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转自pantao ：http://segmentfault.com/a/1190000002694268?_ea=184402#articleHeader8 基本概念 文档是 MongoDB 中数据的基本单元，非常类似于关系型数据库中的行，但更具有表现力；集合 Collection 可以看作是一个动态模式（Dynamic Schema）的表；MongoDB 的一个实例可

1. install mongodb >>> brew install mongodb 2. create data directory >>> sudo mkdir -p /data/db 3. set permission for data directory >>> sudo chmod -R 777/data 4. run mongodb in frond ground(会停在

Save data into MongoDB instead of print, we do persist persist top 5 recommended apps in app_info 1. Persist top 5 apps in MongoDB 2. Do it for all apps  loop through all apps, ge

How to calculate similarity? use cosine similarity! Edit helper.py. So you can call the function in helper class when needed >>> helper = Helper() similarity = helper.cosine_simil