Python Error Saying "AttributeError: Can't Set Attribute". How Is It Possible?

The reason you are getting this error is because you are naming the setter method incorrectly. You have named the setter method as set_x which is incorrect, this is why you are getting the Attribute Error saying that python can't set attributes.

To fix this error, instead of naming it as set_x you need to give it the same name as the property you creating a setter for, in you case you can do it like this:

@x.setter
def x(self, value):
    'setting'
    self._x = value