Sample
structlog 26.1.0: Inject context variables into structlog loggers with merge_contextvars, scoped lifecycles, and asynchronous task isolation
Verified sample for pypi structlog 26.1.0: Inject context variables into structlog loggers with merge_contextvars, scoped lifecycles, and asynchronous task…
sha256:6dec637d6343afe74048a5fc63a4dfef59e139a0fac7ba3e70880f3c05d653fa
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
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
- Inject context variables into structlog loggers with merge_contextvars, scoped lifecycles, and asynchronous task isolation
- Packages
- Symbols
-
- structlog.contextvars.merge_contextvars
- structlog.contextvars.bind_contextvars
- structlog.contextvars.bound_contextvars
- structlog.contextvars.reset_contextvars
- structlog.contextvars.unbind_contextvars
- structlog.contextvars.clear_contextvars
- structlog.contextvars.get_contextvars
- structlog.contextvars.get_merged_contextvars
- Environment
- python
- Created
- 2026-08-17T19:44:47Z
Contract
- Calling bind_contextvars has no effect on log output unless merge_contextvars is explicitly present in the processor chain, and bound logger fields override conflicting context variables.
- bound_contextvars restores previous context values upon block exit or exception while preserving unrelated keys.
- reset_contextvars with tokens returned by bind_contextvars restores previous variable bindings.
- unbind_contextvars deletes specified keys and clear_contextvars removes all context variables.
- get_merged_contextvars returns current contextvars merged with bound logger context without mutating either.
- Concurrent asyncio tasks inherit parent contextvars but mutate their context in complete isolation without leaking to siblings or the parent.
Files
- NOTES.md
- csx.json
- pyproject.toml
- requirements.lock
- requirements.txt
- test/contract.py