What's the common practice for enums in Python? [duplicate]

class Materials:    Shaded, Shiny, Transparent, Matte = range(4)>>> print Materials.Matte3

I've seen this pattern several times:

>>> class Enumeration(object):        def __init__(self, names):  # or *names, with no .split()            for number, name in enumerate(names.split()):                setattr(self, name, number)>>> foo = Enumeration("bar baz quux")>>> foo.quux2

You can also just use class members, though you'll have to supply your own numbering:

>>> class Foo(object):        bar  = 0        baz  = 1        quux = 2>>> Foo.quux2

If you're looking for something more robust (sparse values, enum-specific exception, etc.), try this recipe.

I have no idea why Enums are not support natively by Python.The best way I've found to emulate them is by overridding _ str _ and _ eq _ so you can compare them and when you use print() you get the string instead of the numerical value.

class enumSeason():    Spring = 0    Summer = 1    Fall = 2    Winter = 3    def __init__(self, Type):        self.value = Type    def __str__(self):        if self.value == enumSeason.Spring:            return 'Spring'        if self.value == enumSeason.Summer:            return 'Summer'        if self.value == enumSeason.Fall:            return 'Fall'        if self.value == enumSeason.Winter:            return 'Winter'    def __eq__(self,y):       return self.value==y.value

Usage:

>>> s = enumSeason(enumSeason.Spring)>>> print(s)Spring