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Consider using release 0.41.2 instead.
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basilisk-python 0.35.0

Basilisk — the only Python type checker scoring 100% on the official python/typing conformance suite (https://github.com/python/typing/blob/main/conformance/results/results.html) — and the fastest we've measured. Complete open-source Python dev environment in Rust: type checker, language server, debugger, profiler, plus VS Code, Cursor, Zed & Neovim extensions. Strict by default.

pip install basilisk-python==0.35.0

Basilisk

Basilisk is the only Python type checker scoring 100% on the official python/typing conformance suite — and the fastest we've measured. A complete, open-source Python development environment in Rust: type checker, language server, debugger, profiler, plus VS Code, Cursor, Zed & Neovim extensions. Strict by default.

Website: https://www.basilisk-python.dev
Conformance: https://www.basilisk-python.dev/docs/conformance/
Source: https://github.com/Nimblesite/Basilisk

This package (basilisk-python) bundles the native basilisk binary as a Python wheel so it can be installed with pip/uv. It is the same binary distributed via GitHub Releases, Homebrew and Scoop — the wheel is a convenience for Python-managed environments, not a separate build.

The distribution is named basilisk-python because the name basilisk was already taken on PyPI. The installed command is still basilisk.

Install

pip install basilisk-python
# or
uv tool install basilisk-python

Use

basilisk check path/to/your_code.py
basilisk --version

Machine-readable output for tooling:

basilisk check path/to/your_code.py --output json --color never

Acknowledgments

The bundled binary is built on Ruff by Astral (MIT) and typeshed (Apache-2.0), among other open-source projects. Full third-party notices: https://github.com/Nimblesite/Basilisk/blob/main/NOTICES.

License

MIT

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basilisk_python-0.35.0-py3-none-win_arm64.whl (5.5 MB view details)

Uploaded Jul 15, 2026 Python 3Windows ARM64

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