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python_basic-2020-7-23-16-54-55-397's Introduction

背景

MovieLens数据集是一个广泛用来研究推荐系统算法的一个数据集。这个数据集包含了来自电影推荐网站多年积累的数据。我们将基于这个数据集练习数据的处理和分析。

grouplens 下载数据集 MovieLens 1M Dataset。 数据集包含6个文件:

  • tags.csv 用户给电影打的标签:
    • userId
    • movieId
    • tag
    • timestamp
  • ratings.csv 用户给电影的评分:
    • userId
    • movieId
    • rating
    • timestamp
  • movies.csv 电影信息:
    • movieId
    • title
    • genres
  • links.csv 链接到其他资源的id:
    • movieId
    • imdbId
    • tmbdId

需求

使用多线程+多进程的方式实现同时对tags.csv还有ratings.csv进行汇总,其中tags按照tag汇总,ratings按照rating汇总,按照每个tag/rating一个文件的方式输出对应的movie, 同单进程方式实现进行比较,对比较结果进行思考。

提交方式

github工程源代码文件链接+结果截图

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