本书介绍如何结合Python进行网络爬虫程序的开发，从Python语言的基本特性入手，详细介绍了Python网络爬虫开发的各个方面，涉及HTTP、HTML、JavaScript、正则表达式、自然语言处理、数据科学等不同领域的内容。全书共10章，包括Python基础知识、网站分析、网页解析、Python文件读写、Python与数据库、AJAX技术、模拟登录、文本与数据分析、网站测试、Scrapy爬虫框架、爬虫性能等多个主题。本书可作为高等职业院校计算机类专业的专业课教材，也可供计算机相关从业人员选用参考。

项目一 Python 基础认知 ····················································································.1
任务一 Python 概述 ·······································································································.1
一、Python 简介 ······································································································.1
二、安装Python ······································································································.2
三、安装PyCharm ···································································································.6
四、Python 语法规范 ·······························································································.11
任务二 Python 命令的组成 ·····························································································.13
一、基本符号 ·········································································································.14
二、常量与变量 ······································································································.16
三、数据类型 ·········································································································.19
四、功能符号 ·········································································································.24
任务三 程序结构 ·········································································································.26
一、表达式语句 ······································································································.26
二、顺序结构 ·········································································································.27
三、选择结构 ·········································································································.28
四、循环结构 ·········································································································.30
五、条件表达式 ······································································································.31
六、程序的流程控制 ···················································