Starting with Python Strings, Files, and Menus | Raspberry Pi cookbook for Python programmers

Sign In Start Free Trial

Book Overview & Buying
Table Of Contents
Feedback & Rating

Raspberry Pi cookbook for Python programmers

4.8 (13)

Raspberry Pi cookbook for Python programmers

4.8 (13)

Overview of this book

Raspberry Pi Cookbook for Python Programmers

Raspberry Pi Cookbook for Python Programmers

Credits

Credits

About the Author

About the Author

About the Reviewers

About the Reviewers

www.PacktPub.com

www.PacktPub.com

Preface

Preface

Free Chapter

Getting Started with a Raspberry Pi Computer

Getting Started with a Raspberry Pi Computer

Introduction

Connecting the Raspberry Pi

Using NOOBS to set up your Raspberry Pi SD card

Networking and connecting your Raspberry Pi to the Internet via the LAN connector

Configuring your network manually

Networking directly to a laptop or computer

Networking and connecting your Raspberry Pi to the Internet via a USB Wi-Fi dongle

Connecting to the Internet through a proxy server

Connecting remotely to the Raspberry Pi over the network using VNC

Connecting remotely to the Raspberry Pi over the network using SSH (and X11 Forwarding)

Sharing the home folder of the Raspberry Pi with SMB

Keeping the Raspberry Pi up to date

Starting with Python Strings, Files, and Menus

Starting with Python Strings, Files, and Menus

Introduction

Working with text and strings

Using files and handling errors

Creating a boot-up menu

Creating a self-defining menu

Using Python for Automation and Productivity

Using Python for Automation and Productivity

Introduction

Using Tkinter to create graphical user interfaces

Creating a graphical application Start menu

Displaying photo information in an application

Organizing your photos automatically

Creating Games and Graphics

Creating Games and Graphics

Introduction

Using IDLE3 to debug your programs

Drawing lines using a mouse on Tkinter Canvas

Creating a bat and ball game

Creating an overhead scrolling game

Creating 3D Graphics

Creating 3D Graphics

Introduction

Starting with 3D coordinates and vertices

Creating and importing 3D models

Creating a 3D world to roam in

Building 3D maps and mazes

Using Python to Drive Hardware

Using Python to Drive Hardware

Introduction

Controlling an LED

Responding to a button

A controlled shutdown button

The GPIO keypad input

Multiplexed color LEDs

Sense and Display Real-world Data

Sense and Display Real-world Data

Introduction

Using devices with the IC bus

Reading analog data using an analog-to-digital converter

Logging and plotting data

Extending the Raspberry Pi GPIO with an I/O expander

Sensing and sending data to online services

Creating Projects with the Raspberry Pi Camera Module

Creating Projects with the Raspberry Pi Camera Module

Introduction

Getting started with the Raspberry Pi camera module

Using the camera with Python

Generating a time-lapse video

Creating a stop frame animation

Making a QR code reader

Building Robots

Building Robots

Introduction

Building a Rover-Pi robot with forward driving motors

Using advanced motor control

Building a six-legged Pi-Bug robot

Avoiding objects and obstacles

Getting a sense of direction

Interfacing with Technology

Interfacing with Technology

Introduction

Automating your home with remote sockets

Using SPI to control an LED matrix

Communicating using a serial interface

Controlling the Raspberry Pi over Bluetooth

Controlling USB devices

Hardware and Software List

Hardware and Software List

Introduction

General component sources

Hardware list

Software list

Index

Index

Customer Reviews

4.8 (13)

5 star

76.9%

4 star

23.1%

3 star

0%

2 star

0%

1 star

0%

Using files and handling errors

In addition to easy string handling, Python allows you to read, edit, and create files easily. So, by building upon the previous scripts, we can make use of our encryptText() function to encode whole files.

Since reading and writing to files can be quite dependent on factors that are outside of the direct control of the script, such as if the file we are trying to open exists or if the filesystem has space to store a new file, we will also take a look at how to handle exceptions and protect operations that may result in errors.

Getting ready

The following script will allow you to specify a file through the command line, which will be read and encoded to produce an output file. Create a small text file named infile.txt and save it so that we can test the script. It should include a short message like the following:

This is a short message to test our file encryption program.

How to do it…

Create the fileencrypt.py script using the following code:

#!/usr/bin/python3...

Visually different images

CONTINUE READING

83

Tech Concepts

36

Programming languages

73

Tech Tools

Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.

Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.

50+ new titles added per month and exclusive early access to books as they are being written.

Raspberry Pi cookbook for Python programmers

Search

Your notes and bookmarks