For example I might do something like this.  One could argue this is not describing an "is a" relationship i.e. how can each member of the landing party be a "ship".

I'm saying we internalize our type inheritance and "is a" might not apply in quite the same way in this particular knowledge domain.  Keep an open mind.

# -*- coding: utf-8 -*-
"""
Created on Wed Apr 20 14:56:55 2016

@author: Kirby Urner

10 Cloverfield Lane,
Nowhere, Nebraska

"""
import random

class MotherShip:
   
    attack_mode = False

    # note to self, need to learn more Earthling names

    earthling_names = ['Alan', 'Helga', 'Ahmed', 'Jerome', 'Achio', 'Kelly']
   
    @classmethod
    def toggle(M):
        if M.attack_mode:
            M.attack_mode = False;
        else:
            M.attack_mode = True
   
    @classmethod
    def spawn(M, n):  # size of pod
        pod = []
        for _ in range(n):
            pod.append(M()) # blessings
        return pod
           
    def __init__(self):  # rarely used except by spawn
        self.name = random.choice(self.__class__.earthling_names)
       
    def __repr__(self):
        return self.name   # we each feel empowered by the whole!
       
# ship lands...

landing_party = MotherShip.spawn(10)  # spawn a swarm of little selves
print("Landing Party:", landing_party)

print("Hostile?: ", landing_party[3].attack_mode)

# what hath triggered their ire?  Everything was going so well...

MotherShip.toggle()  # each self has a shared collective hive mind

print("Hostile?: ", landing_party[3].attack_mode)  # uh oh...

=== Anaconda.console (blank rows added for readability):

runfile('/Users/kurner/Documents/classroom_labs/martians_landed.py', wdir='/Users/kurner/Documents/classroom_labs')

Landing Party: [Kelly, Kelly, Achio, Kelly, Jerome, Alan, Alan, Helga, Achio, Alan]

Hostile?:  False

< some triggering event? >

Hostile?:  True