Book Image

Python Programming with Raspberry Pi

By : Sai Yamanoor, Srihari Yamanoor
Book Image

Python Programming with Raspberry Pi

By: Sai Yamanoor, Srihari Yamanoor

Overview of this book

Raspberry Pi Zero is a super-small and super-affordable product from Raspberry Pi that is packed with a plethora of features and has grabbed the notice of programmers, especially those who use Python. This step-by-step guide will get you developing practical applications in Python using a Raspberry Pi Zero. It will become a valuable resource as you learn the essential details of interfacing sensors and actuators to a Raspberry Pi, as well as acquiring and displaying data. You will get started by writing a Python program that blinks an LED at 1-second intervals. Then you will learn to write simple logic to execute tasks based upon sensor data (for example, to control a motor) and retrieve data from the web (such as to check e-mails to provide a visual alert). Finally, you will learn to build a home automation system with Python where different appliances are controlled using the Raspberry Pi. The examples discussed in each chapter of this book culminate in a project that help improve the quality of people’s lives.
Table of Contents (17 chapters)
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

PEP8 style guide for Python


PEP8 is a style guide for Python that helps programmers write readable code. It is important to follow certain conventions to make our code readable. Some examples of coding conventions include the following:

  • Inline comments should start with a and be followed by a single space.
  • Variables should have the following convention: first_var.
  • Avoiding trailing whitespaces on each line. For example, if name == "test": should not be followed by whitespaces.

Note

You can read the entire PEP8 standards at https://www.python.org/dev/peps/pep-0008/#block-comments.

Verifying PEP8 guidelines

There are tools to verify PEP8 standards of your code. After writing a code sample, ensure that your code adheres to PEP8 standards. This can be done using the pep8 package. It can be installed as follows:

pip3 install pep8

Let's check whether one of our code samples has been written according to the PEP8 convention. This can be done as follows:

pep8 opencv_test.py

The check indicated the following...