What are some practical use cases for class decorators in Python?

What are some practical use cases for class decorators in Python?

Class decorators in Python can be used for logging, enforcing access control, modifying class attributes, and more.

Can you give an example of a logging decorator?

Sure! A logging decorator can be created to log when a class method is called. Here's a simple example:

def log_method_call(method):
    def wrapper(self, *args, **kwargs):
        print(f'Calling method: {method.__name__}')
        return method(self, *args, **kwargs)
    return wrapper

class MyClass:
    @log_method_call
    def my_method(self):
        print('Executing my_method')

What about using decorators for access control?

You can create a decorator that checks user permissions before allowing access to certain class methods. For example:

def requires_permission(permission):
    def decorator(method):
        def wrapper(self, *args, **kwargs):
            if self.user.has_permission(permission):
                return method(self, *args, **kwargs)
            else:
                raise PermissionError('Access denied')
        return wrapper
    return decorator

class SecureClass:
    @requires_permission('admin')
    def admin_method(self):
        print('Admin access granted')