Your question is Average Calculation in a Pipeline. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You're working on a simple data pipeline task and want to implement a small transformation step in Python before wiring it into a larger workflow.
Write a Python function to calculate the average of a list of numbers.