Question from Python challenge

Question

I want to know why the output is 2 for b.n and 2 for the second a.n when n=0 in MyClass() ?
https://code.sololearn.com/c6J4Urvy4cBR/?ref=app

Answer 1

The class is set up to count +1 when a new instance is created and -1 when an instance is destroyed.

When you write a = ... the second time, you strip off the name a from the instance that had it before.

This means, it has no reference in your code anymore.

And this means that the object is deleted.

The same moment you create a new instance and stick the name a on it.

If you do -1, then +1, you end up with the same result.

I explain this in more detail here:

https://code.sololearn.com/c89ejW97QsTN/?ref=app

Answer 2

Well, you see : the variable a is reused. That mean that the object it hold is destroyed, and a new object is created and reassigned.