Sample
pyarrow 25.0.1: PyArrow CSV ingestion retains null tokens in string columns as literal strings unless strings_can_be_null is enabled in ConvertOptions, and raises KeyError for unlisted columns unless include_missing_columns is set
Verified sample for pypi pyarrow 25.0.1: PyArrow CSV ingestion retains null tokens in string columns as literal strings unless strings_can_be_null is enabled…
sha256:96f7e54f838dd5fd2cca97dba04561e3bf2ad30732280f3e451fb70e770b6729
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 CSV ingestion retains null tokens in string columns as literal strings unless strings_can_be_null is enabled in ConvertOptions, and raises KeyError for unlisted columns unless include_missing_columns is set
- Packages
- Symbols
-
- pyarrow.csv.read_csv
- pyarrow.csv.ConvertOptions
- pyarrow.csv.ParseOptions
- pyarrow.csv.ReadOptions
- pyarrow.csv.InvalidRow
- Environment
- python
- Created
- 2026-08-17T10:42:07Z
Contract
- CSV columns inferred as strings preserve tokens matching null_values as literal strings unless strings_can_be_null is explicitly set to True, whereas numeric columns convert them to nulls by default.
- assert tbl_default['num'].null_count == 2 and tbl_default['txt'].null_count == 0
- assert tbl_nulls['txt'].to_pylist() == ['hello', None, 'world', None]
- assert tbl_no_quoted['txt'].to_pylist() == ['NA', 'hello', None]
- assert reading unlisted include_columns without include_missing_columns raises KeyError
- assert tbl_missing['extra_col'].type == pa.null() and tbl_typed_missing['extra_col'].type == pa.int32()
- assert isinstance(tbl_dict['category'].type, pa.DictionaryType)
- assert csv.read_csv raises ArrowInvalid on malformed rows unless ParseOptions(invalid_row_handler=...) returns 'skip'
- assert tbl['flag'].type == pa.bool_() and tbl['status'].to_pylist() == [None, 'PENDING', None]
Files
- NOTES.md
- csx.json
- requirements.lock
- requirements.txt
- test/contract.py