What is the difference between classmethod and staticmethod

Short answer

A classmethod receives the class as its first argument (cls), making it aware of inheritance. A staticmethod receives no implicit first argument and behaves like a plain function namespaced inside the class.

Details

Use classmethod as an alternative constructor or when you need polymorphic behavior across subclasses. For example, datetime.fromtimestamp is a classmethod that returns instances of the correct subclass. Use staticmethod for utility logic that conceptually belongs to the class but does not depend on instance or class state. Both decorators are part of Python classes and objects design and are often paired with Python decorators to keep code organized. In frameworks like Django, classmethods enable flexible query builders, while staticmethods encapsulate pure helper functions without external dependencies.

Tips

• Prefer @staticmethod over @classmethod when you do not need cls; it signals weaker coupling.
• Use @classmethod for factory methods so subclasses return instances of their own type.
• Avoid using either for logic that genuinely depends on instance state; use regular methods instead.