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

Reading inputs from the user


In the previous chapter, we printed something on the screen for the user. Now, we will discuss a simple program where we ask the user to enter two numbers and the program returns the sum of two numbers. For now, we are going to pretend that the user always provides a valid input.

In Python, user input to a Python program can be provided using the input() function (https://docs.python.org/3/library/functions.html#input):

    var = input("Enter the first number: ")

In the preceding example, we are making use of the input() function to seek the user's input of the number. The input() function takes the prompt ("Enter the first number: ") as an argument and returns the user input. In this example, the user input is stored in the variable, var. In order to add two numbers, we make use of the input() function to request user to provide two numbers as input:

    var1 = input("Enter the first number: ") 
    var2 = input("Enter the second number: ") 
    total = int(var1...