finance — a reasoning module

Loan offers compared, and interest and value calculated, as a DKE Python module you compile into your own store. It is not financial advice. You record offers by borrower, principal, payment and months, and budgets by a payment limit; it concludes which offer is the cheapest in total of those that share a borrower and a principal and which carry a payment over the limit, each with its proof and with the premise that failed, and marks an offer without dropping it. It calculates the amortised payment, compound interest, the effective annual rate, the exact doubling time beside the rule of 72, present value, a value in today's money and the real rate, in reals and not in cents.

Licence: MIT. Current version: 1.0.2, released in rev 144.

Get it

The whole release, as one archive:

curl -O https://dke.langsyn.com/source/finance/1.0.2/finance-1.0.2.tar.gz

Its SHA-256: 59705a8d72773b4a6b2886557093d657032cbfc58aa7b7b77b2c09ba163e1b92.

Or browse version 1.0.2 file by file. /source/finance/latest/ always redirects to the current version. A release's files never change. When the next release supersedes this one, this version stays served at its URL, marked superseded, so cite the version and the archive's digest to say exactly which bytes you read, and use latest for a link that follows each new release.

Current release