第二届深圳饭店业智慧酒店论坛暨博鳌文化旅游泛住宿(深圳)论坛在深圳会展中心隆重举行。此次论坛邀请诸多智慧酒店专家与酒店从业者齐聚一堂,共襄盛事。论坛以前瞻的思维、全新的模式、领先的技术、典型的案例及精彩的互动,将技术、文化、创新模式与成果呈现给酒店同行,并展示了智慧酒店领域的最新产品。备受行业关注的OYO模式以及主题酒店等新商业模式也在本次论坛得到解读。康铂酒店中国区总裁肖波先生受邀出席活动并参与圆桌论坛——“植入智慧DNA的全新入住体验”。<centerstyle="color:rgb(75,73,74);font-family:宋体;font-size:16px;text-indent:2em </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="178751"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="178751"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="178751"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="178751"></i><span>0</span></span> </li> <li> <a href="/b167b/178751.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">3年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b10b/244201.html">hadoop 解决方案</a> </p> <a href="/b10b/244201.html">hadoop是一个开源的大数据分析软件,或者说编程模式。它是通过分布式的方式处理大数据的,因为开元的原因现在很多的企业或多或少的在运用hadoop的技术来解决一些大数据的问题,在数据仓库方面hadoop是非常强大的。但在数... </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="244201"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="244201"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="244201"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="244201"></i><span>0</span></span> </li> <li> <a href="/b10b/244201.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">3年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b113b/244113.html">mapreduce 心跳间隔</a> </p> <a href="/b113b/244113.html">心律:现代汉语将“心律”解释为:“心脏跳动时的节律。”正常人的心脏应该能够有节奏、有规律的跳动。每一次跳动与下一次跳动之间有一定的时间间隔,每一次跳动之间的间隔时间上下误差不超过0.12秒,在医学上均视为正常。由于... </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="244113"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="244113"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="244113"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="244113"></i><span>0</span></span> </li> <li> <a href="/b113b/244113.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">3年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b42b/221766.html">impala 更新数据</a> </p> <a href="/b42b/221766.html">Impala获取hive的metadata<br/>Impala通常和Hive共用同一个metadata数据库(通常是MySQL/PostgreSQL),所以Impala能够读取到Hive的元数据信息.如果Impala需要访问Hive表,需要将Hivemetadata刷新到impala中.<br/>在Hive中Create/Drop表后,或者HDFSrebalance,或者手工删除HDFS的文件后,则需要在impala中执行下面两行命令:<br/>INVALIDATEMETADATAtable_name;<br/>describetable_name;<br/>第一行命令INVALIDATEMETADATA告诉impala指定的table元数据已经过期,impala将在下一次使用到该表时自动刷新元数据,第二行命令即触发impala去更新元数据,以免将来真正使用该表耗时太久.<br/>如果Impala已经知道了Hive表的存在后,又通过Hive增加或删除分区或altertable,使用refresh </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="221766"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="221766"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="221766"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="221766"></i><span>0</span></span> </li> <li> <a href="/b42b/221766.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">3年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b10b/215632.html">hadoop面试题及答案</a> </p> <a href="/b10b/215632.html">应该是文件执行权限的问题, 你的hadoop用户没有执行java的权限, 你需要修改一下/usr/local/jdk1.7.0_17/bin/java 的文件权限:<br><br>chmod o+x /usr/local/jdk1.7.0_17/bin/java<br><br><hr style="border: none;border-bottom:2px dashed #000"><br>  $hadoop=`which hadoop`; <br>#这里加上一句<br>print "$hadoop fs -get .....\n";<br>`$hadoop fs -get ......`;<br>看看打印出来的命令是不是你想要的,如果是你想要的,就手动执行一遍。<br>有问题继续追问。 </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="215632"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="215632"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="215632"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="215632"></i><span>0</span></span> </li> <li> <a href="/b10b/215632.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">3年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b140b/218458.html">tableau 多个数据源</a> </p> <a href="/b140b/218458.html">可以,在一个sheet页中你点工具栏数据-编辑关系,可以编辑主数据源和辅数据源的连接关系。<br><br><hr style="border: none;border-bottom:2px dashed #000"><br>  <img src="http://www.all.com/files/Articles/416/0/92/92001_20200923103544339.jpg" /><br><br>搜一下:麻烦问一下tableau支持多个数据源下的表关联吗 </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="218458"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="218458"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="218458"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="218458"></i><span>0</span></span> </li> <li> <a href="/b140b/218458.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">3年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b158b/221895.html">kubernetes jenkins</a> </p> <a href="/b158b/221895.html">Kubernetes在容器环境中是作为该环境的管理与部署引擎而存在的。使用最基本的Kubernetes就可以在物理硬件或虚拟机上调度和运行应用程序。Kubernetes的更高级用法让开发人员得以从以宿主机为中心的世界中脱身,进入一个以容器为中心的环境。<br>所以工作还是有前途的!<br><br><hr style="border: none;border-bottom:2px dashed #000"><br>  没有 </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="221895"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="221895"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="221895"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="221895"></i><span>0</span></span> </li> <li> <a href="/b158b/221895.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">3年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b135b/219620.html">sublime text3配置乱码</a> </p> <a href="/b135b/219620.html">sublimetext3bulidmac版是macos平台上的一款非常不错的代码编辑器,同时sublimetext也是跨平台的,界面和功能感觉和TextMate比较相似。<br/>sublimetext3中文乱码解决方法介绍:<br/>1、打开sublimetext3,按windows:Ctrl+~;mac:control+~打开控制行,复制粘贴以下python代码,然后回车运行。<br/>2、重启sublimetext3。<br/>3、按windows:Ctrl+Shift+P;mac:command+shift+P打开命令行,输入InstallPackage,回车,然后继续输入ConvertToUTF8,回车。<br/>可是安装后打开本地文件还是错误。<br/>原来是缺少Codecs,所以在此打开命令行-->输入InstallPackage-->Codecs,<br/>重启sublimetext3,打开乱码文件按下ctrl+shift+c<br/>pc端sublimetext3中文乱码解决方法:<br/><br </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="219620"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="219620"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i 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href="/b153b/216767.html">第一阶段:熟练掌握Scala语言<br/>1,spark框架是采用scala语言写的,精致优雅。想要成为spark高手,你就必须阅读spark源码,就必须掌握scala。?<br/>2,虽然现在的spark可以使用多种语言开发,java,python,但是最快速和支持最好的API依然并将永远是Scala的API,所以必须掌握scala来编写复杂的和高性能的spark分布式程序。?<br/>3尤其是熟练掌握Scala的trait,apply,函数式编程,泛型,逆变,与协变等。<br/>第二阶段:精通spark平台本身提供给开发折的API<br/>1,掌握spark中面向RDD的开发模式,掌握各种transformation和action函数的使用。?<br/>2,掌握Spark中的款依赖和窄依赖,lineage机制。?<br/>3,掌握RDD的计算流程,如Stage的划分,spark应用程序提交给集群的基础过程和Work节点基础的工作原理。<br/>第三阶段:深入Spark内核<br/>此阶段主要是通过Spark框架的源码研读来深入Spark内核部分:?<br/>1,通过源码掌握Spark的任务提交 </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="216767"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="216767"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="216767"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " 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