overlapping sets

[Lonnie Princehouse]

There is a sets.Set class built in to Python.  You might want to use
this instead of lists.  It defines some handy set operations like
intersection, union, and so on.

from sets import Set

my_sets = {
  'one' : Set([0,4,7,9]),
  'two' : Set([0,3,7,9]), 
  etc...
}