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Python Programming for Beginners
A Step-by-Step Guide to Learning the Basics of Computer Programming and Python Computer Language
Copyright 2015 Corey Kidd - All rights reserved
This document is geared towards providing exact and reliable information in regards to the topic and issue covered. The publication is sold with the idea that the publisher is not required to render accounting, officially permitted, or otherwise, qualified services. If advice is necessary, legal or professional, a practiced individual in the profession should be ordered.
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Table of Contents
Introduction
Thank you for purchasing this book and welcome to the wonderful world of computer programming! If this is your first step into computer programming then you have made a great choice in buying this book. Within these pages we will get you up and running with a brilliant programming language that you can use to create great programs.
Before we move into learning the language, lets learn a bit more about what Python is and why you should learn how to use it.
What Is Python
Python is high-level programming language which was created in the late 1980's by Guido van Rossum. It was named as a homage to the world famous British comedy group Monty Python. Python places huge emphasis on simplicity and code readability, making it easy to create applications quickly. This ease and speed makes Python a brilliant language for you to start off with.
High-level programming languages allow you to write computer programs in a language closer to human languages than computer code. Other high-level programming languages include C, BASIC and Pascal. In order to run programs developed in high-level programming languages need to be converted into machine code. To run and test Python games you will need to install the Python interpreter, which does that for you.
When you come to release your program to the world you can find many tools to package up your program into a stand-alone file. This means that you people can run your programs without installing the Python interpreter on your computer.
Why Should You Learn Python
As we mentioned in the last section, there are a lot of high-level programming languages. If you were old enough to have owned a Commodore 64 then you'll remember that BASIC used to come packaged with the computer itself. If you have researched game development then you'll also know that many people use C++ and Java to develop games.
It is often very difficult to decide which language to start with because there is so much choice out there. The good news is that all of the languages are very, very similar to each other. If you have used BASIC or C in the past then you will recognize many of the statements in Python and will many parts of it incredibly familiar. The differences in the languages are within the syntax (structure of statements) and the choice of libraries (pre-written codes and resources to extend the functionality) available.
Once you learn one language really well, it is easier to learn other languages quickly. When it comes to learning your first language you need to find a language which is powerful and easy to learn. You don't want to learn one language then find out that it is unable to produce the programs you want it to.
Python is a brilliant language to start off with because it is both easy to pick up and incredibly powerful. Python is easy to pick up because it is simple, it usually takes a lot less code to develop a program in Python than it would take to develop a similar program in C++. This means that it will be easier for you to learn and quicker for you to develop programs with Python than other programming languages. It also means you are less likely to make mistakes and easier for you to find out where the mistakes are, which is often one of the toughest things for programmers to do.
Python is also incredibly versatile. You can use it for anything from desktop applications to games and you can also develop applications for mobiles too. You can find a lot of libraries which will allow you to extend the functionality of the language itself. So even though the language might not have the initial capability to carry out certain tasks, you will almost always be able to find a library which does exactly what you need.
Finally, Python is cross-platform which means that you can write your code for one platform and it will work the same on all of the other platforms. This makes things much easier for you if you want to port your program to each of the Windows, Linux and Mac platforms. You won't need to write the code 3 times for 3 different platforms and it also makes testing the program a lot easier too.
Ready to Start?
Sold on Python yet? Excited to get started? You really should be!
Over the next few pages you will set up Python and then will start to program!
Chapter One: Setting Up Python
In this chapter, you will learn:
- How to download and install the Python interpreter
- How to use the Python Shell
Before you do any programming you need to get Python set up on your computer. In this book we will teach you how to program in Python 3, which is the latest version of the software. If you need to use Python 2 in the future then that is fine, both versions of Python are very similar. If you learn Python 3 then you should have no problem understanding Python 2.
In order to download and install the interpreter for Python you just visit https://www.python.org/downloads/ . It will give you an option of the different versions at the top of the page. You just need to choose the latest Python 3 version, click on it and then download it.
If you need a different version of Python then you just need to scroll down the page and choose the version you want to use.
Once you've downloaded the version of Python you need then all you need to do is install it, then we will be ready to start coding.
We are going to do all of our coding on the IDLE ( I ntegrated D eve L opment E nvironment) program which comes with Python. IDLE is created to be a very simple IDE and it is something you may have seen before if you use Linux as it is bundled with many Linux programs. IDLE was fully coded in Linux and is created to be very easy for beginners to use.
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