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I want to be able to create a python decorator that automatically "registers" class methods in a global repository (with some properties).
Example code:
class my_class(object): @register(prop1,prop2) def my_method( arg1,arg2 ): # method code here... @register(prop3,prop4) def my_other_method( arg1,arg2 ): # method code here... I want that when loading is done, somewhere there will be a dict containing:
{ "my_class.my_method" : ( prop1, prop2 ) "my_class.my_other_method" : ( prop3, prop4 ) } Is this possible?
361
we have used the _call_ to define the decorator as a method class in the code. The _call_ method is used when a user creates an object to work as a function, and the decorator will return the object that works like a function.
In Python, the @classmethod decorator is used to declare a method in the class as a class method that can be called using ClassName.MethodName () . The class method can also be called using an object of the class.
We can easily create decorators inside a class and it is easily accessible for its child classes.
Create Decorators by passing functions as arguments to the class constructor To create a decorated function, We can pass the add() function as an input argument to the constructor of the decorator class. The add() function will be assigned to the funcvariable in the decorator_class.
Here's a little love for class decorators. I think the syntax is slightly simpler than that required for metaclasses.
def class_register(cls): cls._propdict = {} for methodname in dir(cls): method = getattr(cls, methodname) if hasattr(method, '_prop'): cls._propdict.update( {cls.__name__ + '.' + methodname: method._prop}) return cls def register(*args): def wrapper(func): func._prop = args return func return wrapper @class_register class MyClass(object): @register('prop1', 'prop2') def my_method(self, arg1, arg2): pass @register('prop3', 'prop4') def my_other_method(self, arg1, arg2): pass myclass = MyClass() print(myclass._propdict) # {'MyClass.my_other_method': ('prop3', 'prop4'), 'MyClass.my_method': ('prop1', 'prop2')} If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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