Skip to main content

eyekind

DOI PyPI

eyekind is a Python rule language with forward and backward reasoning and checkable proofs. You write facts and rules in plain Python; eyekind draws conclusions, and every conclusion can come with a proof that a separate checker verifies against your program. It runs as a command-line program, a Python library, and a browser application, with no dependencies.

  • Playground: run programs in your browser.
  • Guide: run programs, write rules, check proofs, use the library, and develop eyekind.
  • Specification: the language, its canonical text, the proof format, and the C1–C8 checks.
  • Examples: 94 runnable programs, each with a card deck and saved conclusions, proofs and check reports.
  • Conformance suite: 400 cases that test any implementation of the specification through its command line.
fact(type('socrates', 'human'))
fact(subclass_of('human', 'mortal'))
implies([type(S, A), subclass_of(A, B)], type(S, B))
query(type(X, Y))

Install it with pip install eyekind for the eyekind command, or run it from a checkout with bin/eyekind.py or python -m eyekind:

python -m eyekind examples/socrates.py
python -m eyekind -c examples/socrates.py
python -m eyekind --proof examples/socrates.py > /tmp/proof.py
python -m eyekind --check-proof /tmp/proof.py examples/socrates.py

MIT licensed; see LICENSE.md.

Metadata

Release files for eyekind 0.7.0

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for eyekind 0.7.0
File Size Uploaded Provenance Actions
eyekind-0.7.0.tar.gz 124.5 kB With provenance Details for eyekind-0.7.0.tar.gz

Built distribution (wheel)

Table of built distributions (wheels) for eyekind 0.7.0
File Interpreter ABI Platform Actions
eyekind-0.7.0-py3-none-any.whl Python 3 none any Details for eyekind-0.7.0-py3-none-any.whl

Total release size: 197.9 kB

Release files / eyekind-0.7.0.tar.gz

Download URL eyekind-0.7.0.tar.gz
Size 124.5 kB
Tags Source
SHA-256 checksum
How to use checksums
60fa013a175e434924e3eda13b47f9310a594c2900e59c01f5bb480621f758a5
BLAKE2b-256 checksum
How to use checksums
e3208bc6a3b7923e66a09b39f5271c718c54dbdbd397884dbd8507a01d27cc70
Upload date
Uploaded using Trusted Publishing?
What is trusted publishing?
Yes
Uploaded via twine/7.0.0 CPython/3.13.16

Provenance

Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.

PyPI Publish Attestation

PyPI verified that this artifact, at this checksum, originated from the publisher listed below.

Signed by GitHub Actions, verified by PyPI on Nov 5, 2026.

Transparency log

Release files / eyekind-0.7.0-py3-none-any.whl

Download URL eyekind-0.7.0-py3-none-any.whl
Size 73.4 kB
Tags Python 3
SHA-256 checksum
How to use checksums
7f644a0aa9e73528ebed9124288368a15658324f8ec8ad3e03310a45f3e3ab01
BLAKE2b-256 checksum
How to use checksums
39608a717bac0b46703d05db2216cc2128846332072444b5f52606b7615e0f72
Upload date
Uploaded using Trusted Publishing?
What is trusted publishing?
Yes
Uploaded via twine/7.0.0 CPython/3.13.16

Provenance

Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.

PyPI Publish Attestation

PyPI verified that this artifact, at this checksum, originated from the publisher listed below.

Signed by GitHub Actions, verified by PyPI on Nov 5, 2026.

Transparency log

Security for eyekind 0.7.0

Provenance

Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.

Full provenance

All 2 files in this release have been uploaded with provenance metadata.

Select from 2 files

Attestation for eyekind-0.7.0.tar.gz

PyPI Publish Attestation

PyPI verified that this artifact, at this checksum, originated from the publisher listed below.

Signed by GitHub Actions, verified by PyPI on Nov 5, 2026.

Transparency log

A note on package security

PyPI is a repository for distributing packages, not a service for auditing them. While third-party security researchers and our staff do their best to detect and remove malicious packages, PyPI cannot guarantee the quality, security or suitability of any given package.

To learn more about protecting yourself from malicious actors, visit our package security documentation.

Release history Release notifications | RSS feed

This release

0.7.0 This release

2 release files Full provenance

Anthropic, PBC Visionary sponsor Bloomberg Visionary sponsor Hudson River Trading Visionary sponsor Meta Visionary sponsor NVIDIA Visionary sponsor Microsoft Sustainability sponsor Depot Continuous Integration AWS Cloud computing and Security Sponsor Datadog Monitoring Fastly CDN Google Download Analytics Sentry Error logging StatusPage Status page