关于python：基于Django的技能实现

class Skill (models.Model):
      name = models.CharField()
      cost = models.PositiveIntegerField()
      blah blah blah

class Skill(models.Model):
    name = models.CharField()
    cost = models.PositiveIntegerField()
    effects = models.ManyToManyField(Effect)

class Effect(models.Model):
    description = models.CharField()
    action = models.CharField()

    # Each Django model has a ContentType.  So you could store the contenttypes of
    # the Player, Enemy, and Breakable model for example
    objects_usable_on = models.ManyToManyField(ContentType)

    def do_effect(self, **kwargs):
        // self.action contains the python module to execute
        // for example self.action = ‘effects.spells.frost_damage’
        // So when called it would look like this:
        // Effect.do_effect(damage=50, target=target)
        // ‘damage=50’ gets passed to actions.spells.frost_damage as
        // a keyword argument    

        action = __import__(self.action)
        action(**kwargs)

def frost_damage(**kwargs):
    if ‘damage’ in kwargs:
        target.life –= kwargs[‘damage’]

        if target.left <= 0:
            # etc. etc.

class BaseSkill(models.Model):
    name = models.CharField()
    cost = models.PositiveIntegerField()
    type = models.CharField()
    ….

class FireSkill(BaseSkill):
    burn_time = models.PositiveIntegerField()

    def save():
        self.type = ‘fire_skill’
        return super(FireSkill, self).save()

class IceSkill(BaseSkill):
    freeze_time = models.PositiveIntegerField()

    def save():
        self.type = ‘ice_skill’
        return super(IceSkill, self).save()