Lesson·difficulty 2/5·~15 min
Aggregate traffic by endpoint
Read the task → edit your code → Run to see the output → Run tests to check your answer.
Implement bytes_by_endpoint(packets).
Each packet record has a string endpoint and non-negative integer bytes. Return total bytes per endpoint. Repeated packets are separate observed traffic and count separately. Empty input returns {}.
Before coding, predict one result by hand. After the tests pass, explain your approach and add a boundary example of your own.
Tests
- Case 1
- Case 2
- Case 3
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