[Currency Exchange] - last exercises too complex #2946
Description
https://exercism.org/tracks/python/exercises/currency-exchange
The last two methods you have to create: exchangeable_value and non_exchangeable_value - are both far too complicated in their requirements.
I struggled to understand what was going on when I did them (I'm proficient at Python), and both of the friends I'm mentoring struggled as well, and we all three of us have at least a Masters in a STEM subject! I'm not bragging about our education there; I'm saying that if multiple people with advanced technical degrees struggle on a "learning" exercise, it's far too complicated for something that's meant to be teaching a basic concept.
When I look at it now a few months later, including my solution, I still have no idea what they're doing without spending a few minutes staring at them.
I would instead suggest it's worth demonstrating things like:
If you apply the following operators (* + -) to two ints, you get an int back, but apply / to two ints and you get a float back. That kind of thing.