What is the difference between @staticmethod and @classmethod in Python?

Maybe a bit of example code will help: Notice the difference in the call signatures of foo, class_foo and static_foo: class A(object): def foo(self, x): print(f”executing foo({self}, {x})”) @classmethod def class_foo(cls, x): print(f”executing class_foo({cls}, {x})”) @staticmethod def static_foo(x): print(f”executing static_foo({x})”) a = A() Below is the usual way an object instance calls a method. The … Read more

What’s the difference between “class method” and “static method”?

So my question is why are they called class methods instead of a static method? What is the difference between a static method and a class method? From Wikipedia: Static methods neither require an instance of the class nor can they implicitly access the data (or this, self, Me, etc.) of such an instance. This … Read more

Why use classmethod instead of staticmethod? [duplicate]

There’s little difference in your example, but suppose you created a subclass of Foo and called the create_new method on the subclass… class Bar(Foo): pass obj = Bar.create_new() …then this base class would cause a new Bar object to be created… class Foo: @classmethod def create_new(cls): return cls() …whereas this base class would cause a … Read more

What can a const member function change? [duplicate]

What can a ‘const’ method change? Without explicitly casting away constness, a const member function can change: mutable data members, and any data the class has non-const access to, irrespective of whether that data’s accessible: via member variables that are pointers or references, via pointers or references passed as function arguments, via pointers or references … Read more

@staticmethod vs @classmethod in Python

Maybe a bit of example code will help: Notice the difference in the call signatures of foo, class_foo and static_foo: class A(object): def foo(self, x): print(f”executing foo({self}, {x})”) @classmethod def class_foo(cls, x): print(f”executing class_foo({cls}, {x})”) @staticmethod def static_foo(x): print(f”executing static_foo({x})”) a = A() Below is the usual way an object instance calls a method. The … Read more

What can a ‘const’ method change?

What can a ‘const’ method change? Without explicitly casting away constness, a const member function can change: mutable data members, and any data the class has non-const access to, irrespective of whether that data’s accessible: via member variables that are pointers or references, via pointers or references passed as function arguments, via pointers or references … Read more

Swift Declare Class Func in Protocol

You can review Apple’s Documentation (subsection Method Requirements). There says: As with type property requirements, you always prefix type method requirements with the static keyword when they are defined in a protocol. This is true even though type method requirements are prefixed with the class or static keyword when implemented by a class In practice, … Read more