Pythonでメタプログラミング ref: https://qiita.com/fujimisakari/items/0d4786dd9ddeed4eb702

file0.py

class Hoge(object):

    def function1(self, args):
        return args

    def function2(self, args):
        return args + 50

file1.py

def func1(self, args):
    return args


def func2(self, args):
    return args + 50


# type(クラス名、親クラス、メンバー属性)になります
Hoge = type('Hoge', (object, ), {'function1': func1, 'function2': func2})

file2.py

class HogeMeta(type):

    def __new__(mcs, name, bases, dictionary):
        cls = type.__new__(mcs, name, bases, dictionary)
        setattr(cls, 'member1', 10)
        setattr(cls, 'member2', 20)
        return cls

class Hoge(object):

    __metaclass__ = HogeMeta

print Hoge().member1   -> 10
print Hoge().member2   -> 20

file3.py

class AttackSkill(object):
    name = u'特大攻撃'


class HealSkill(object):
    name = u'回復'


class PoisonSkill(object):
    name = u'毒攻撃'


class SkillMeta(type):

    def __new__(mcs, name, bases, dictionary):
        cls = type.__new__(mcs, name, bases, dictionary)
        skills = {'attack': AttackSkill,
                  'heal': HealSkill,
                  'poison': PoisonSkill}
        cls.SKILLS = skills
        return cls


class Skills(object):

    __metaclass__ = SkillMeta

    SKILLS = {}

    @classmethod
    def get(cls, skill_key):
        return cls.SKILLS[skill_key]

Skill = Skills.get

print Skill('attack').name   -> 特大攻撃
print Skill('heal').name     -> 回復