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  • Book Overview & Buying Getting Started with Python and Raspberry Pi (Redirected from Learning Python By Developing Raspberry Pi Applications)
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Getting Started with Python and Raspberry Pi (Redirected from Learning Python By Developing Raspberry Pi Applications)

Getting Started with Python and Raspberry Pi (Redirected from Learning Python By Developing Raspberry Pi Applications)

By : Nixon
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Getting Started with Python and Raspberry Pi (Redirected from Learning Python By Developing Raspberry Pi Applications)

Getting Started with Python and Raspberry Pi (Redirected from Learning Python By Developing Raspberry Pi Applications)

3 (1)
By: Nixon
Buy this Book

Overview of this book

The Raspberry Pi is one of the smallest and most affordable single board computers that has taken over the world of hobby electronics and programming, and the Python programming language makes this the perfect platform to start coding with. The book will start with a brief introduction to Raspberry Pi and Python. We will direct you to the official documentation that helps you set up your Raspberry Pi with the necessary equipment such as the monitor, keyboard, mouse, power supply, and so on. It will then dive right into the basics of Python programming. Later, it will focus on other Python tasks, for instance, interfacing with hardware, GUI programming, and more. Once you get well versed with the basic programming, the book will then teach you to develop Python/Raspberry Pi applications. By the end of this book, you will be able to develop Raspberry Pi applications with Python and will have good understanding of Python programming for Raspberry Pi.
Table of Contents (13 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Your First Steps with Python on the Pi
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1. Your First Steps with Python on the Pi
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Installing and setting up Raspbian
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The Python development tools
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Running some simple Python scripts
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Summary
2
2. Understanding Control Flow and Data Types
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2. Understanding Control Flow and Data Types
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Data in Python
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Control flow operators
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Using functions
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Summary
3
3. Working with Data Structures and I/O
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3. Working with Data Structures and I/O
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Data structures
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Input/output
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Summary
4
4. Understanding Object-oriented Programming and Threading
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4. Understanding Object-oriented Programming and Threading
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Object-oriented programming
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Classes in Python
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Threading
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Summary
5
5. Packaging Code with setuptools
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5. Packaging Code with setuptools
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Using packages in your Python code
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Packaging your own Python modules
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Summary
6
6. Accessing the GPIO Pins
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6. Accessing the GPIO Pins
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Digital electronics
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The GPIO library
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Universal Asynchronous Receiver/Transmitter (UART)
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Additional libraries
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Summary
7
7. Using the Camera Module
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7. Using the Camera Module
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Setting up the camera module
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Installing and testing the Python library
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Writing applications for the camera
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Summary
8
8. Extracting Data from the Internet
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8. Extracting Data from the Internet
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Using urllib2 to download data
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Parsing JSON APIs
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Parsing XML APIs
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Parsing a web page using BeautifulSoup
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Summary
9
9. Creating Command-line Interfaces
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9. Creating Command-line Interfaces
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Unit conversion application
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Command-line interface
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Summary
10
10. Debugging Applications with PDB and Log Files
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10. Debugging Applications with PDB and Log Files
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The Python debugger
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Writing log files
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Unit testing
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Summary
11
11. Designing Your GUI with Qt
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11. Designing Your GUI with Qt
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Setting up the codebase
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Building the UI with Qt Designer
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Writing the UI code
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Launching the UI
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Packaging the code
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Summary
12
Index
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Index

Parsing a web page using BeautifulSoup

In this section, we will use the BeautifulSoup library to parse an HTML web page to extract information from it. This is particularly useful for when you wish to interact with a web page that does not provide an API to access their data, with the drawback being that it is more likely that an application using this method will be broken by a change in the web page structure (rather than an API, which is rarely changed, and when they are, developers are typically given warning of such a change).

In this next example, we will write a simple script to download low resolution previews of images from Pixiv (www.pixiv.net). This script will start in a similar way to the others we have written so far. Note that the UTF-8 character encoding is required here as the contents of the web pages are likely to contain Japanese characters.

# -*- coding: utf-8 -*-
from bs4 import BeautifulSoup
import urllib2
import os
import sys
from string import Template

This string template...

Visually different images
CONTINUE READING
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Programming languages
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Getting Started with Python and Raspberry Pi (Redirected from Learning Python By Developing Raspberry Pi Applications)
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