# way1
class Directions:
??? up = 0
??? down = 1
??? left = 2
??? right =3
???
print Directions.down

# way2
dirUp, dirDown, dirLeft, dirRight = range(4)

print dirDown

# way3
import collections
dircoll=collections.namedtuple('directions', ('UP', 'DOWN', 'LEFT', 'RIGHT'))
directions=dircoll(0,1,2,3)

print directions.DOWN

# way4
def enum(args, start=0):
??? class Enum(object):
??????? __slots__ = args.split()

??????? def __init__(self):
??????????? for i, key in enumerate(Enum.__slots__, start):
??????????????? setattr(self, key, i)

??? return Enum()

e_dir = enum('up down left right')

print e_dir.down

# way5
# some times we need use enum value as string
Directions = {'up':'up','down':'down','left':'left', 'right':'right'}

print Directions['down']