[Chicago] Python for mortgages???

Lewit, Douglas d-lewit at neiu.edu
Sun May 17 19:16:27 CEST 2015

Hi Jimmy,

Thanks for the feedback!  Right now I mostly work with the Java crowd.
Honestly, nobody in my department has anything positive to say about Python
other than "it looks good on your resume".  One young lady who used to be
the graduate tutor in my department said, "Oh please, Python?  You can
learn Programming I in Python in just 30 minutes!!!  But C, C++ and Java
take work and study!"  But she was an arrogant little know-it-all and
-----.  (I'll let you use your imagination to fill in the blank! )

Personally, I like the "feel" of the "weakly typed" or dynamic languages,
such as Perl, Ruby and Python.  They remind me a lot of Maple and
Mathematica, which provided me with my first experiences in real computer
programming.  Java isn't bad, but I'm not thrilled with how people in my
department teach Java.

I want to flesh out the program a wee bit more.  Add more info to the
tuples, such as the amount of principal paid up to that point, the amount
of interest paid up to that point (or month I mean), and.... I guess that's
it!  I haven't got a clue how this would work for a *variable* rate
mortgage!  That would get VERY complicated!  With a fixed rate mortgage you
know that your payment must be greater than (amount borrowed)*(1 +
rate/1200) or you will never pay off your mortgage.  Your debt would either
remain the same or continue to accumulate more interest and actually get

On Sun, May 17, 2015 at 8:27 AM, Jimmy Calahorrano via Chicago <
chicago at python.org> wrote:

> Doug,
> couple points on this. Have you actually talked to people working on
> Python for years already? If you just talked to Java/C# developers that
> have never used Python then they doesn't know what they are talking about.
> I was one of them (c# developer for about 10 years), i had the tendency to
> under value javascript for example, and little interest on learning python.
> Things changed years ago, and I cannot be more grateful for people and
> situations that ended me working in python.
> Regarding the mortage escrow calculator that you are talking about real
> state companies doesn't calculate them, it is the actual lending company
> that needs to calculate the escrow, on middle size and big ones, they no
> longer use excel, since this is the most basic calculation that they should
> get done. I'd research to find out what features are missing on those
> systems, or if is something else that they need.
> thanks,
> Jimmy
>   ------------------------------
>  *From:* "Lewit, Douglas" <d-lewit at neiu.edu>
> *To:* The Chicago Python Users Group <chicago at python.org>
> *Sent:* Sunday, May 17, 2015 5:45 AM
> *Subject:* [Chicago] Python for mortgages???
> Hey there ladies and gents,
> I'm kind of proud of this, my latest little Python project.  I know my
> Formatter class is very Java-like, but hey, why not?  I've actually had
> more formal training in Java than in Python, so it makes sense that I bring
> a certain amount of the Java paradigm to my Python programming projects,
> which may not necessarily be a bad thing.  In chatting with CS professors
> and others in the community, I still get the feeling that a lot of people
> still think of Java as a "grownup programming language" while Python is
> just good for newbies, kids, and amateur programmers.  It's an attitude
> that I really don't like, and of course most of the people with that
> opinion have not really used Python that much anyhow!  So I kind of enjoy
> exploring the OOP aspects of Python and other pretty heavy-duty aspects of
> Python, demonstrating that it is just as much a grownup programming
> language as Java.  Unfortunately I have not yet explored the web page
> development capabilities of Python, but that is definitely on my to-do list
> for the near future.
> This program asks the question, "If I borrow some money to buy a house at
> a certain interest rate (expressed as a percentage) and if I pay a certain
> amount of money every month, then how many months will it take for me to
> pay off my mortgage?"  Also, what's the total interest going to be?
> I really like the program, but if anyone can suggest something to make it
> even better, then hey, by all means let me know.  But be polite!  I devoted
> a lot of time to this, so please no replies like, "Doug, your program
> sucks!"
> And if you sell my program to some big real estate company, I want a
> percentage of those profits!!!  (I suspect that most realtors use EXCEL to
> solve these exact same problems.)
> Enjoy the rest of your weekend and I'm looking forward to reading your
> feedback and criticisms.
> Cheers,
> Douglas Lewit
> P.S.  I probably should have used Python 3 for this, but I went ahead with
> Python 2 for this project.  Sorry guys, but if you run my script with
> Python 3 it definitely won't run!  The print statement won't work and
> neither will the generators.
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