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Python爬虫系列（一）：urllib的使用及问题解决1 使用正则表达式匹配出现的问题代码如下：
12345678910111213141516171819202122232425262728from urllib import requestimport urllibimport redef d
...
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推荐系统实践（四）：利用用户标签数据根据给物品打标签的人的不同，标签应用一般分为两种：一种是让作者或者专家给物品打标签；另一种是让普通用户给物品打标签，也就是UGC（User Generated Content，用户生成的内容）的标签应用。UGC的标签系统是一种表示用户兴趣和物品语义的重要方式。当一
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推荐系统实践（三）：冷启动问题1 冷启动问题简介实现个性化推荐：
用户冷启动：新用户
物品冷启动：新物品
系统冷启动：新网站（没有用户，没有用户行为，只有物品信息）
解决方案：
①提供非个性化推荐，如热门榜单物品等。
②利用注册信息
③利用
...
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