Editor

Average of Messy Input

Beginner · Write the code · from 50 Python Practice Problems with Instant Answer Checking (Beginner to Advanced)

From the lesson: 50 Python Practice Problems with Instant Answer Checking (Beginner to Advanced)

Fifty problems, each with a code editor and real tests. Write your solution, press Check, and see exactly which cases pass. Stuck? Hints reveal one at a time, and the solution unlocks once you have checked at least once. Your code and progress are saved in this browser.

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Data from a form arrives as strings, and some are junk. Write safe_average(values) that converts each value to a float, skips anything that cannot be converted, and returns the average rounded to 2 decimals. If nothing is valid, return None.

safe_average(["4", "x", "5.5", ""])  ->  4.75
def safe_average(values):
pass
Solution unlocks after your first Check

What Check runs

Your code runs first, then each of these lines. The output must match exactly.

RunsExpected output
safe_average(["4", "x", "5.5", ""])4.75
print(safe_average(["n/a", "?"]))None

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