chainmail-weather.py

from enum import Enum
from random import randint

class Weather(Enum):
    CLEAR = auto()
    CLOUDY = auto()
    RAINY = auto()

    def next(self):
        d6 = randint(1,6)
        if self.value is Weather.CLEAR:
            if d6 == 6:
                return Weather.CLOUDY
            else:
                return Weather.CLEAR
        if self.value is Weather.CLOUDY:
            if d6 <= 2:
                return Weather.CLEAR
            else if d6 >= 5:
                return Weather.RAINY 
            else:
                return Weather.CLOUDY
        if self.value is Weather.RAINY:
            if d6 <= 2 or d6 >= 5:
                return Weather.RAINY
            else:
                return Weather.CLOUDY