Pythonic Data Processing · interview question
A bug appears around list comprehensions. What is the strongest first debugging move?
Multiple choiceEasychapter-8-curatedpremiumpythonic-data-processinglist-comprehensions
valid_skus = [row["sku"] for row in rows if row["quantity"] > 0]Answer and explanation
Correct answer
A. Trace one concrete example, inspect the state transitions, and compare them to the intended rule before rewriting anything.
Why
That approach is reliable because it creates evidence. If the comprehension becomes a maze of conditions and nested logic, the code stops being a clarity win.
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