Python error saying "AttributeError: can't set attribute". How is it possible?

The explanation you are getting this error is that you are naming the setter method mistakenly. You have named the setter method as set_x which is off base, this is the reason you are getting the Attribute Error.

To fix this error, rather than naming it as set_x you need to give it a similar name as the property you making a setter for, for your situation, you can do it like this:

@x.setter

def x(self, value):

    'setting'

    self._x = value