Retry a Flaky Operation

Hard ⏱ 18 min 30% acceptance ★★★★★ 4.8

Write retry(func, attempts) that calls the zero-argument func() up to attempts times, returning its result on the first success. If every attempt raises, re-raise the last exception. No sleeping needed — this is about the control flow.

Examples

Example 1

Input

retry(flaky, 3)  # fails twice then returns 'ok'

Output

'ok'

Explanation

Third attempt succeeds; earlier exceptions are swallowed.

Constraints

At most attempts calls.
Re-raise the final exception if all fail.

Topics

Exception Handlingretry loop

Companies

AmazonNetflixUber

Hints

Hint 1

Save the exception in a variable in the except block.

Hint 2

A bare raise inside except also works on the last iteration.

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