Python Tutorial

Introduction Python Features Python Applications Python System requirements Python Installation Python Examples Python Basics Python Indentation Python Variables Python Data Types Python IDE Python Keywords Python Operators Python Comments Python Pass Statement

Python Conditional Statements

Python if Statement Python elif Statement Python If-else statement Python Switch Case

Python Loops

Python for loop Python while loop Python Break Statement Python Continue Statement Python Goto Statement

Python Arrays

Python Array Python Matrix

Python Strings

Python Strings Python Regex

Python Built-in Data Structure

Python Lists Python Tuples Python Lists vs Tuples Python Dictionary Python Sets

Python Functions

Python Function Python min() function Python max() function Python User-define Functions Python Built-in Functions Python Recursion Anonymous/Lambda Function in Python apply() function in python Python lambda() Function

Python File Handling

Python File Handling Python Read CSV Python Write CSV Python Read Excel Python Write Excel Python Read Text File Python Write Text File Read JSON File in Python

Python Exception Handling

Python Exception Handling Python Errors and exceptions Python Assert

Python OOPs Concept

OOPs Concepts in Python Classes & Objects in Python Inheritance in Python Polymorphism in Python Python Encapsulation Python Constructor Python Super function Python Static Method Static Variables in Python Abstraction in Python

Python Iterators

Iterators in Python Yield Statement In Python Python Yield vs Return

Python Generators

Python Generator

Python Decorators

Python Decorator

Python Functions and Methods

Python Built-in Functions Python String Methods Python List Methods Python Dictionary Methods Python Tuple Methods Python Set Methods

Python Modules

Python Modules Python Datetime Module Python Math Module Python Import Module Python Time ModulePython Random Module Python Calendar Module CSV Module in Python Python Subprocess Module

Python MySQL

Python MySQL Python MySQL Client Update Operation Delete Operation Database Connection Creating new Database using Python MySQL Creating Tables Performing Transactions

Python MongoDB

Python MongoDB

Python SQLite

Python SQLite

Python Data Structure Implementation

Python Stack Python Queue Python Linked List Python Hash Table Python Graph

Python Advance Topics

Speech Recognition in Python Face Recognition in Python Python Linear regression Python Rest API Python Command Line Arguments Python JSON Python Subprocess Python Virtual Environment Type Casting in Python Python Collections Python Attributes Python Commands Python Data Visualization Python Debugger Python DefaultDict Python Enumerate

Python 2

What is Python 2

Python 3

Anaconda in Python 3 Anaconda python 3 installation for windows 10 List Comprehension in Python3

How to

How to Parse JSON in Python How to Pass a list as an Argument in Python How to Install Numpy in PyCharm How to set up a proxy using selenium in python How to create a login page in python How to make API calls in Python How to run Python code from the command prompt How to read data from com port in python How to Read html page in python How to Substring a String in Python How to Iterate through a Dictionary in Python How to convert integer to float in Python How to reverse a string in Python How to take input in Python How to install Python in Windows How to install Python in Ubuntu How to install PIP in Python How to call a function in Python How to download Python How to comment multiple lines in Python How to create a file in Python How to create a list in Python How to declare array in Python How to clear screen in Python How to convert string to list in Python How to take multiple inputs in Python How to write a program in Python How to compare two strings in Python How to create a dictionary in Python How to create an array in Python How to update Python How to compare two lists in Python How to concatenate two strings in Python How to print pattern in Python How to check data type in python How to slice a list in python How to implement classifiers in Python How To Print Colored Text in Python How to open a file in python How to Open a file in python with Path How to run a Python file in CMD How to change the names of Columns in Python How to Concat two Dataframes in Python How to Iterate a List in Python How to learn python Online How to Make an App with Python How to develop a game in python How to print in same line in python How to create a class in python How to find square root in python How to import numy in python How to import pandas in python How to uninstall python How to upgrade PIP in python How to append a string in python How to comment out a block of code in Python How to change a value of a tuple in Python How to append an Array in Python How to Configure Python Interpreter in Eclipse Parameter Passing in Python How to plot a Histogram in Python How to Import Files in Python How to Download all Modules in Python How to get Time in seconds in Python How to Practice Python Programming How to plot multiple linear regression in Python How to set font for Text in Python

Sorting

Python Sort List Sort Dictionary in Python Python sort() function Python Bubble Sort

Programs

Factorial Program in Python Prime Number Program in Python Fibonacci Series Program in Python Leap Year Program in Python Palindrome Program in Python Check Palindrome In Python Calculator Program in Python Armstrong Number Program in Python Python Program to add two numbers Anagram Program in Python Number Pattern Programs in Python Even Odd Program in Python GCD Program in Python Python Exit Program Python Program to check Leap Year Operator Overloading in Python Pointers in Python Python Not Equal Operator Raise Exception in Python Salary of Python Developers in India What is a Script in Python

