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Python: Which practice avoids a common mistake with Type Hints and mypy?

Difficulty:

Medium

Questions:

1

Time Limit:

2 minutes

Passing Score:

100%

Question

Which practice avoids a common mistake with Type Hints and mypy?

  1. Ignore the Type Hints and mypy issue and rely on team discipline instead of clearer APIs or invariants.
  2. Do not add hints mechanically while leaving the real contract vague or the data model under-specified.
  3. Silence the Type Hints and mypy problem by using broad catches, hidden globals, or extra shared mutable state.
  4. Prefer the version of Type Hints and mypy that makes behavior less predictable as long as the code still runs.

Hint

Look for the option that protects correctness instead of hiding the problem.

Answer and rationale

Correct answer: B. Do not add hints mechanically while leaving the real contract vague or the data model under-specified.

Do not add hints mechanically while leaving the real contract vague or the data model under-specified. This is a common failure mode in real Python code and a frequent interview follow-up.

Track: Python