from itertools import *
import random
from sets import Set

class Animal(object):
  """docstring for """
  newid = count().next
  def __init__(self):
    self.id = Animal.newid()

def print_memory_address(obj):
  for o in obj:
    print "id: %d | Memory address: %d" % (o.id, hash(o))

## Generate 10 Animal objects
animals = [Animal() for i in range(10)]
print_memory_address(animals)

## Shuffle and check the memory address
random.shuffle(animals)
print "Shuffled!"
print_memory_address(animals)

## Check if generating a Set might change the address
immutable = Set([animals[0]])
print "Generated a Set!"
print_memory_address(immutable)

## Check if the memory address might be changed after subtraction
animals = list(Set(animals) - Set([animals[0]]))
print "Removed once!"
print_memory_address(animals)