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In pytest, how do you correctly register a finalizer function named teardown within a fixture using the request object?

easy📝 Syntax Q3 of 15
PyTest - Fixtures
In pytest, how do you correctly register a finalizer function named teardown within a fixture using the request object?
Arequest.finalizer(teardown())
Brequest.addfinalizer(teardown)
Crequest.addfinalizer(teardown())
Drequest.finalize(teardown)
Step-by-Step Solution
Solution:

  1. Step 1: Understand addfinalizer usage

    The request.addfinalizer method expects a callable (function) without parentheses.

  2. Step 2: Avoid calling the function immediately

    Passing teardown() calls the function immediately, which is incorrect.

  3. Final Answer:

    request.addfinalizer(teardown) -> Option B

  4. Quick Check:

    Function passed without parentheses [OK]
Quick Trick: Pass function name without parentheses to addfinalizer [OK]
Common Mistakes:
MISTAKES
  • Calling the cleanup function immediately by adding parentheses
  • Using incorrect method names like finalizer or finalize
  • Passing a non-callable object to addfinalizer

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