This book covers two broad classes of machine learning algorithms: penalized linear regression (for example, Ridge and Lasso) and ensemble methods (for example, Random Forests and Gradient Boosting). Each of these families contains variants that wil
Learning Scrapy英文版，有详细目录。Scrapy is a robust web framework for scraping data from various sources. As a casual web user, you will often fnd yourself wishing to be able to get data from a website that you're browsing on a spreadsheet program like Exce
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MongoDB基本操作之Python篇
连接数据库 MongoClient VS Connection5.2查询特定键(￡ ields)
select name, age from users where age=21
for u in db. users find((age: 21], ["name",age!): print u
for u in db. users find(fields =L"name",age ): printl
5.3排序(SORT)
pymmongo. ASCEND
