human
What is a the Python code you requested given the following:
I am working on the file "Descriptors and Properties.ipynb".
The first task is:
Think of x as an object prepared to delegate to the three methods.  Every time a new C instance is created, that instance is bound to a deeply internal "secret" __x.  The public or class level x is a proxy to a set of instance methods living inside C.__dict__.  Each instance of C talks to its respective self.__x i.e. don't confuse the shared nature of x with the private individuality of each self.__x
The code below goes a step further in using two instances of C to demonstrate how properties work.  In this case, the same Property class is used as a decorator.  Notice how .setter() becomes available once the getter is defined, because the decorator has "abucted" the original method and turned it into an instance of something, of which .setter is a now an attribute.
Can you write Python code for it?
assistant
#Here is the Python code you requested.

class Generic:
    
    def __init__(self, a=None, b=None):
        self.__dict__['y'] = C()
        self.y = a
        self.__dict__['z'] = C()
        self.z = b

    @Property
    def y(self):
        return self.__dict__['y'].x

    @y.setter
    def y(self, val):
        print("Generic setter for y")
        self.__dict__['y'].x = val

    @Property
    def z(self):
        return self.__dict__['z'].x
        
    @z.setter
    def z(self, val):
        print("Generic setter for z")
        self.__dict__['z'].x = val