I also don't show real code right away. I scribble on the white board. class MotherShip; ... yeah, that's correct, but to me it looks too wordy for what is a fairly simple concept. hmm... simple? ok, inheritance is the concept that I think is fairly simple if you don't dive into all the other neat stuff. Once they see the elegance of talks=self.get_list_of_talks_to_process() for talk in talks: self.work(talk) their eyes light up and I let them bask in the benefits of elegant programming. After that, I think they will be receptive to learn all that other neat stuff on their own. On Wed, Apr 20, 2016 at 5:19 PM, kirby urner <kirby.urner@gmail.com> wrote:
Our classes often behave a lot more like objects with a life of their own.
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
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