Learn Python Programming Step by Step
Python today stands amongst the top 5 most popular and practical programming languages as per the latest TIOBE Index. It is a multipurpose, high-level, object-oriented, interactive, interpreted and extremely user-friendly programming language.
Being interactive means that you can type the code straight in Python console which then interacts with the interpreter for execution. It proposes a simple coding style which makes it the preferred language for everyone planning to begin his or her career in programming.
Not only Python is the 4th most popular language as per TIOBE index but also the 3rd highest earning programming language. Please refer to the above developer's salaries chart.
Python has applications in a variety of areas be they are desktop apps, web apps, data mining or machine learning.
You can make websites, create games, use it for web scrapping, robotics, and browser automation i.e. using Selenium with Python. And almost everything that any object-oriented programming language can do
Let's first get some background before you further dive into reading the Python tutorial. It is always propitious to know about the tool which you are planning to learn.
Python is a general-purpose programming language which began as a solution to automate system level tasks in its early phases. However, soon, it became quite famous due to its extensive application development support. It allowed creating websites with a backend, GUI tools using PyQt/Tkinter, predicting stocks using machine learning (libraries like scikit-learn), data analysis using Pandas modules and game development with PyGame.
Python is easy to learn, highly readable, and simple to use. It has a clean and english-like syntax which requires less coding and let the programmer focus on the business logic rather than thinking about the nitty-gritty of the syntax.
Python - A Sneak View in the History.
It was a Dutch programmer, Guido Van Rossum, who wrote Python as a hobby programming project back in the late 1980s. Since then it has grown to become one of the most polished languages of the computing world.
What Led Guido to Create Python?
In his own words, Guido revealed the secret behind the inception of Python. He started working on it as a weekend project utilizing his free time during Christmas in Dec'1989. He originally wanted to create an interpreter, a descendant of the ABC programming language which he was a contributing developer. And we all know that it was none other than Python which gradually transformed into a full-fledged programming language.
How the Name Python Came About?
Guido initially thought the Unix/C hackers to be the target users of his project. And more importantly, he was fond of watching the famous comedy series [The Monty Python's Flying Circus]. Thus, the name Python struck his mind as not only has it appealed to his taste but also to his target users.
Python Programming Silent Features.
☛ Code Quality.
Python code is highly readable which makes it more reusable and maintainable. It has broad support for advanced software engineering paradigms such as object-oriented (OO) and functional programming.
☛ Developer Productivity.
Python has a clean and elegant coding style. It uses an english-like syntax and is dynamically typed. So, you never declare a variable. A simple assignment binds a name to an object of any type. Python code is significantly smaller than the equivalent C++/Java code. It implies there is less to type, limited to debug, and fewer to maintain. Unlike compiled languages, Python programs don't need to compile and link which further boosts the developer speed.
☛ Code Portability.
Since Python is an interpreted language, so the interpreter has to manage the task of portability. Also, Python's interpreter is smart enough to execute your program on different platforms to produce the same output. So, you never need to change a line in your code.
☛ Built-in and External Libraries.
Python packages a large no. of the prebuilt and portable set of libraries. You can load them as and when needed to use the desired functionality.
☛ Component Integration.
Some applications need interaction across different components to support the end to end workflows. Onc such component could be a Python script while other be a program written in languages like Java/C++ or any other technology.
Python has several ways to support the cross-application communication. It allows mechanisms like loading of C and C++ libraries or vice-versa, integration with Java and DotNET components, communication using COM/Silverlight, and interfacing with USB devices over serial ports. It can even exchange data over networks using protocols like SOAP, XML-RPC, and CORBA.
☛ Free to Use, Modify and Redistribute.
Python is an OSS. You are free to use it, make amends in the source code and redistribute, even for commercial interests. It is because of such openness that Python has garnered a large community base which is continually growing and adding value.
☛ Object-oriented from the Core.
Python primarily follows an object-oriented programming (OOP) design. OOP provides an intuitive way of structuring your code, and a solid understanding of the concepts behind it can let you make the most out of your coding. With OOP, it is easy to visualize the complex problem into smaller flows by defining objects and how they correlate. And then we can form the actual logic to make the program work.