gistfile1.py

#demonstrate nested list comprehensions as cartesian set

deck_of_cards = [(suit, rank) for suit in ("hearts", "diamonds", "spades", "clubs")
                              for rank in range(13)]

#######################################
#demonstrate functions as first-class values

def double_str(x):
  return str(x) + str(x)

def triple_str(x):
  return str(x) + str(x) + str(x)

adictionary = {"something": double_str,
               "or_other":  triple_str}

for key, func in adictionary.iteritems():
    print func(key)
# somethingsomething
# or_otheror_otheror_other