Python中模拟enum枚举类型的5种方法分享

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

printdirDown

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

printdirections.DOWN

#way4
defenum(args,start=0):
   classEnum(object):
       __slots__=args.split()

       def__init__(self):
           fori,keyinenumerate(Enum.__slots__,start):
               setattr(self,key,i)

   returnEnum()

e_dir=enum("updownleftright")

printe_dir.down

#way5
#sometimesweneeduseenumvalueasstring
Directions={"up":"up","down":"down","left":"left","right":"right"}