Python Overview – The difference between Python 2 and Python 3

Python Programming Overview

PYTHON PROGRAMMING is a high-level scripting language that is interpreted, can be used interactively, and is an object-oriented scripting language. And in this Python Programming Overview, Python is made easy to understand. It uses English keywords a lot and has fewer syntactical constructions than other languages.

Python Overview
Python Overview

What is Python Programming?

  • Python is Interpreted – This is because the interpreter processes Python code at runtime. There is no mandatory compilation step before running your code. The similarities between PERL and PHP are clear.
  • Python is Interactive – You can write programs in Python by entering commands at a prompt and interacting directly with the interpreter.
  • Python is Object-Oriented – Python is compatible with the Object-Oriented programming paradigm, which is a way of writing programs in which functions are hidden away in objects.
  • Python is a Beginner’s Language – Python is an excellent programming language for novices because it allows for the creation of a wide variety of programs, from text processors to web browsers to games.

The difference between Python 2 and Python 3

The Python overview gives justification for the difference between Python 2 and Python 3. Python 3 has a type system and is increasingly in demand while Python 2 employs an obsolete syntax for the print function. Python 2 is still utilized for configuration management in DevOps, although Python 3 is now the preferred language. Python programming is a popular language for beginners to learn.

Overview of the Python 2 and 3 Comparison

This table presents the overview of the Python 2 and Python 3 comparison. It has the complete information needed to see the difference between the two versions of Python Programming.

Comparison ParameterPython 2Python 3
Year of ReleasePython 2 was first released in 2000.Python 2 was first released in 2008.
“Print” Keywordprint is considered a statement and not a function in Python 2.print is considered a function and not a statement in Python 3.
Storage of StringsBy default, strings are stored as ASCII in Python 2.By default, strings are stored as UNICODE in Python 3.
Division of IntegersPython 2 divides two integers and returns an integral value. For example, 7/2 returns 3 in Python 2.In Python 3, the division of two integers yields a floating-point number. For example in Python 3, 7/2 returns 3.5.
ExceptionsIn Python 2, exceptions are surrounded by brackets.Parentheses surround exceptions in Python 3.
Variable leakageIf global variables are utilized within a for-loop in Python 2, their values will change.In Python 3, variable values never change.
IterationIn Python 2, the xrange() method for iterations has been defined.In Python 3, the new Range() method for iteration was introduced.
Ease of SyntaxPython 2 has a syntax that is more complex than Python 3.Python 3 has a simpler syntax than Python 2.
LibrariesMany Python 2 libraries are not forward compatible.Numerous Python 3 libraries are produced for usage exclusively with Python 3.
Usage in today’s timesSince 2020, Python 2 is no longer in use.Python 3 is currently more popular than Python 2 and is still in use.
Backward compatibilityCodes written in Python 2 can be transferred to Python 3 with much effort.Python 3 is not compatible backward with Python 2.
ApplicationFor the most part, Python 2 was used to become a DevOps Engineer. After 2020, it becomes obsolete.Python 3 is utilized in numerous industries, such as Software Engineering and Data Science.
Overview of the Python 2 and 3 Comparison

What is the main use of Python Programming?

The main use of Python Programming is a support language for building control and administration, testing, and many other purposes by software engineers. SCons for build management. Buildbot and Apache Gump for continuous compilation and testing automation. Roundup or Trac for tracking bugs and managing projects.

History of Python Programming

The History of Python Programming started in the late nineteen-eighties (1980s) and was created by Guido van Rossum, and the development of the language began in December nineteen eighty-nine (1989) at CWI in the Netherlands. It was meant to be a more capable replacement for ABC that could work with the Amoeba OS.

Why you should learn Python 3 (Vide...
Why you should learn Python 3 (Video 02)

The Python programming language is protected by copyright. Python, like Perl, has had its source code released under the GNU General Public License (GPL).

Despite the fact that Guido van Rossum is still instrumental in guiding Python’s development, the language is now maintained by a core development team at the institute.

In 1991, developers made the language available to the public. At the time of its release, fewer lines of code were needed to express the same ideas as in Java, C++, or C. Additionally, the guiding principle behind its creation was sound.

A primary goal is to improve developer productivity and make code easier to read. When it was first released, it was more than capable of providing inheritance, a number of fundamental data types, exception handling, and a variety of useful built-in functions.

Many other programming languages, including Ruby, Cobra, Boo, CoffeeScript ECMAScript, Groovy, Swift Go, OCaml, Julia, etc., have drawn inspiration from Python.

Python Programming Features

Python Programming features include the following:

1. Easy-to-Learn

Python is one of the easy-to-learn programming languages used. A few days are sufficient to master the fundamentals of Python, become comfortable with its syntax, and develop simple applications. However, mastering Python and acquiring its complex principles may take some time. Python is the simplest programming language to learn and master compared to C, C++, Java, etc.

