I (obviously) agree. For clarity: I’m the person who started this thread, and also the creator of friendly. friendly was an offshoot of AvantPy, which I mentioned in a previous message. AvantPy, currently put on hold, has [even more custom error messages].(Friendly error messages — AvantPy 0.0.15a documentation). Currently, AvantPy is “broken” due to changes to friendly, but I plan to restart it soon, making sure that it can use friendly/friendly-traceback.