Python Coding challenge - Day 990| What is the output of the following Python Code?

 

Code Explanation:

1. Class Definition

class Cleaner:

Explanation:

This line defines a class named Cleaner.

2. Method Definition

    def run(self):

Explanation:

run is an instance method of the Cleaner class.

self refers to the current object that calls this method.

3. Deleting the Method from the Class

        del Cleaner.run

Explanation:

This line deletes the run method from the class Cleaner itself.

After this executes:

The method run no longer exists in the Cleaner class.

This affects all instances of Cleaner, not just the current one.

Important:

The method is deleted while it is executing.

Python allows this because the function object is already being used.

4. Returning a Value

        return "done"

Explanation:

Even though Cleaner.run has been deleted,

The current call continues normally and returns "done".

5. Creating an Object

c = Cleaner()

Explanation:

Creates an instance of the Cleaner class.

The object c can initially access run through the class.

6. Calling the Method

print(c.run())

Explanation:

c.run() calls the method:

Python finds run in Cleaner.

Method execution starts.

Cleaner.run is deleted during execution.

"done" is returned.

Output:

done

7. Checking If Method Still Exists

print(hasattr(Cleaner, "run"))

Explanation:

hasattr(Cleaner, "run") checks whether the class Cleaner

still has an attribute named run.

Since del Cleaner.run was executed earlier:

The method no longer exists in the class.

Output:

False

8. Final Summary 

Methods belong to the class, not the object.

A method can be deleted from the class while it is running.

Deleting a class method affects all instances.

The current method call still completes successfully.

Final Output of the Program

done

900 Days Python Coding Challenges with Explanation