# news_classification_tool
基于网络爬虫的外媒新闻分类统计工具的设计与实现
主要需求包括:
(1)能够自动爬取并显示此刻至7天前的外媒新闻
(2)能够显示每篇新闻的关键词
(3)能够对新闻进行分类
(4)能够统计每类新闻的数量,并以图表形式显示
分为三大模块:
(1)新闻爬取模块:
基于Python,使用scrapy框架爬取BBC新闻网站7日内的新闻,并存储在MongoDB中。
为避免重复爬取新闻,设置布隆过滤器去重。由于每篇新闻的URL在网站中是唯一的,而URL中特定的数字串也是唯一的。因此将该数字串作为每篇新闻的id。每爬取一篇新闻前,先将其通过布隆过滤器检查该id是否存在,若存在,爬取下一篇,反之将该新闻存储进MongoDB中。若连续3篇新闻的id相同,则认为该网站并没有更新,爬取停止。
BBC新闻网站已对新闻进行关键词提取,需将关键词也爬取并存储下来
(2)文本分类模块:
利用Latent Dirichlet Allocation(简称LDA)对爬取下来的新闻根据主题分类。为一堆新闻进行聚类(所以是非监督学习),一种topic就是一类,要聚成的topic数目是事先指定的。具体实现方式是使用Python的Gensim库。它可以用来从文档中自动提取语义主题。
分类完成后需要统计各类新闻的数目。
(3)显示模块:
基于Flask框架制作简易网站,将新闻按分类显示。并能以图表形式显示各类新闻的数目。
工作计划:
3.11-3.25 完成爬取模块
3.26-4.15 完成分类模块
4.16-4.30 完成显示模块
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温馨提示
【资源说明】 基于Python+Scrapy网络爬虫的外媒新闻分类统计工具的设计与实现+全部资料齐全+部署文档.zip基于Python+Scrapy网络爬虫的外媒新闻分类统计工具的设计与实现+全部资料齐全+部署文档.zip 【备注】 1、该项目是个人高分项目源码,已获导师指导认可通过,答辩评审分达到95分 2、该资源内项目代码都经过测试运行成功,功能ok的情况下才上传的,请放心下载使用! 3、本项目适合计算机相关专业(人工智能、通信工程、自动化、电子信息、物联网等)的在校学生、老师或者企业员工下载使用,也可作为毕业设计、课程设计、作业、项目初期立项演示等,当然也适合小白学习进阶。 4、如果基础还行,可以在此代码基础上进行修改,以实现其他功能,也可直接用于毕设、课设、作业等。 欢迎下载,沟通交流,互相学习,共同进步!
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