Why is the id of a Python class not unique when called quickly?

Question

I\'m doing some things in Python (3.3.3), and I came across something that is confusing me since to my understanding classes get a new id each time they are called.

Answer 1

It's releasing the first instance since it wasn't retained, then since nothing has happened to the memory in the meantime, it instantiates a second time to the same location.