Python Coding challenge - Day 952| What is the output of the following Python Code?

 Code Explanation:

1. Defining the Descriptor Class

class D:

A class named D is defined.

It becomes a data descriptor because it implements both __get__ and __set__.

2. Implementing __get__

    def __get__(self, obj, owner):

        return 1

Called whenever x is accessed.

Always returns 1, regardless of stored values.

3. Implementing __set__

    def __set__(self, obj, val):

        obj.__dict__["x"] = 99

Called whenever x is assigned a value.

Ignores the value being assigned (val) and always stores 99 in the instance dictionary.

4. Using the Descriptor in Class A

class A:

    x = D()

x is now a managed attribute controlled by descriptor D.

5. Creating an Instance

a = A()

Creates object a.

Initially:

a.__dict__ = {}

6. Assigning to a.x

a.x = 5

Because x is a data descriptor, Python calls:

D.__set__(a, 5)

This stores:

a.__dict__["x"] = 99

So now:

a.__dict__ == {"x": 99}

7. Accessing a.x

print(a.x)

Resolution order:

Python checks for data descriptor on class A.

Finds D.

Calls:

D.__get__(a, A)

__get__ returns 1.

The instance value 99 is ignored.

8. Final Output

1

Final Answer

✔ Output:

1

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