python模拟enum枚举类型的方法小结

class Numbers(object):  ONE = 1  TWO = 2  THREE = 3assert Numbers.ONE == 1assert Numbers.TWO == 2assert Numbers.THREE == 3

def enum(**enums):  return type('Enum', (object,), enums)Numbers = enum(ONE=1, TWO=2, THREE=3)assert Numbers.ONE == 1assert Numbers.TWO == 2assert Numbers.THREE == 3

class Enum(set):  def __getattr__(self, name):    if name in self:      return name    raise AttributeErrorNumbers = Enum( "ONE TWO THREE".split() )error = Falsetry:  print Numbers.ONE  print Numbers.TWO  print Numbers.THREEexcept:  error = Trueassert error == Falsetry:  print Numbers.FOURexcept:  error = Trueassert error == True