#!/usr/bin/env python

from animal import Animal


class Mammal(Animal):  # <1>
    def __init__(self, species, name, sound, gestation):
        super(Mammal, self).__init__(species, name, sound)
        self._gestation = gestation

    @property
    def gestation(self):  # <2>
        """Length of gestation period in days"""
        return self._gestation


if __name__ == "__main__":
    mammal1 = Mammal("African lion", "Bob", "Roarrrr", 120)
    print(mammal1.name, "is a", mammal1.species, "--", end=' ')
    mammal1.make_sound()

    print("Number of animals", mammal1.zoo_size())

    mammal2 = Mammal("Fruit bat", "Freddie", "Squeak!!", 180)
    print(mammal2.name, "is a", mammal2.species, "--", end=' ')
    mammal2.make_sound()

    print("Number of animals", mammal2.zoo_size())
    print("Number of animals", Mammal.zoo_size())

    mammal1.kill()
    print("Number of animals", Mammal.zoo_size())

    print("Gestation period of the", mammal1.species, "is", mammal1.gestation, "days")
    print("Gestation period of the", mammal2.species, "is", mammal2.gestation, "days")