Reading a traceback
Reading it from the bottom, finding your own frame in it, and turning the exception type and message into the next thing to check.
We mark it against a checklist you can read first
What counts as knowing this
Locate the cause of a failure from its traceback and say which line is at fault
A check for this one skill
Up to 2 questions on this skill alone, marked against the bar beside this. It stops as soon as the answer is clear. No account, and your answers are not kept.
Where it sits
Helpful, but not required
What it unlocks
Start on Python Fundamentals
Every skill above, ordered by what depends on what, with the projects above that as the evidence you actually did it. We work out where you already are first, so the path skips what you can do.
Start this path