What are some advanced techniques for class decorators in Python?

What are some advanced techniques for class decorators in Python?

Advanced class decorators in Python can include techniques like parameterized decorators, chaining decorators, and using functools.wraps to preserve metadata.

Can you explain how to create a parameterized class decorator?

Sure! A parameterized class decorator takes arguments and can modify the class based on those arguments. Here's a simple example:

def my_decorator(param):
    def decorator(cls):
        cls.param = param
        return cls
    return decorator

@my_decorator('example')
class MyClass:
    pass

What about chaining multiple decorators?

Chaining decorators allows you to apply multiple decorators to a class. You simply stack them on top of each other:

@decorator_one
@decorator_two
class MyClass:
    pass
``` This way, each decorator can modify the class in sequence.

Are there any best practices for using class decorators?

Yes, some best practices include keeping decorators simple, using functools.wraps to maintain metadata, and documenting the behavior of your decorators clearly.