Python Interview Questions · interview question

Which practice avoids a common mistake with Import System and sys.modules?

Multiple choiceMediumpython-interview-2026interviewpythonpitfall

Ignore the Import System and sys.modules issue and rely on team discipline instead of clearer APIs or invariants.Do not assume importing a module twice reruns its top-level code as though the interpreter had never seen it before.Silence the Import System and sys.modules problem by using broad catches, hidden globals, or extra shared mutable state.Prefer the version of Import System and sys.modules that makes behavior less predictable as long as the code still runs.

Answer and explanation

Correct answer

B. Do not assume importing a module twice reruns its top-level code as though the interpreter had never seen it before.

Why

Do not assume importing a module twice reruns its top-level code as though the interpreter had never seen it before. This is a common failure mode in real Python code and a frequent interview follow-up.

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Which practice avoids a common mistake with Import System and sys.modules?

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