[Edu-sig] more simmering debate...

[Carl Karsten]

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 at 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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