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PYTHON CRASH COURSE

A Beginners Guide to Master the Basics of Python and Data Science. Learn Coding with This Machine Learning Tool. Discover the Endless Possibilities of Computers and Codes.

ERIC WALL

Copyright 2020 - All rights reserved

The content contained within this book may not be reproduced, duplicated or transmitted without direct written permission from the author or the publisher.

Under no circumstances will any blame or legal responsibility be held against the publisher, or author, for any damages, reparation, or monetary loss due to the information contained within this book. Either directly or indirectly.

Legal Notice: This book is copyright protected. This book is only for personal use. You cannot amend, distribute, sell, use, quote or paraphrase any part, or the content within this book, without the consent of the author or publisher.

Disclaimer Notice: Please note the information contained within this document is for educational and entertainment purposes only. All effort has been executed to present accurate, up to date, and reliable, complete information. No warranties of any kind are declared or implied. Readers acknowledge that the author is not engaging in the rendering of legal, financial, medical or professional advice. The content within this book has been derived from various sources. Please consult a licensed professional before attempting any techniques outlined in this book.

By reading this document, the reader agrees that under no circumstances is the author responsible for any losses, direct or indirect, which are incurred as a result of the use of information contained within this document, including, but not limited to, errors, omissions, or inaccuracies.

Table Of Contents

Introduction

L earning any programming language, including Python, opens the door to the computer world. Using programming, you can do almost everything a computer can dogiving you plenty of room to be creative. If you think of a needsay, to count the word frequency in a Harry Potter novelyou can program it yourself. If you have a good idea, such as a website for mutual learning, you can open up your computer and start writing. Once you learn to program, youll find that software is mostly about brains and time, and everything else is extremely cheap. There are many rewards to be gained for writing programs. It could be an economic return, such as a high salary or starting a publicly traded internet company. It can also be a reputational reward, such as making programming software that many people love or overcoming problems that plague the programming community. As hackers and painters put it, programmers are as much creators as painters. Endless opportunities for creativity are one of the great attractions of programming.

Programming is the basic form of human-machine interaction. People use programs to operate machines. Starting with the industrial revolution of the 18 th century, people gradually moved away from the mode of production of handicrafts and towards the production of machines. Machines were first used in the cotton industry, and the quality of the yarn produced at the beginning was inferior to that produced by hand. However, the machines can work around the clock, tirelessly, and in prodigious quantities. By the end of the 18 th century, most of the worlds cotton had become machine-made. Today, machines are commonplace in our lives. Artificial intelligence is also penetrating more and more into production and life. Workers use machines to make phones and other devices, doctors operate with machines to perform minimally invasive surgeries, and traders use machines to trade high-frequency stocks. To put it cruelly, the ability to deploy and possess machines will replace bloodlines and education as the yardstick of class distinctions in the future. This is why programming education is becoming more and more important.

Changes in the world of machines are revolutionizing the way that the world works. Repetitive work is dead, and the need for programmers is growing. A lot of people are teaching themselves to program to keep up with the latest trends. Fortunately, programming is getting easier. From assembly language to C to Python, programming languages are becoming more accessible.

CHAPTER 1:

Getting Started

B efore using Python, you first need to install and run it on your computer. Once you do that, you will be able to write your first program. Python is known as a programming platform that cuts across multiple platforms. You can use it on Linux, macOS, Windows, Java, and .NET machines freely and as an open-source resource. Most of the Linux and Mac machines come preinstalled with outdated versions. That is the main reason why you will need to install the latest, current version.

Download Python to your PC

Depending on your operating system, you might need to download the latest version of Python to your system. For PC's running on Windows OS, you can download the Windows Python interpreter from Python's website free of charge. Depending on the version of your operating system, ensure to download the appropriate version of Python that works for it. PCs running on Linux and Mac OS X already have Python pre-installed so you don't have to make any further installing asides a code editor. However, since a good many OS X and Linus systems still run the Python 2.x series, you might want to install the newer version of Python. To do this, you have to visit Python's website and download a 3.x series version appropriate for your operating system.

Install a Python interpreter

The next step is to install a Python interpreter. Do this without altering any changes to the program. From this point, Python can be integrated into your PC's Command Prompt by activating the last option on the list of available modules.

1. Test the installation by opening the command prompt on Windows and Terminal on Linux or Mac. Enter the word "Python," and click Enter . The package would load and display the version of Python you have installed. From here, the Python interpreter command prompt will load. Enter print("Hello, World!") and click enter. The text "Hello World!" should appear under the Python command line.

2. Feel free to experiment with the interpreter. Try out the functionality of codes in the interpreter before adding it to your program. Doing this can aid you in learning the workings of the commands in Python and in being able to write a throw-away program.

3. Learn the basics of how variables and objects are run on Python.

4. You can learn to use Python in carrying out simple calculator functions that will help familiarize you with the syntax of the program, as well as how strings and numbers are managed.

5. To open the interpreter, visit your command prompt center or Terminal. Enter Python into the prompt and click Enter to be directed to the Python command prompt. To execute the interpreter, you would have to manually navigate your way to the Python directory if Python isn't already integrated to your Command Prompt.

Use Python to carry out basic arithmetic problems such as addition, subtraction, multiplication, exponent, etc. This is done using operators in Python, for instance, to calculate the values of 7, 3+7, and 5^7. To calculate the following, you enter them into the prompt as follows:

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