What are the key differences between Python 2 and 3 ?

The key differences between Python 2 and Python 3 are significant and impact various aspects of programming in Python, from syntax and code readability to library support and future relevance. Here are the main differences:

Syntax and Code Readability

• Print Function: In Python 2, print is a statement and does not require parentheses. For example, print "Hello, World!". In Python 3, print is a function and requires parentheses: print("Hello, World!")[1][2][3][7].
• Integer Division: In Python 2, dividing two integers results in an integer. For example, 7 / 2 yields 3. In Python 3, the same operation results in a floating-point number, 3.5, making division more intuitive[1][5][7].
• Unicode: Python 2 uses ASCII as the default string encoding, whereas Python 3 uses Unicode, which simplifies working with non-ASCII text[1][2][7].

Error Handling and Exceptions

• Exceptions: Python 2 exceptions are enclosed in notations, while Python 3 uses parentheses. This change enhances clarity and consistency in code[1][2].
• Syntax for Raising Exceptions: Python 2 uses the syntax raise Exception, "Error message", whereas Python 3 uses raise Exception("Error message") with parentheses, which aligns with its function call syntax[7].

Libraries and Compatibility

• Libraries: Many Python 2 libraries are not forward compatible with Python 3. Conversely, Python 3 has introduced many new libraries designed to work with its features and are not backward compatible with Python 2[1].
• Backward Compatibility: Python 3 is not backward compatible with Python 2, meaning code written for Python 2 may not work under Python 3 wit...