Python Coding challenge - Day 386| What is the output of the following Python Code?

 

Step-by-Step Execution:

1. Import weakref Module

The weakref module in Python allows the creation of weak references to objects.

A weak reference does not prevent an object from being garbage collected.

2. Define the Node Class

The Node class has:

__init__: Initializes self.value with the given argument.

__repr__: Defines a string representation for the object (Node(value)).

3. Create a Node Object

node = Node(10)

Creates an instance of Node with value = 10.

node is now a strong reference to the object.

4. Create a Weak Reference

weak_node = weakref.ref(node)

weak_node is a weak reference to node.

This means weak_node does not increase the reference count of node, and it won't prevent garbage collection.

5. Print the Weak Reference

print(weak_node()) 

Calling weak_node() dereferences it, returning the actual Node(10) object if it is still alive.

Since node is still strongly referenced, the output is:

Node(10)

Final Output:

Node(10)