Python 2 vs Python 3: Key Differences

Python 2 made code development process easier than earlier versions. It implemented technical details of Python Enhancement Proposal (PEP). Python 2.7 (last version in 2.x ) is no longer under development and in 2020 will be discontinued.

In this tutorial, you will learn,

What is Python 2?
What is Python 3?
Why should you learn Python 2?
Why should you use Python 3?
History of Python 2
History of Python 3
Key Differences Between Python 2 and Python 3
Python 2 vs. Python 3 Example Code
Which Python Version to Use?

What is Python 3?

On December 2008, Python released version 3.0. This version was mainly released to fix problems which exist in Python 2. The nature of these change is such that Python 3 was incompatible with Python 2. It is backward incompatible Some features of Python 3 have been backported to Python 2.x versions to make the migration process easy in Python 3.

As a result, for any organization who was using Python 2.x version, migrating their project to 3.x needed lots of changes. These changes not only relate to projects and applications but also all the libraries that form part of the Python ecosystem.

Why should you learn Python 2?

Google Trends Python 2 vs. Python 3

Although, Python 2 is an old open source version here are where you still need to learn Python 2:

What is Python 2?
What is Python 3?
Why should you learn Python 2?
Why should you use Python 3?
History of Python 2
History of Python 3
Key Differences Between Python 2 and Python 3
Python 2 vs. Python 3 Example Code
Which Python Version to Use?

Why should you use Python 3?

Stack Overflow Questions Python 2 vs. Python 3

Here, are prime reasons for using Python 3.x versions:

What is Python 2?
What is Python 3?
Why should you learn Python 2?
Why should you use Python 3?
History of Python 2
History of Python 3
Key Differences Between Python 2 and Python 3
Python 2 vs. Python 3 Example Code
Which Python Version to Use?

History of Python 2

What is Python 2?
What is Python 3?
Why should you learn Python 2?
Why should you use Python 3?
History of Python 2
History of Python 3
Key Differences Between Python 2 and Python 3
Python 2 vs. Python 3 Example Code
Which Python Version to Use?

History of Python 3

What is Python 2?
What is Python 3?
Why should you learn Python 2?
Why should you use Python 3?
History of Python 2
History of Python 3
Key Differences Between Python 2 and Python 3
Python 2 vs. Python 3 Example Code
Which Python Version to Use?

Key Differences Between Python 2 and Python 3

Python 2 vs. Python 3 Example Code

Python 3

def main():
  print("Hello World!")
  
if __name__== "__main__":
  main()

Python 2

def main():
  print "Hello World!"
  
if __name__== "__main__":
  main()

Which Python Version to Use?

When it comes to Python version 2 vs. 3 today, Python 3 is the outright winner. That’s because Python 2 won’t be available after 2020. Mass Python 3 adoption is the clear direction of the future.

After considering declining support for Python 2 programming language and added benefits from upgrades to Python 3, it is always advisable for a new developer to select Python version 3. However, if a job demands Python 2 capabilities, that would be an only compelling reason to use this version.

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