class Pokemon(object):
    """
    A basic class with some attributes that we can use to test out class
    registries.
    """
    element = None

    def __init__(self, name=None):
        super(Pokemon, self).__init__()

        self.name = name


# Define some classes that we can register.
class Charmander(Pokemon):
    element = 'fire'


class Charmeleon(Pokemon):
    element = 'fire'


class Squirtle(Pokemon):
    element = 'water'


class Wartortle(Pokemon):
    element = 'water'


class Bulbasaur(Pokemon):
    element = 'grass'


class Ivysaur(Pokemon):
    element = 'grass'


class Mew(Pokemon):
    element = 'psychic'


class PokemonFactory(object):
    """
    A factory that can produce new pokémon on demand.  Used to test how
    registries behave when a function is registered instead of a class.
    """

    @classmethod
    def create_psychic_pokemon(cls, name=None):
        return Mew(name)