Python Interview Questions · interview question
Which practice avoids a common mistake with __slots__?
Multiple choiceMediumpython-interview-2026interviewpythonpitfall
Answer and explanation
Correct answer
B. Do not add __slots__ blindly when the class relies on dynamic attributes, multiple inheritance complexity, or framework behavior that expects __dict__.
Why
Do not add __slots__ blindly when the class relies on dynamic attributes, multiple inheritance complexity, or framework behavior that expects __dict__. This is a common failure mode in real Python code and a frequent interview follow-up.
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