Misc

Introduction to Scratch programming SKLearn Clustering SKLearn Linear Module Standard Scaler in SKLearn Python Time Library SKLearn Model Selection Standard Scaler in SKLearn Accuracy_score Function in Sklearn Append key Value to Dictionary in Python Cross Entropy in Python Cursor in Python Data Class in Python How to Install Tweepy in Python Imread Python Program of Cumulative Sum in Python Python Program for Linear Search Python Program to Generate a Random String Read numpy array in Python Scrimba python Sklearn linear Model in Python Scraping data in python Accessing Key-value in Dictionary in Python Find Median of List in Python Linear Regression using Sklearn with Example Problem-solving with algorithm and data structures using Python Python 2.7 data structures Python Variable Scope with Local & Non-local Examples Arguments and parameters in Python Assertion error in python Programs for Printing Pyramid Patterns in Python _name_ in Python Amazon rekognition using python Anaconda python 3.7 download for windows 10 64-bit Android apps for coding in python Augmented reality in python Best app for python Difference between Perl and Python Not supported between instances of str and int in python Python comment symbol Python Complex Class Python IDE names Selection Sort Using Python Hypothesis Testing in Python Idle python download for Windows Insertion Sort using Python Merge Sort using Python Python - Binomial Distribution Python Logistic Regression with Sklearn & Scikit Python Random shuffle() method Python variance() function Python vs HTML Removing the First Character from the String in Python Adding item to a python dictionary Best books for NLP with Python Best Database for Python Count Number of Keys in Dictionary Python Cross Validation in Sklearn Drop() Function in Python EDA in Python Excel Automation with Python Python Program to Find the gcd of Two Numbers Python Web Development projects Adding a key-value pair to dictionary in Python Python Euclidean Distance Python Filter List Python Fit Transform Python e-book free download Python email utils Python range() Function Python random.seed() function What is the re.sub() function in Python Python PPTX Python Pickle Python Seaborn Python Coroutine Python EOL Python Infinity Python math.cos and math.acos function Python Project Ideas Based On Django Reverse a String in Python Reverse a Number in Python Python Word Tokenizer Python Trigonometric Functions Python try catch exception GUI Calculator in Python Implementing geometric shapes into the game in python Installing Packages in Python Python Try Except Python Sending Email Socket Programming in Python Python CGI Programming Python Data Structures Python abstract class Python Compiler Python K-Means Clustering NSE Tools In Python Operator Module In Python Palindrome In Python Permutations in Python Pillow Python introduction and setup Python Functionalities of Pillow Module Python Argmin Python whois Python JSON Schema Python lock Return Statement In Python Reverse a sentence In Python tell() function in Python Why learn Python? 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Important Difference between Python 2.x and Python 3.x with Example

The comparison between Python 2 and Python 3 is given in the article that follows. Python is a computer language that can perform more tasks than other languages and is simple to learn. Because of the data structures' exceptional efficiency, complicated operations can be expressed using short statements. Programming language beginners find it simple to use the language. Python version 1 was introduced in 1994, version 2 in 2000, and version 3 in 2008. Every revision includes updates, modifications, and a newer script for the language. Some versions have very small differences, while others have significant ones due to functional changes.

Python 2: What is it?

Python 2 simplified the process of writing code compared to earlier iterations. The Python Enhancement Proposal's technical details were implemented (PEP). Python 2.7, the final version in the 2. x series, will no longer be developed beyond 2020.

The Python 2 version does not support typing in statements because Python is not a typed language.

Python 3: What is it?

The Python programming language was updated with Python 3 in December 2008. This version was primarily provided to address Python 2 issues. Python 3 was incompatible with Python 2 due to the nature of these changes. It is inconsistent with the past.

To facilitate migration to Python 3, some Python 3 capabilities have been backported to Python 2. x versions. As a result, any business utilizing Python 2. x would need to make numerous changes to migrate their project to Python 3. x. These modifications affect all the libraries that make up the Python ecosystem and projects and apps.

Despite not having typing support in earlier versions, Python 3.5 introduced typing support, which is why some businesses prefer Python 3.

Primary Difference

  1. Python 2 syntax is somewhat challenging to learn; however, Python 3 syntax is simpler and easier to understand.
  2. Python 3 stores strings in Unicode by default, whereas Python 2 stores need you to define Unicode string values with the letter "u."
  3. Variable values in Python 3 never change, in contrast to Python 2, where they do when a global variable is used inside a for-loop.
  4. Parenthesis should be used to enclose Python 3 exceptions, while notations should be used for Python 2 exceptions.
  5. Python 3's ordering comparison principles are more straightforward than Python 2's, which are more complicated.
  6. Python 3 has the Range() method, but Python 2 uses range() to do iterations.

