override-prop-deco.py

def printcall(f):
    def f_wrapper(*args, **kwargs):
        print('Running {}...'.format(f.__name__))
        retval = f(*args, **kwargs)
        print('Finished {}.'.format(f.__name__))
        return retval
    return f_wrapper

# The rest are based on http://stackoverflow.com/a/14349742
class Foo(object):
    def _get_meow(self):
        return self._meow + ' HEHEHE from a Foo'
    def _set_meow(self, value):
        self._meow = value
        
    @printcall
    def _decorated_get_meow(self):
        return self._get_meow()

    meow  = property(fget=lambda self: self._get_meow(),
                     fset=lambda self, value: self._set_meow(value))

    # Addition to SO's code fragment
    dmeow = property(fget=lambda self: self._decorated_get_meow())


class Bar(Foo):
    def _get_meow(self):
        return super()._get_meow() + ', HAHAHA altered by a Bar'

if __name__ == '__main__':
    foo = Foo()
    bar = Bar()

    foo.meow, bar.meow = 'meow', 'meow'
    print(foo.meow)
    print(bar.meow)
    print()
    print(foo.dmeow)
    print(bar.dmeow)