https://www.analyticsvidhya.com/blog/2018/06/comprehensive-guide-recommendation-engine-python/， 一篇详细的入门级的推荐系统的文章，这篇文章内容详实，格式漂亮，推荐给大家，下面是翻译 （翻译关注的意思，不是直译哈）。
Comprehensive Guide to build a Recommendation Engine from scratch (in Python)
从0开始搭建推荐系统
Introduction
In today’s world, every customer is faced with multiple choices. For example, If I’m looking for a book to read without any specific idea of what I want, there’s a wide range of possibilities how my search might pan out. I might waste a lot of time browsing around on the internet and trawling through various sites hoping to strike gold. I might look for recommendations from other people.
But if there was a site or app which could recommend me books based on what I have read previously, that would be a massive help. Instead of wasting time on various sites, I could just log in and voila! 10 recommended books tailored to my taste.
现如今，每个顾客都面临多种选择. 比如，假如我想读书又不知道看点什么，那就有无数种可能的选择。wo
