id() of an object

Everything in python is an object. id(object) function returns the identity of the object. This is an integer that is unique for the given object and remains constant during its lifetime.

print('id of 5 =',id(5))

a = 5
print('id of a =',id(a))

b = a
print('id of b =',id(b))

c = 5.0
print('id of c =',id(c))

id of 5 = 4483840576
id of a = 4483840576
id of b = 4483840576
id of c = 4518905328