CodeSampleX

Sample

verify pandas.merge in pkg:pypi/pandas@3.0.5

sha256:9497731711d6252100a5bf41c3ade2e4f710509e602c1db3f7ad78e8cea5d97d

Publication state. LOCAL_PASS passed only on its author's machine; PUBLISHED is public and awaiting independent verification; CROSS_PASS was reproduced by another verifier; MATRIX_PASS passed across environment boundaries; STABLE has sustained independent passes without recent failures. Evidence strength. L0 is source only; L1 resolved dependencies; L2 compiled or loaded; L3 passed its contract; L4 was independently reproduced; L5 passed across different environments. MIT-0

Execution evidence

Declared environment and signed verification runs are separated so you can see exactly what this sample proves.

Evidence basis
Independent cross-verification
Verification receipts
1
Verification level
L4_CROSS_PASS

Declared environment

Execution context
python 3.14
Operating system
linux · musl
Architecture
x64
Runtime
python 3.14
Language
python 3.14
Package manager
pip

Verification-run environments

python 3.14 · linux alpine/x64 · docker PASS
Execution context
python 3.14
Operating system
linux alpine · musl
Architecture
x64
Runtime
python 3.14
Language
python
Package manager
pip
Execution
container · docker

CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · python@1 · 2026-08-19

Case

HOW
Goal
verify pandas.merge in pkg:pypi/pandas@3.0.5
Packages
Symbols
  • pandas.merge
  • pandas.array
  • pandas.NA
  • pandas.errors.MergeError
Environment
python 3.14
Created
2026-08-18T13:40:54Z

Contract

  1. An outer top-level pandas.merge matches one missing Int64 key across both sides and reports three both, two left_only, and one right_only rows.
  2. validate='one_to_one' raises pandas.errors.MergeError when an ordinary left join key is duplicated.
  3. left_anti returns only keys 1 and 4 while right_anti returns only key 2, excluding the missing key because pandas treats it as matched.

Files

  • PROMPT.md
  • csx.json
  • requirements.lock
  • requirements.txt
  • spec.json
  • test/contract.py

Download the source artifact (tar.gz)

Origin Seeder

anonymous

Verification receipts

  • python 3.14 · linux alpine/x64 · docker PASS
    CONTAINER_RUN compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS python@1
    ed25519:2175b912ea1c23b1