CraigMason19/music_theory ? reverse-engineered prompt

Build me a small Python package that helps me learn music theory by working things out for me.

I want it to handle note transposition, interval distances, building scales from different formulas, finding all the modes of a note, and listing the chords in a key, including parallel chords and dominant seventh chords. It should also be able to turn roman numeral progressions into the right chords. Please make it easy to use from a simple main file, and include a few tests for the core theory logic.

Keep it lightweight since no extra packages are needed. I’d also like the output to be easy to read when I print a scale or key, like the examples in the README. If anything is unclear, use the README as the guide and look up current docs online if you need to.