- Learn Python -
2 in 1 Theory and Practice
The Crash Course of Choice for Beginners to Learn Python
Coding Well in 1 Week with Hands-On Exercises
by
Daniel Bresler
2020 Copyright
Table of Contents
Copyright, Legal Notice and Disclaimer
Copyright 2020 - All rights reserved
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Chapter 1: Intro to Python
This book is about Python for beginners. It introduces the core aspects of the Python programming language. Python is a high-level, integrated, general-purpose programming language developed in 1991 by Guido van Rossum. The design philosophy underpinning Python emphasizes on code readability characterized by its use of considerable whitespace. Pythons object-oriented approach and language constructs focus on helping programmers write logical, clear code for large and small-scale projects. This book aims to provide a cogent introduction to python for beginners. It seeks to provide a platform to learn python programming well and in one week including step by step practical examples, exercises and tricks.
Before we go into the' why programming' discussion first let us knows what programming is. Programming is the process of taking an equation and converting it into a code, a programming language, so that it is implemented on a machine. Or in simple words, "Programming is a language to teach a machine what to do through a set of instructions." Various types of programming languages are used, for example:
Python
PHP
C language
JAVA and more.
So why is it important? What's so Great about this? Why does it matter?
The first thing, everything is done on computers in today's world; from sending an email / report to a distant colleague / friend / relative or even as simple as a picture to having an important meeting on Skype! It has become a necessity for every single individual to have a computer / laptop as it is fast, very reliable and easy to use. So when computers are part of your life, it's said that learning to program will boost your life! One of the main reason people are learning programming is because they want to make a career by creating websites for companies or mobile apps. That is not the only reason you need to learn programming; programming can also help to improve a person's efficiency and productivity!
What is Python?
Python is a multi-purpose language created by Guido van Rossum. Differently from HTML, CSS, and JavaScript, Python can be used for multiple types of programming and software development. Python can be used for things like:
The reasons why Python is the go to language for many can be summarized in the following points:
Beginner Friendliness as it reads like almost English
Very no hard rules on how to build features
Easier to manager error
Many and big supporting communities
Careers opportunities
Future especially for the strong fit towards Data Science and Machine Learning Applications.
Python is one of the most powerful programming/coding languages. Its one of the programming languages that are interpreted rather than compiled. This means the Python Interpreter works or operates on Python programs to give the user the results. The Python Interpreter works in a line-by-line manner. With Python, one can do a lot. Python has been used for the development of apps that span a wide of fields, from the most basic apps to the most complex ones. Python can be used for development of the basic desktop computer applications. It is also a good coding language for web development. Websites developed with Python are known for the level of security and protection they provide, making them safe and secure from hackers and other malicious users. Python is well applicable in the field of game development. It has been used for the development of basic and complex computer games. Python is currently the best programming language for use in data science and machine learning. It has libraries that are best suitable for use in data analysis, making it suitable for use in this field. A good example of such a library is scikit-learn (sklearn) which has proved to be the best for use in data science and machine learning.
Python is well known for its easy-to-use syntax. It was written with the goal of making coding easy. This has made it easy the best language even for beginners. Its semantics are also easy, making it easy for one to understand Python codes. The language has received a lot of changes and improvements, especially after the introduction of Python 3. Previously, we had Python 2.7 which had gained much stability. Python 3 brought in new libraries, functions, and other features, and some of the languages construct where changed significantly.
Features of Python
Python is Easy
Python is an easy language to get started with. The ease of use is underscored by the fact that most of the programs written in python look similar to the English language. Therefore, this simplicity makes python an ideal learning language for entry-level programming courses, and thus introducing programming concepts to students.
Python is Portable/Platform Independent
Python is massively portable, which means that Python programs can be run in various different operating systems without needed specific or extensive changes.
Python is an Interpreted Language
Mainly, Python is an interpreted language as opposed to being a compiled language on the other hand, C, C++ are examples of complied languages.
In many cases, the programs composed in a high-level language are typically referred to as source code or source programs. As a result, the commands in the source codes are referred to as statements. A computer lacks the capacity to execute a program written in high-level language. Typically, computers understand machine language, which comprises of 1s and 0s only.
As a result, there are two types of program available to users when translating high-level languages to machine languages: compiler and interpreter.
Compiler
In its operative function, a complier translates the entire source code into the readable machine language in one swoop. The machine language is subsequently executed. The process is illustrated below:
