Python网络爬虫
正版保障 假一赔十 可开发票
￥ 32.34 6.6折 ￥ 49 全新
库存59件
广东广州
认证卖家担保交易快速发货售后保障
作者耿兴隆，胡钟月，周祥主编
出版社电子工业出版社
ISBN9787121438103
出版时间2023-03
装帧平装
开本其他
定价49元
货号12269067
上书时间2024-08-27
商品详情
- 品相描述：全新
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作者简介
耿兴隆，男，副教授，硕士研究生，现任职于河北软件职业技术学院，负责产教融合实训基地实训室。曾赴赴加拿大圣劳伦斯学院深度访问和研修。主持多个省级、校级研究课题。
目录
目录 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 ································································································.32 项目实战 ·····················································································································.33 实战 输出百度网址 ································································································.33 项目二 网络爬虫基础认知 ················································································.35 任务一 网络爬虫概述 ···································································································.35 一、网络爬虫的基本原理 ··························································································.36 二、网络爬虫系统框架 ·····························································································.37 三、爬行策略 ·········································································································.37 四、网络爬虫的分类 ································································································.38 五、开源网络爬虫框架/项目 ······················································································.39 任务二 HTTP ·············································································································.41 一、HTTP 的工作原理 ·····························································································.41 二、Urllib 模块库 ···································································································.42 三、URL 定义 ·······································································································.43 四、URL 编码设置 ·································································································.47 任务三 网页请求过程 ···································································································.50 一、发送请求报文 ··································································································.51 二、返回响应 ········································································································.52 三、HTTP 消息 ······································································································.53 项目实战 ·····················································································································.54 实战一 搜索商品网址 ····························································································.54 实战二 搜索食品价格网址 ······················································································.56 项目三 Urllib 请求模块库的应用 ········································································.58 任务一 发送网页请求 ···································································································.58 一、基本HTTP 请求 ·······························································································.58 二、Request 网络请求 ·····························································································.66 三、设置请求头 ·····································································································.67 四、Handler 方法发送请求 ·······················································································.69 五、设置代理IP ····································································································.71 六、身份验证 ········································································································.73 任务二 网页下载 ·········································································································.77 一、网页结构 ········································································································.77 二、写入网页文件 ··································································································.77 三、网页文件下载 ··································································································.79 项目实战 ·····················································································································.82 实战一 下载Python 学习网址 ··················································································.82 实战二 下载公司网页HTML 文件 ············································································.85 项目四 安装Urllib3 请求模块库并发送请求 ··························································.87 任务一 安装Urllib3 请求模块库 ······················································································.87 一、安装Anaconda ·································································································.87 二、安装Urllib3 模块库 ···························································································.92 任务二 发送请求 ·········································································································.95 一、创建代理对象 ··································································································.96 二、请求方法 ········································································································.98 三、定义请求头 ·····································································································.99 四、设置代理IP ···································································································.101 五、自动重试 ·······································································································.102 六、重定向 ··········································································································.103 项目实战 ····················································································································.104 实战 发送请求访问淘宝 ························································································.104 项目五 Requests 请求模块库的应用 ·································································.106 任务一 网页请求 ·······································································································.106 一、标准的HTTP 请求 ···························································································.107 二、返回响应消息 ·································································································.109 三、JSON 格式数据 ·······························································································.114 任务二 发送请求方法 ·································································································.117 一、发送GET 请求方法 ·························································································.118 二、发送POST 请求方法 ························································································.120 三、其他请求方法 ·································································································.125 任务三 复杂网络请求 ·································································································.126 一、复杂请求头 ····································································································.126 二、上传文件 ·······································································································.129 三、Cookies 验证 ··································································································.131 四、会话保持 ·······································································································.131 任务四 异常处理 ·······································································································.133 一、try-except 语句 ································································································.133 二、Urllib 异常处理模块 ·························································································.134 三、Urllib3 异常处理模块 ·······················································································.135 四、request 异常处理模块 ·······················································································.135 项目实战 ···················································································································.138 实战 爬取豆瓣很受欢迎的影评网址 ·········································································.138 项目六 解析网页 ········
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