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

Logical operators


Logical operators are used to check different conditions and execute the code accordingly. For example, detecting a button interfaced to the Raspberry Pi's GPIO being pressed and executing a specific task as a consequence. Let's discuss the basic logical operators:

  • EQUAL: The EQUAL (==) operator is used to compare if two values are equal:
       >>>3==3 
       True 
       >>>3==2 
       False
  • NOT EQUAL: The NOT EQUAL (!=) operator compares two values and returns True if they are not equal:
       >>>3!=2 
       True 
       >>>2!=2 
       False
  • GREATER THAN: This operator (>) returns True if one value is greater than the other value:
       >>>3>2 
       True 
       >>>2>3 
       False
  • LESS THAN: This operator compares two values and returns True if one value is smaller than the other:
       >>>2<3 
       True 
       >>>3<2 
       False
  • GREATER THAN OR EQUAL TO (>=): This operator...