[Tutor] Structure of my simulation / monte-carlo

[Dave Angel]

(This is too hard to follow, so I'm just going to respond to Kent's 
subsequent email.  If I missed anything from here, please quote it more 
reasonably)

Vincent Davis wrote:
> Kent Johsnon writes
> "This class has a lot of responsibilities:
> - create applicants
> - create institutions
> - run a single match
> - run multiple matches
> - calculate statistics on the result of multiple matches
> A principle of object-oriented design is that a class should have a
> single responsibility. I would break your class up a bit using
> multiple classes, perhaps."
>
> I am trying to do what you recomend, as much as makes sense to me, but that
> is why I ask the question so I should consider your answer.
> This is what I hear you saying, (I don't mean to represent them as
> sub-classes but more how they would operate on each other) Should I consider
> making Institutions) a subclass of (Make Institutions)? I can't think of
> anything that would make sense to inherit.
>
> class Simulation:
>     class Create Institutions:
>         class Institutions:
>     class create Applicants:
>         class Applicants:
>     class Match:
>     class Multi Match:
>
> I add I am thinking
>
> class Simulation:
>     def__init__:(self, results, stats.....repeat..)
>     def create_applicants():
>         class Applicants
>     def creat_institutions():
>         class Institutions
>     def one_simulation(): # one or more
>         create_applicants()
>         create_institutions()
>         class Match()
>         class Results
>     def repeat_simulation()
>         repeat one_simulations
>         class Results
>
> After writing this out I now think you are right, more classes. Which means
> I really need to play with function objects to understand how they are
> passed down the layers
>
> Simulation(GPA = random.gauss(50, 10), repeat = 100.....)
>     MakeApplicants(GPA)
>         Applicants(GPA)  # I need to make sure the GPA is calculated at each
> applicant not back at Simulation.
>
> DaveA
> ask if it will always be random.gauss? No, I would like it to be anything
> from a constant to a much more complex function)
>
> DaveA
> "I would caution you that each instance of RepeatMatch will then hold lots
> of the other members, so keeping them around could be expensive"
>
> This means they stay in memory? Is there a way to know how much room a
> instance takes up, in memory or hard drive?
> I could serialize them a save them to a sqlite when done with a simulation
> correct? How is a questions for later.
>
> "worried that you might find my responses too complex"
> I am kinda working in a vacuum, with respect to python programing. Complex
> and difficult are ok, The challenge is not knowing what I don't know. I need
> to practice with function objects and run a few experiments still to make
> sureI understand them.
>
> DaveA and Kent Thanks for all your help, Vincent
> To add a little more to what I am doing I am using CherryPy to host this
> simulation. So the GPA function and other simulation variables can be
> entered in a html form and passed to the Simulation class. Then I am
> calculating results as well as using matplotlib to make some plots, these
> results and plots then get show. I think I have most of the CherryPy stuff
> figured out once I have the Simulations class setup to do the whole thing.
> The only part with CherryPy I am still working on is displaying progress on
> the browser as the simulations runs, it can take several minutes.
>
> Thanks
> Vincent Davis
> 720-301-3003
>
>   
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