April 2023
Intermediate to advanced
769 pages
25h 16m
Chinese
Content preview from 流畅的Python（第2版）
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前言
｜
iii
第二部分 函数即对象
第二部分探讨作为
Python
语言一等对象的函数
，说明这意味着什么、对一些流行的
设计模式有何影响，以及如何利用闭包（
closure
）实现函数装饰器
。这一部分还涉及
Python
中
可调用对象的概念、函数属性、内省（
introspection
）、参数注解，以及
Python 3
新引入的
nonlocal
声明。第
8
章介绍重要的新功能类型提示在函数签名中的使用。
第三部分 类和协议
第三部分的重点转移到自己动手构建类上，这与第
5
章介绍的类构建器截然不同
。与其
他面向对象语言一样，
Python
有
自己的一套功能，可能并不会出现在你我学习过的其他
基于类的编程语言中。这一部分的各章说明如何自己动手构建容器、抽象基类和协议，
以及如何处理多重继承、如何在必要时实现运算符重载。第
15
章继续讲解类型提示。
第四部分 控制流
第四部分涵盖
Python
中除条件判断
、循环和子程序（
subroutine
）等传统的控制流以外
的语言结构和库。先讲生成器（
generator
）
，再讲上下文管理器（
context manager
）和
协程（
coroutine
）
，还涉及新增的功能强大但不容易理解的
yield from
句法。第
18
章
有一个重要的示例：在一个简单的函数式语言的解释器中使用模式匹配。新增的第
19
章概述
Python
并发和并行处理的各种方案及其局限性
，以及使
Python Web
应用程序具
有良好伸缩性能的软件架构。为了强调语言核心功能，例如
await
、
async dev
、
async
for
和
async ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.