The Ultimate Guide to Python Programming With Python 3.10 - Naming Conventions

The video tutorial explains the conventions for naming variables in Python using underscores. It covers the use of a single underscore for variables whose values are not used, and for protected variables within classes. It also discusses the use of double underscores to create private variables, which are not accessible from outside the class. The tutorial demonstrates how these naming conventions can help convey different meanings and intentions in code, and how they can be used to discourage the use of certain attributes directly.

What is the purpose of using a single underscore (_) in a variable name in Python?

• To make the variable private

• To indicate a constant value

• To make the variable public

• To indicate a variable that is not used

What does prefixing a variable with a single underscore (_) signify?

• The variable is a constant

• The variable is public

• The variable is protected

• The variable is private

How does Python treat variables prefixed with double underscores (__)?

• As constants

• As private variables with name mangling

• As protected variables

• As public variables

What happens when you try to access a private variable from outside its class?

• It is accessed as a protected variable

• It results in an error

• It is automatically converted to a public variable

• It can be accessed directly

Why might a programmer use underscores in variable names?

• To make variables immutable

• To ensure variables are always public

• To follow naming conventions that convey variable usage

• To make the code look complex