Pythonic Data Processing · interview question
If you wrote a test around set comprehensions, what should the test prove first?
Multiple choiceMediumchapter-8-curatedpremiumpythonic-data-processingset-comprehensions
duplicate_regions = {row["region"] for row in rows if row["needs_review"]}Answer and explanation
Correct answer
A. That the rule behaves correctly at the boundary cases the lesson is trying to make explicit.
Why
Good tests make the design safer to change because they lock in the meaningful behavior rather than surface-level implementation details.
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