本次实战内容是受到Javascript的启发，将Python为人诟病已久的lambda函数改成Javascript风格的箭头函数

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Python iterables

Introduction

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What is a REST API?

enum 是一组绑定到唯一常数值的符号名称，并且具备可迭代性和可比较性的特性。我们可以使用 enum 创建具有良好定义的标识符，而不是直接使用魔法字符串或整数，也便于开发工程师的代码维护。 创建枚举

Python logging 模块定义了为应用程序和库实现灵活的事件日志记录的函数和类。 程序开发过程中，很多程序都有记录日志的需求，并且日志包含的信息有正常的程序访问日志还可能有错误、警告等信息输出

在本节中继续介绍 Python 提供的常用模块 random 模块，它的主要功能是用来生成伪随机数的。 random 模块 Python 提供的 random 模块实现了各种分布式的伪随机数生成器。该

queue 模块即队列，特别适合处理信息在多个线程间安全交换的多线程程序中。下面我们对 queue 模块进行一个详细的使用介绍。 1 queue 模块定义的类和异常 queue 模块定义了以下四种不同

1. 简介 “sys”即“system”，“系统”之意。该模块提供了一些接口，用于访问 Python 解释器自身使用和维护的变量，同时模块中还提供了一部分函数，可以与解释器进行比较深度的交互。 2.