Understanding Python 2 and Python 3 Differences

The video tutorial explains the differences between Python 2 and Python 3, focusing on the input function. Python 2's input function evaluates user input directly, while Python 3's input function returns a string. This change affects program compatibility between the two versions. The tutorial also introduces the concept of backwards compatibility and demonstrates how to use the eval() function in Python 3 to achieve similar functionality to Python 2.

What is the main difference between Python 2 and Python 3 as mentioned in the video?

• Python 2 has more libraries than Python 3.

• Python 3 is only for web development.

• Python 3 is not backward compatible with Python 2.

• Python 3 is faster than Python 2.

What does backward compatibility mean in the context of programming languages?

• A newer version has more features than an older version.

• A newer version is easier to learn than an older version.

• A newer version is faster than an older version.

• A newer version can run programs from an older version.

In Python 2, what does the input function return?

• A boolean value.

• A list of numbers.

• An evaluated expression.

• A string of characters.

How does the input function in Python 3 differ from Python 2?

• It returns a boolean value.

• It returns a dictionary.

• It returns a string instead of an evaluated expression.

• It returns a list of characters.

What is a string in programming?

• A sequence of functions.

• A sequence of boolean values.

• A sequence of characters.

• A sequence of numbers.

Why does the input function in Python 3 break the program when used like in Python 2?

• Because it returns a boolean value.

• Because it returns a list instead of a number.

• Because it returns a dictionary.

• Because it returns a string that is not evaluated.

What is the purpose of the eval() function in Python 3?

• To evaluate a string as a Python expression.

• To evaluate a list as a Python expression.

• To convert a string into a list.

• To convert a number into a string.

How can you make a Python 2 input function work in Python 3?

• By using the eval() function around input().

• By using the str() function around input().

• By using the int() function around input().

• By using the list() function around input().

What happens when you use eval() on a string in Python 3?

• It converts the string into a list.

• It evaluates the string as a Python expression.

• It converts the string into a boolean.

• It evaluates the string as a dictionary.

What is the main reason for using eval() with input() in Python 3?

• To evaluate the input as a dictionary.

• To evaluate the input as a Python expression.

• To convert input into a list.

• To convert input into a boolean.