human
Here 'self' is used for given the following:
I am working on the file "Descriptors and Properties.ipynb".
The first task is:
By the way, notice that method( ) has a single argument 'this', showing that 'self' is by convention and, furthermore, the value of 'this' will depend on whether method( ) is called: on an instance or on a class.  
Calling me.method() sets 'this' to the instance object i.e. what 'self' is used for.  
However Generic.method(Generic) is likewise legal Python, and in this case you must pass the class explicitly if that's what's needed.  
The @classmethod decorator, applied to a method, will pass in the class automatically.
Can you write Python code for it?
assistant
#Here 'self' is used for.

class Generic2(Generic):
    
    def method(this):
        return ("this is: " + 
                ("Instance" if isinstance(this, Generic2) 
                else "Class"))

class Generic3(Generic):
    
    @classmethod
    def method(this):
        return ("this is: " + 
                ("Instance" if isinstance(this, Generic2) 
                else "Class"))
    
me = Generic2(1,2)
print("On an instance: ", me.method())
print("On the class:   ", Generic2.method(Generic2))

me = Generic3(1,2)
print("With @classmethod decorator: ", me.method())