Sample
pandas 3.0.5: Match missing Int64 join keys with DataFrame.merge and validate their key cardinality
Verified sample for pypi pandas 3.0.5: Match missing Int64 join keys with DataFrame.merge and validate their key cardinality. The contract ran on python 3.12…
sha256:bcad84af5a7a444a332c8510e62933efa13ab58d9ca715a49afc7a0c95b2d6e8
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 3.12 linux · musl x64 python 3.12 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
- Match missing Int64 join keys with DataFrame.merge and validate their key cardinality
- Packages
- Symbols
-
- pandas.array
- pandas.DataFrame.merge
- pandas.errors.MergeError
- Environment
- python 3.12
- Created
- 2026-08-17T02:15:22Z
Contract
- With two missing Int64 keys on each side, an inner DataFrame.merge returns four missing-key rows containing every left/right pair.
- validate='one_to_one' raises pandas.errors.MergeError when the only duplicate keys on both sides are missing values.
- After each side is reduced to one missing key, validate='one_to_one' succeeds and returns one missing-key match.
Files
- NOTES.md
- csx.json
- requirements.lock
- requirements.txt
- test/contract.py