# Literal 9 is an object
b = 9

# Reference count of object 9 
# becomes 0.
b = 4

In the above example, the value 9 is an object and thus memory is allocated for it to be assigned to variable b. At this point, it has a reference count value of 1. Once the variable b is reassigned to 4, the reference count of value 9 decrements to 0. Hence, 9 is deallocated from memory.