Class Method

A class method is a method in object-oriented programming that is bound to the class rather than to an instance of the class. It can be called on the class itself without needing to create an object, and typically operates on class-level data or performs tasks related to the class as a whole. In languages like Python, it is defined using a decorator such as @classmethod and takes the class (often named 'cls') as its first parameter.

Also known as: static method (in some contexts), class-level method, @classmethod, cls method, class factory method

Why learn Class Method?

Developers should learn and use class methods when they need to create factory methods that return instances of the class, manipulate class-level attributes, or implement alternative constructors. For example, in Python, class methods are useful for parsing data into objects or setting up configurations that apply to all instances, such as in database ORM frameworks like SQLAlchemy.

Learning Resources

• tutorial: Python @classmethod and @staticmethod Explained
• docs: MDN Web Docs: Class static initialization blocks
• tutorial: GeeksforGeeks: Class method vs Static method in Python
• docs: Java Tutorial: Class Methods
• video: YouTube: Python Class Methods Explained