Object Destruction

Every Python object has a refcount integer field that counts how many objects/variables are pointing towards it within the program.

• refcount gets incremented when new variable or object points to it
• refcount gets decremented when either one the variables/objects that used to point to it gets reassigned to point to new object OR we call del obj

Once the refcount reaches zero or the object becomes unreachable (determined by mark-sweep algorithm used by the garbage collector)

• The interpreter will call __del__ special method for final cleanup before destorying the object.
• Its memory will be reclaimed by the interpreter through garbage collector