Python与Raspberry Pi入门：设计与应用开发指南
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"《入门Python与树莓派：设计与实现》是一本由Dan Nixon所著的指南，旨在帮助读者在树莓派(Raspberry Pi)平台上开发和实施可靠的Python应用。该书深入讲解了如何利用外部库、树莓派的通用输入输出(GPIO)接口以及相机模块，使读者能够充分利用这个小巧却功能强大的微型计算机。通过本书，读者将学习如何构建实用的应用程序，包括但不限于硬件控制、数据采集和图像处理等。
书中涵盖了以下关键知识点：
1. **Python基础**：对于初学者，章节会从Python语言的基础概念入手，包括变量、数据类型、控制结构、函数和模块，确保读者对编程语言有扎实的理解。
2. **树莓派环境设置**：介绍了如何安装和配置Python环境，以及如何连接树莓派与电脑，以便进行开发工作。
3. **GPIO接口**：讲解了树莓派GPIO（General Purpose Input/Output）接口的工作原理，以及如何编写Python代码来控制外设，如LED灯、蜂鸣器等。
4. **外部库使用**：书中推荐并详细展示了各种实用的Python库，如NumPy、Pandas、OpenCV等，这些库可以用于数据分析、图形处理、物联网(IoT)应用等。
5. **相机模块**：利用树莓派内置或扩展的相机模块，作者展示了如何捕捉和处理图像，以及开发基于视觉的项目，如人脸识别或物体检测。
6. **实战项目示例**：书中提供了多个实际项目案例，如智能家居控制系统、简单游戏开发等，让读者在实践中加深理解。
7. **版权与免责声明**：强调了版权保护，并提醒读者未经许可不得复制、存储或传输书中的内容，同时也明确了出版商和作者不会对因使用本书信息导致的任何损害负责。
通过阅读《入门Python与树莓派》，读者不仅可以提升编程技能，还能体验到树莓派在物联网和微型计算领域的广泛应用潜力。这本书适合想要踏入树莓派世界的初学者和有一定Python基础的工程师，无论你是电子爱好者、DIY爱好者还是系统集成者，都能从中找到有价值的知识和实践经验。"
Preface
[ vii ]
Who this book is for
This book is designed for those who are unfamiliar with the art of Python development
and want to get to know their way around the language and the many additional
libraries that allow you to get a full application up and running in no time.
Conventions
In this book, you will nd a number of styles of text that distinguish between
different kinds of information. Here are some examples of these styles, and an
explanation of their meaning.
Code words in text, database table names, folder names, lenames, le extensions,
pathnames, dummy URLs, user input, and Twitter handles are shown as follows:
"We can include other contexts through the use of the
include directive."
A block of code is set as follows:
flan = "495"
flan
type(flan)
flan_i = int(flan)
flan_i
type(flan_i)
Any command-line input or output is written as follows:
sudo python setup.py install
New terms and important words are shown in bold. Words that you see on the
screen, in menus or dialog boxes for example, appear in the text like this: "Next we
will disable the LineEdit widget that will be used for displaying the result of a unit
conversion, this is done by selecting the widget and removing the tick in the enabled
property in the Property Editor as shown in the following screenshot."
Warnings or important notes appear in a box like this.
Tips and tricks appear like this.
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