2. Easy to Read

The syntax of Python is really simple which is easy to read. It mainly consists of English-language words. Generally, the experience of creating code resembles teaching a child. In addition, unlike other programming languages (such as C, C++, Java, etc.), no opening or closing brackets are required when specifying the scope. In Python, we employ indentation (spaces or tabs) to make the code more clean and pleasing.

3. Interpreted Language

Python code is not compiled, transformed to an executable file, and then executed simultaneously. Python is an interpreted language, which means that, unlike other programming languages, its code is executed line by line. This line-by-line execution also improves code debugging.

4. Free and Open-Source

Python is a free and open-source programming language, thus it can be used without cost on any operating system and without any copyright concerns. Anyone can get Python, along with its libraries and documentation, from its official website. You can download, but you can also create and publish your own modules or libraries.

5. Object-Oriented Language

The programming paradigm of Object-Oriented Programming is founded on the ideas of classes and objects. Classes serve as blueprints for objects, which contain data and methods for manipulating that data. Object-oriented programming focuses on creating code with a high level of abstraction that is reusable. Object-Oriented programming is a crucial component of Python.

Python supports object-oriented programming constructs such as classes, data encapsulation, inheritance, and polymorphism, among others. Python facilitates the creation and utilization of classes, objects, and OOP constructs. As a result of this method, Python programs may be created that is efficient and robust.

6. Cross-Platform Language

Python is a Cross-Platform Language. Frequently, when downloading software from a website, you may have observed a list of suitable software versions for various operating systems. Python code, once written on one machine or operating system, can be run on any other machine or system.

For instance, if we created a Python program on a Mac, we may run it without modification on Linux, Windows, or any other operating system. Python code is initially translated to an intermediate form known as Bytecode before being executed.

7. Extensive Features

Python has an extensive features and is a more flexible programming language. Python proves to be a versatile language due to its adaptability to varied features, which allows it to cover a wide range of software development applications.

We can compile code in languages such as C/C++ and then use it in our Python code, which can be compiled and executed anywhere. It allows code written in other programming languages to be executed. This adds new capabilities and usefulness to Python by merging code from another programming language.

8. High-Level Language

Python is a high-level programming language, allowing users to easily write, comprehend, and interpret code. High-level programming languages allow programmers to develop machine-type-dependent code. Python is a programming language with a high level of abstraction from the low-level system or machine constructs.

The developer need not be concerned with architecture, memory management, or the underlying machine type while developing code.

9. Databases Support

The Python Support Database API (DB-API) provides an interface to practically all of the main commercial databases. Currently, almost every application we need to design requires a database. Standard Python supports databases such as MySQL, PostgreSQL, Microsoft SQL, Oracle, and Informix, among others.

We must import the database’s interface in order to utilize it. Python allows you to work with both relational and non-relational databases.

10. GUI Programming Support

Python supports graphical user interfaces or GUI. It is a fundamental component of the Python programming language. It is what we see on our computers and mobile devices. The screen has a variety of application icons, and when we open some of them, we see a nice picture that makes it easier to interact with and use them.

Python’s GUI libraries include Tkinter, PyQT5, PSide2, and others. GUI facilitates the user’s interaction with the application and the system, and GUI packages for Python allow the development of graphics-intensive software simple and quick.

11. Large Standard Library

Python is comprised of an abundance of cross-platform libraries and offers a vast array of modules and functions. These Large Standard libraries are interoperable with numerous operating systems, including UNIX, Mac, and Windows, among others.

Due to the enormous number of available libraries, we do not need to develop code for every single thing; instead, we may import and utilize the essential functionality. For instance, if you need to access certain websites and scrape data from them, you do not need to build request, response, and other functions from scratch. There are a variety of available libraries you can employ for this purpose.

If we require additional functionality, we can also install additional packages not included in the standard library.

12. Dynamic Typed Language

Python is a Dynamic Typed Language. Dynamically-typed indicates that, in contrast to other programming languages, we do not need to specify the data type (such as int, float, double, etc.) of a variable directly in Python. The variable’s data type is determined at runtime. A variable other than this one can be used to hold different types of data at various points in the program. This Python feature saves a great deal of effort and helps us avoid pitfalls that would have occurred if the datatype had to be specified directly.

Other Features of Python Programming

Python has many other features besides those already mentioned; some examples are provided below.

  • It is compatible with both Functional and Structured Programming techniques, as well as Object-Oriented Programming.
  • To create larger applications, it can be compiled to byte code or used directly as a scripting language.
  • High-level dynamic data types and dynamic type checking are both supported.
  • It has built-in garbage collection functionality.
  • All of the major programming languages, including C and C++, as well as ActiveX, CORBA, and Java, can be seamlessly integrated with it.

Summary

I am certain that you have a strong understanding of the differences between Python 2 and Python 3. And in this Python overview, the following topics were covered: What is the main use of Python programming, its history, and its features are discussed.

In the next post, Python Environment Setup, you will learn how to configure PATH and install Python. I sincerely hope that this Python overview will be of great assistance to you in your future Python programming studies.


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