Liger and Tigon

liger_and_tigon.py

import random

class Female(object): pass

class Male(object): pass

def get_sex():
    return [Female, Male][random.randint(0, 1)]

class Animal(object):

    def __init__(self, name, sex=None):
        self.name = name
        self.sex = sex or get_sex()

    def introduction(self):
        print("I'm '%s' of %s." % (self.name, type(self).__name__))

    def can_crossing_to(self, target):
        return self.sex != target.sex

    def __add__(self, other):
        if self.can_crossing_to(other) and type(other) == type(self):
            return lambda name: type(self)(name)
        raise Exception("Miss match")

class Lion(Animal):

    def hunting(self):
        print("Hunt for group")

    def __add__(self, other):
        if self.can_crossing_to(other) and type(other) == Tiger:
            if self.sex == Male:
                return lambda name: Liger(name)
            else:
                return lambda name: Tigon(name)
        return Animal.__add__(self, other)

class Tiger(Animal):

    def hunting(self):
        print("Hunt for me")

    def __add__(self, other):

        if self.can_crossing_to(other) and type(other) == Lion:
            if self.sex == Male:
                return lambda name: Tigon(name)
            else:
                return lambda name: Ligon(name)
            return lambda name: Liger(name)
        return Animal.__add__(self, other)

class Liger(Lion, Tiger):

    def hunting(self):
        print("Hunt for ...!")

class Tigon(Tiger, Lion):

    def hunting(self):
        print("Hunt for ...?")

def main():
    lion1 = Lion(name="Lion hart")
    tiger1 = Tiger(name="Tiger uppercut", sex=Male if lion1.sex == Female else Female)
    hybrid = (lion1 + tiger1)(name="Hybrid super animal")

    lion1.introduction()
    lion1.hunting()
    tiger1.introduction()
    tiger1.hunting()
    hybrid.introduction()
    hybrid.hunting()

if __name__ == "__main__":
    main()