Sample
pyarrow 25.0.1: PyArrow Table integer indexing selects columns rather than rows while len(table) returns row count, slice indexing flips to row slicing, and column selection by list raises TypeError unless select() is used
Verified sample for pypi pyarrow 25.0.1: PyArrow Table integer indexing selects columns rather than rows while len(table) returns row count, slice indexing…
sha256:256773321b98eae577fe17bcb5eb96a79b0d3bfd7f053fd619c1ba9a1922e4c3
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
- PyArrow Table integer indexing selects columns rather than rows while len(table) returns row count, slice indexing flips to row slicing, and column selection by list raises TypeError unless select() is used
- Packages
- Symbols
-
- pyarrow.table
- pyarrow.Table
- pyarrow.Table.__getitem__
- pyarrow.Table.slice
- pyarrow.Table.select
- pyarrow.Table.filter
- pyarrow.record_batch
- pyarrow.RecordBatch
- pyarrow.ChunkedArray
- pyarrow.compute.equal
- pyarrow.compute.invert
- Environment
- python
- Created
- 2026-08-17T02:16:01Z
Contract
- assert len(table) == 5 and len(list(table)) == 2 and isinstance(table[0], pa.ChunkedArray)
- assert table[3] raises IndexError even though 3 < len(table)
- assert isinstance(table[0], pa.ChunkedArray) and isinstance(table[0:1], pa.Table)
- assert table[['a']] raises TypeError and table.select(['a']).column_names == ['a']
- assert isinstance(table[0], pa.ChunkedArray) and isinstance(batch[0], pa.Array)
- assert len(table.filter(pc.equal(table['a'], 20))) + len(table.filter(pc.invert(pc.equal(table['a'], 20)))) == 4 != len(table)
Files
- NOTES.md
- csx.json
- requirements.lock
- requirements.txt
- test/contract.py