Sample
pytest 9.0.3: Verify pytest.approx tolerance scaling around zero, boolean strictness, and structure restrictions
Verified sample for pypi pytest 9.0.3: Verify pytest.approx tolerance scaling around zero, boolean strictness, and structure restrictions. The contract ran…
sha256:3cf69ad82bb42e948a1be82b3117d63fd8dd8997142061e59df15860347c883a
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MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
python linux x64 python python pip
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| python 3.12 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · python@1 |
2026-08-17 |
| python 3.12 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · python@1 |
2026-08-18 |
Case
HOW- Goal
- Verify pytest.approx tolerance scaling around zero, boolean strictness, and structure restrictions
- Packages
- Symbols
-
- pytest.approx
- Environment
- python
- Created
- 2026-08-17T20:35:25Z
Contract
- pytest.approx(0.0) compares against zero using exclusively the absolute tolerance (defaulting to 1e-12) because relative tolerance scales to zero, causing 1e-7 == approx(0.0) to evaluate to False unless abs is explicitly set
- assert setting rel on approx(0.0) has no effect on zero comparisons while abs adjusts the allowable delta
- assert approx comparison against non-zero values uses relative tolerance scaled by the expected value
- assert approx rejects boolean-to-integer equality coercion returning False for 1 == approx(True)
- assert approx supports element-wise comparison between tuples and lists but rejects nested dictionaries and nested sequences with TypeError
- assert approx requires nan_ok=True to match float nan values
Files
- NOTES.md
- csx.json
- requirements.txt
- src/__init__.py
- src/comparator.py
- test/contract.py