Intermediate Python by Oswald Campesato

Author:Oswald Campesato
Language: eng
Format: epub
Publisher: Mercury Learning and Information

ACCESSIBILITY CONVENTIONS

Python 3 uses the following conventions to distinguish protected variables and functions, private variables and functions, and magic methods:

Protected variables contain a single underscore “_” prefix in their name.

Private variables contain a double underscore “__” prefix in their name.

Magic methods contain a double underscore “__” prefix and suffix in their name.

The preceding conventions do not prevent you from accessing any method, regardless of its accessibility type, in a Python class. However, accessibility rules are enforced in Java (among other programming languages), as shown in the following code block for variables:

public int x = 1; protected int y = 2; private int z = 3;

Variables and methods with different scopes have different restrictions regarding the objects that can access them, as summarized here:

Public variables and methods can be accessed by any object (i.e., instances of a class).

Protected variables and methods can be accessed only by an instance of the class in which they are defined or by instances of a subclass.

Private variables and methods can be accessed only by an instance of the class in which they are defined.

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.