WIP Tamigochi (about 50-60 mins in)

gistfile1.py

import sys
import time
from datetime import datetime, timedelta
from random import randint

STATES = {
    'happy': lambda a: ('happy','prrrr') if not a else (
        'sad', 'pffft'),
    'hungry': lambda a: ('happy', 'nom') if a == 'feed' else (
        'sad', "no I'm hungry!"),
    'poopy': lambda a: ('happy', 'Mmmmm') if a == 'clean' else (
        'sad', 'wipe me!'),
    'sleepy': lambda a: ('happy', 'Zzzzz') if a == 'rest' else (
        'sad', 'yawn'),
    'dead': lambda a: ('dead', '...')
}

class TamigochiState(object):

    def __init__(self, name,  t_time=None):
        self.time = t_time
        self.name = name
        self.f = STATES[name]

    def __str__(self):
        return self.name

    @classmethod
    def default(cls, time=datetime.now() + timedelta(seconds=5)):
        return cls('happy', time)

    @classmethod
    def rand(cls):
        states = STATES.keys()
        state = states[randint(0, len(states) - 1)]
        return  cls(state)

def simulate(tami):
    last = tami[0].time
    state = tami[0]
    chance = [TamigochiState.default()] if state.name == 'happy' else []
    while True:
        nxt = last + timedelta(seconds=randint(4, 8))
        state = TamigochiState.rand()
        state.time = nxt
        tami.append(state)
        if state.name == "dead":
            if chance:
                tami.pop()
                tami.append(chance.pop())
            else:
                return sorted(tami, key=lambda t: t.time)
        last = nxt

if __name__ == '__main__':
    start = datetime.now()
    tam = simulate([TamigochiState.default(start)])
    currently = tam[0]
    while currently:
        ipt = raw_input("Tamigochi: ")
        valid = [t for t in tam if t.time >= datetime.now()]

        if not valid or valid[0].name == 'dead':
            print "Tamigochi has died!"
            sys.exit()

        currently = valid[0]
        if ipt in ['feed', 'clean', 'rest']:
            actioned = currently.f(ipt)
            print actioned[1]
            if actioned[0] != 'sad':
                tam = simulate([TamigochiState(actioned[0],datetime.now())])
        else:
            print currently

        time.sleep(0.1)