Expert Python Programming - Second Edition

Naming styles

The different naming styles used in Python are:

• CamelCase
• mixedCase
• UPPERCASE, and UPPER_CASE_WITH_UNDERSCORES
• lowercase and lower_case_with_underscores
• _leading and trailing_ underscores, and sometimes __doubled__ underscores

Lowercase and uppercase elements are often a single word, and sometimes a few words concatenated. With underscores, they are usually abbreviated phrases. Using a single word is better. The leading and trailing underscores are used to mark the privacy and special elements.

These styles are applied to:

• Variables
• Functions and methods
• Properties
• Classes
• Modules
• Packages

Variables

There are two kinds of variables in Python:

• Constants
• Public and private variables

Constants

For constant global variables, an uppercase with an underscore ...