Python: How to pass more than one argument to the property getter?

Consider the following example:

class A:
    @property
    def x(self): return 5

So, of course calling the a = A(); a.x will return 5

But imagine that you want to be able to modify the property x.
This way, for example:

class A:
    @property
    def x(self, neg = False): return 5 if not neg else -5

And call it with a = A(); a.x(neg=True)

That will raise a TypeError: 'int' object is not callable, that is quite normal, since our x is evaluated as 5.

So, I would like to know how one can pass more then one argument to the property getter, if it is possible at all.