Why should we learn Python 2?

Despite being an outdated open-source version, Python 2 is still necessary for the following situations:

  1. To become a DevOps engineer, you must work with configuration management tools like puppet or ansible. You must use both of these variants in this situation.
  2. You will need to learn Python 2 if your company's programming is developed in that language.
  3. Python 2 is your only choice if your development team is working on a project that depends on particular third-party libraries or software that you cannot transfer to Python 3.

Why should we learn Python 3?

The following are the main justifications for utilizing Python 3. x:

  1. Modern methods like AI, machine learning, and data science are supported by Python 3.
  2. A sizable community of Python developers supports Python 3. Getting assistance is simple.
  3. Compared to prior versions, Python is simpler to learn.
  4. Offers Toolset and libraries that are strongly
  5. able to coexist with other languages

Code:

Python 3:
def main():
    print("Welcome to JTP")
if __name__== "__main__":
    main()

Output:

Welcome to JTP
Python 2:
def main():
    print "Welcome to JTP"
if __name__== "__main__":
    main()

Output:

Welcome to JTP

Utilize which version of Python?

Python 3 is the clear winner regarding differences between Python 2 and Python 3 nowadays. Python 2 won't be accessible after 2020, which is why. The future points toward the widespread use of Python 3.

Both versions receive their libraries. Python 2's libraries are outdated and incompatible with Python 3. Python 2 libraries are compatible with Python 3, although Python 3 libraries use their functions more inventively. It is possible to port a library from Python 2 to Python 3, although the process is difficult and time-consuming.

It is generally advised for a new developer to choose Python version 3 after taking into account the dwindling support for the Python 2 programming language and the extra benefits from upgrades to Python 3. However, the only compelling reason to adopt this version would be if a job required Python 2 capability.

Summary

  • The print statement is the main distinction between the two versions. In Python 2, the print statement can be written with or without a bracket; if a bracket is used, an error will be thrown. Though we can write the print statement without the brackets in Python 3, doing so would result in a warning and problems with compilation. In Python 3, the print statement must be contained in brackets. Although there is no functional difference, readers could have trouble moving between versions.
  • Python 2 simplified the process of writing code compared to earlier iterations. The Python Enhancement Proposal's technical details were implemented (PEP). Python 2.7, the final version in the 2. x series, will no longer be developed beyond 2020.
  • Working as a DevOps engineer and with configuration management tools is simple with Python 2. Knowing Python 2 is required to make the appropriate language changes because outdated tools are developed in this version of the programming language. It is also challenging if one knows Python 2 because many libraries cannot be converted to Python 3. If the novice is a developer and does not use any patches or outdated tools at all in the development environment, starting with Python 3 is a smart idea. In order to aid beginners in development, Python 3 produces new versions with their needs in mind.
  • Python 3 has excellent community support because it is more recent and continues to become better with each new version release. With new upgrades, development conflicts are eliminated, and versions enhance the typing language. Despite having some community support, Python 2 is not as good as Python 3. The performance of Python 2 is not growing better with the new releases, nor is the speed of compilation getting faster.
  • While performing a division program in the language, there is another difference. Python 3 will produce decimal points, unlike Python 2, which will not. For instance, in Python 2, 3/2 produces the result 1, whereas, in Python 3, the result is 1.5. In Python 2, the calculation comes close to producing the entire number, but Python 3 produces the precise value. Python 3 is superior to Python 2 in integer division.
  • The Python programming language was updated with the release of Python 3 in December 2008. This version was primarily provided to address Python 2 issues. Python 3 was incompatible with Python 2 due to the nature of these changes. It is irreconcilable with the past.
  • Comparison rules for orders have been made simpler in Python 2.
  • Ordering comparison rules in Python 3 are extremely complicated.
  • Today's Python 3 version is clearly superior to Python 2 in terms of differences.
  • The most recent version of Python is Python 2.7.13 for Python 2 and Python 3.8.2 for Python 3. Python 2 and Python 3 were both first made available in 2000 and 2008. Some businesses continue to support Python 2 as legacy software, but many believe Python 3 to be the programming language of the future. Python 3 is a good place for beginners to start since the majority of them will feel the need to advance rather than study an outdated language.
  • Although it is not difficult, porting from Python 2 to Python 3 is not entirely reliable. Before starting a language version, it's critical to understand the needs of the business and the project.