Author here. I thought was doing what I was supposed to do by using Decimals heavily in my credkit[0] Python library, but I did some testing and discovered it wasn't worth the pain for me. Test code [1] is available for the curious.
The moral of the story is that "best practices" are not a substitute for using your brain.
I enjoyed reading this! It's not always possible but finance data that translates directly into cents/euro-cents/pence/yen/etc is really nice to work with as integers. Obviously as soon as you need to divide that stops being such a solid strategy though. . .
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[ 3.4 ms ] story [ 16.7 ms ] threadThe moral of the story is that "best practices" are not a substitute for using your brain.
[0]: https://github.com/jt-hill/credkit
[1]: https://gist.github.com/jt-hill/839e1a6c51d28cbcb8fc69e61431...