asyncio)
Chapter 14 - Iterables, Iterators, and Generators 一篇很好的 blog 以供参考：nvie.com: Iterables vs. Iterators vs. Generators 14.1 Sentence Take #1: A Sequence of ...
Chapter 7 - Function Decorators and Closures 7.1 Decorators 101 A decorator is a callable which can take the decorated function as argument. (另外还有 class d...
Chapter 5 - Python Functions are First-Class Objects Programming language theorists define a “first-class object” as a program entity that can be: Creat...
Chapter 2 - An array of Sequences 2.1 Overview of Built-In Sequences Python inherited from ABC the uniform handling of sequences. Strings, lists, byte seq...
Chapter 1 - The Python Data Model This chapter focus on special methods, i.e. dunder methods. code interpreted as comment ...
Pipeline 的作用，见名知意，就是把多个 processor units chain up 起来。Pipeline 要求前 $N-1$ 个 processor units 是 Transformer，最后一个 processor unit 是 Estimator。我们举个例子看看就很好理解了：
首先 a Mixin is class to be mixed-in，它在 python 里起到的作用类似于 interface 或者 abstract class，但是又有点微小的差别，我们来看个例子：
Confusion matrix $\subset$ Contingency table
1. MySQLdb Installation
场景：我有一套老的数据，比如 2015 年发布的 db，现在 2016 年发布了新的数据，它的 dump file 里还是用的老的 database name db，我想把这两套数据都存在数据库里。