# Author:  James Tam
# Version: March 6, 2010
# An example that illustrates how a list variable is not actually a list but
# instead it's a reference to a list.

list1 = [1,2]
list2 = [2,1]
print (list1, list2)

# Doesn't copy the elements of one list to another but instead we just make
# list1 refer to the list that's referred to by list2.
list1 = list2
print (list1, list2)

list2[0] = 66
print (list1, list2)