csutherl / pymortgage Goto Github PK

Playing around with python and doing some math with mortgage information. Presenting that data via CherryPy in a RESTful web service and consuming that with D3 charts.

License: Apache License 2.0

Shell 0.14% Python 49.00% JavaScript 50.33% CSS 0.53%

pymortgage's Introduction

pymortgage

The pymortgage application is an application that provides the ability to dynamically compare multiple different types of mortgages. There are lots of different mortgage calculators out there, but I've found none that allow you to do comparisons as granularly as this.

The project source is hosted here http://github.com/csutherl/pymortgage and I deploy a development build as I make major changes to on Openshift here http://pymortgage-csutherl.rhcloud.com. Feel free to visit and test it out!

For the latest version, to contribute, and for more information, please visit the project pages on GitHub, or the Openshift node.

Technologies used

I used this project to learn HTML/CSS/JS with the Bootstrap and D3 charting libraries. In addition to that, I have also increased my understanding of python through this project and learned a bit about Openshift and how it works. The backend API is python which produces the data for the front end UI to chart and display.

Reporting bugs

Please report any bugs or requested enhancements by opening an issue in the GitHub Issue Tracker.

Testing locally

If you'd like to run this locally, clone the current master (development):

git clone git://github.com/csutherl/pymortgage.git

and execute the following commands:

python setup.py install
python pymortgage/server/cherrypy_server.py

This will start the CherryPy server which you can hit by http://localhost:4001 (by default).

pymortgage's People

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pymortgage's Issues

Add mortgage insurance as an input option

Give new mortgages a unique name by default

Like append -1 or -2 to the name automatically.

Chart Doesn't Update When Adding Mortgage

As the title says, the chart doesn't update when I add new mortgages.

Convert year/month numbers to year/month

missing legend pieces

To reproduce, add 2 mortgages, remove one. Look at the single chart that it generates. The legend will have some keys that are "Mortgage N" and "Mortgage N Insurance" and "Mortgage N Taxes". Those need to be refreshed somehow when you remove the second mortgage.

The update button doesn't update summary/table panes

The form starts set to 360 years...

Obviously wrong :)

Add tabs for graph and table

Add tabs on the graph side so that users can switch between table view and graph (this also means that I have to add a table view :))

Change background for selected row

Add extra payments to the form

Loan statistics

Mortgage stats would be nice to have presented instead of calculated on the client side. Things like:

Total interest paid
Total principal (including extra) paid
Total amount paid
Total extra paid
Total interest saved by paying extra(?)
Average projected payment

trying to calc 15 year mortgage borks

  File "/pymortgage/pymortgage/server/amortization_schedule.py", line 139, in create_yearly_schedule
    group_schedule['balance'] = year_end_balance[key]
KeyError: 2

Add bi weekly mortgage types

Clicking the chart should activate the chart tab

Fix term

Term seems to be wrong. Its always year.

mortgage type radio buttons dont update

expand all collapsible by default

Add original loan and down payment options

Need to be able to remove mortgage from chart

As a user, I need to be able to remove a mortgage from the chart.

balance doesn't show up on chart if an error was given when adding mortgage

I did this because I didn't give my mortgage a unique name. btw using Safari.

Add name to form

Remove popup and make it part of the form.

Calls to the year API break

Cherrypy throws a 500 when you try year = 30 on the form. I think it has to do with me creating a monthly and yearly schedule at the same time. Need to review that logic.

Split charts when more than 1 mortgage

We should have 1 chart for one mortgage, 2 charts for 2 mortgages (one for balance and another of other metrics) and for 3+ mortgages, each metric gets its own chart for comparison.

Correct calculation

There is a problem in the calc. Checking against actual numbers, I noticed that I was allowing the amortized amount due to decrease. That doesnt' seem to happen on a real mortgage, so instead of allowing the amount due to decrease, we should take that and apply it as extra payment. That should show that we can actually pay the loan off sooner instead of amortizing every payment all the way to the end :) That is the reason why the chart falls off in the last months/years.