Decorator to create @Property getters for all my class instance attributes whose names start with one underscore Python3+

auto property getter

def auto_property_getters(cls):
    class AutoPropertyClass(cls):
        def __init__(self, *args, **kwargs):
            super().__init__(*args, **kwargs)
        def __getattr__(self, name):
            if name in [attr[1:] for attr in dir(self) if attr.startswith('_') and not attr.startswith('__')]:
                return getattr(self, f"_{name}")
            raise AttributeError(f"'{self.__class__.__name__}' object has no attribute '{name}'")
    return AutoPropertyClass
    
@auto_property_getters
class X:
    def __init__(self):
        self._age = 34
        self._address = 'some address'
        self.dog_name = 'Saitama'
       
Solution 2.

class AutoPropertyDecorator:
    def __init__(self, attr_name):
        self.attr_name = attr_name
    def __get__(self, instance, owner):
        if instance is None:
            return self
        return getattr(instance, f"{self.attr_name}")

def auto_property_getters(cls):
    class AutoPropertyClass(cls):
        def __init__(self, *args, **kwargs):
            super().__init__(*args, **kwargs)
            for attr_name in vars(self):
                if attr_name.startswith('_') and not attr_name.startswith('__') and not isinstance(getattr(self, attr_name), property):
                    setattr(self.__class__, attr_name[1:], AutoPropertyDecorator(attr_name))
    return AutoPropertyClass
 
@AutoPropertyDecorator
class X:
    def __init__(self):
        self._age = 34
        self._address = 'some address'
        self.dog_name = 'Saitama'