Sunday, 9 February 2025

Python Coding challenge - Day 373| What is the output of the following Python Code?

 


Code Explanation 

import weakref

Imports the weakref module, which allows creating weak references to objects.

class A: pass

Defines a simple class A with no attributes or methods.

obj = A()

Creates an instance obj of class A, which is a strong reference to the object.

Since obj is a strong reference, the object will not be garbage collected while obj exists.

wref = weakref.ref(obj)

Creates a weak reference wref to obj using weakref.ref(obj).

A weak reference does not prevent garbage collection of the object.

wref is a callable weak reference, meaning we must call wref() to access the original object.

print(wref() is obj)

Checks if wref() returns the same object as obj.

wref() calls the weak reference and returns the original object (obj).

Since obj is still alive, wref() returns the same object as obj

Final Answer:

True

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