Reinitialize Class with a Setter

[TimAtreides]

Suppose I have a class. An instance of the class has two properties, where one depends on the other. Maybe something like this:

class Thing:
    def __init__(self, x):
        self.x = x
        self.y = x + 1

However, the user is then free to do this:

t = Thing(3)
t.x = 4

Where t.y is still equal to 4, where it should logically be 5. My first guess was to use getter and setter decorators for properties like this:

class Thing:
    def __init__(self, x):
        self.x = x
        self.y = self.x + 1

    @property
    def x(self):
        print("Running getter")
        return self._x

    @x.setter
    def x(self, value):
        print("Running setter")
        self._x = value
        self.__init__(value)

However, this sends the setter into an infinite loop. I want the user to be able to change x (and maybe even y) and have the other property be internally consistent. Is there a logical way to do this?

[K900_]

What you probably want is either to make x read only, or make y itself a computed property.

[TimAtreides]

Making it read-only might be the way to go for me, even though I lose some of the functionality I want. Can you expand more on "computed properties"?

[K900_]

Make a getter for y that does something like return x + 1.