Python __builtins__ Classmethod class (11)

11, ' Classmethod ', the modifier corresponding to the function does not need to instantiate, do not need the self parameter, but the first parameter needs to be a CLS parameter representing its own class, you can invoke the properties of the class, the method of the class, instantiate the object, and so on.

Class Classmethod (object) |   Method Classmethod (function) |  |  Convert a function to is a class method.   # Convert a function into a class method |  | A class method receives the class as implicit first argument,
A class method that receives the class as an implicit parameter | Just like an instance method receives the instance.
Just like an instance method receives an Instance object |   To declare a class method with this idiom: |    |        Class C: |        @classmethod |            def f (CLS, arg1, Arg2, ...): |   ... |  |  It can called either on the class (e.g. C.F ()) or in an instance |  (e.g. C (). f ()). The instance is ignored except for its class.
You can call the F function with a class object, or you can invoke an F function on an instance object.  If A class method is called for a derived class, the derived class | Object is passed as the implied first argument.   |  | Class methods is different than C + + or Java static methods.  | If you want those, see the Staticmethod builtin.   |  |   Methods defined here: |  |      __get__ (self, instance, owner,/) | Return an attribute of instance, which is of type owner.   |  |      __init__ (self,/, *args, **kwargs) |  Initialize self. See Help (Type Self) for accurate signature.   |  |      __new__ (*args, **kwargs) from Builtins.type |  Create and return a new object. See Help (type) for accurate signature.   |  |  ---------------------------------------------------------------------- |   Data descriptors defined here: |  |   __dict__ |  |   __func__ |  | __isabstractmethod__

Python __builtins__ Classmethod class (11)