An instance method is a function defined inside a class in object-oriented programming that operates on instances of the class. It has access to the instance's attributes and can modify the instance's state by using the 'self' parameter to refer to the specific object calling the method.
Design patterns are reusable solutions to common problems in software design, providing a shared language for developers to communicate and solve issues efficiently. They help in creating flexible, scalable, and maintainable code by encapsulating best practices and proven strategies for specific scenarios.
Class methods in object-oriented programming are methods that are bound to the class and not the instance of the class. They can be called on the class itself, often used to create factory methods or to access class-level data that applies to all instances.
A class attribute is a variable that is shared among all instances of a class in object-oriented programming, allowing for the storage of data that is common to all objects created from the class. Unlike instance attributes, which are unique to each object, class attributes are defined within the class and accessed using the class name or an instance of the class.