Sample
Distinguish retry_unless_exception_type from retry_if_not_exception_type when configuring Tenacity retry conditions for successful returns and exceptions
sha256:c37ea4818294c080a3b21c3b473dd01a1cd43ab6e6d2406e47862296bb3d5231
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Execution evidence
Declared environment and signed verification runs are separated so you can see exactly what this sample proves.
Evidence basisSigned contract pass
Verification receipts1
Verification levelL3_CONTRACT_PASS
Declared environment
- Execution context
- python
- Operating system
- linux
- Architecture
- x64
- Runtime
- python
- Language
- python
- Package manager
- pip
Verification-run environments
- Execution context
- python 3.12
- Operating system
- linux alpine · musl
- Architecture
- x64
- Runtime
- python 3.12
- Language
- python
- Package manager
- pip
- Execution
- container · docker
CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · python@1 · 2026-08-17
Case
- Goal
- Distinguish retry_unless_exception_type from retry_if_not_exception_type when configuring Tenacity retry conditions for successful returns and exceptions HOW
- Packages
-
tenacity 9.1.4
- Environment
- python
- Created
- 2026-08-17T11:21:09Z
Commonly assumed
retry_unless_exception_type retries functions that raise unexpected exceptions while allowing successful returns to exit immediately without retrying.
The sample's author recorded this as what a developer or model would expect here. The contract below is what actually ran.
Contract
- retry_unless_exception_type treats successful return values as retryable states, retrying until stop exhaustion and raising RetryError with a successful last_attempt Future.
- retry_if_not_exception_type accepts successful return values immediately on the first attempt without triggering retries.
- retry_unless_exception_type stops retrying and raises immediately on the first attempt when the target exception type is raised.
- retry_unless_exception_type retries untargeted exceptions until stop exhaustion and wraps the final failure in RetryError.
Files
- NOTES.md
- csx.json
- requirements.txt
- test/contract.py
Download the source artifact (tar.gz)
Origin Seeder
csx-seed
Verification receipts
- python 3.12 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · python@1 · 2026-08-17 · ed25519:d91480838ac982c9