0.17.1

## Release Notes

Released on 2026-10-15.

### Preview features

- \[`pycodestyle`\] Don't treat `None`, `True`, or `False` as keywords (`E271`-`E274`) ([#29322](https://github.com/astral-sh/ruff/pull/29322))

### Bug fixes

- Fix dedent with multiple leading comments ([#29382](https://github.com/astral-sh/ruff/pull/29382))
- \[`flake8-pyi`\] Detect legacy positional-only parameters in `__new__` methods (`PYI063`) ([#28502](https://github.com/astral-sh/ruff/pull/28502))
- \[`flake8-pyi`\] Fix false positives on quoted annotations (`PYI036`) ([#29274](https://github.com/astral-sh/ruff/pull/29274))
- \[`perflint`\] Avoid invalid comprehension suggestions (`PERF401`, `PERF403`) ([#29366](https://github.com/astral-sh/ruff/pull/29366))

### Rule changes

- Treat more `collections` and `weakref` containers as mutable ([#29213](https://github.com/astral-sh/ruff/pull/29213))

### Documentation

- \[`flake8-import-conventions`\] Update default and example `aliases` ([#29333](https://github.com/astral-sh/ruff/pull/29333))

### Contributors

- [@fixfon](https://github.com/fixfon)
- [@mmaxjr](https://github.com/mmaxjr)
- [@joshuavetos](https://github.com/joshuavetos)
- [@nekomario28](https://github.com/nekomario28)
- [@ntBre](https://github.com/ntBre)
- [@shan3520](https://github.com/shan3520)

## Install ruff 0.17.1

### Install prebuilt binaries via shell script

```sh
curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-installer.sh | sh
```

### Install prebuilt binaries via powershell script

```sh
powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-installer.ps1 | iex"
```

## Download ruff 0.17.1

|  File  | Platform | Checksum |
|--------|----------|----------|
| [ruff-aarch64-apple-darwin.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-aarch64-apple-darwin.tar.gz) | Apple Silicon macOS | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-aarch64-apple-darwin.tar.gz.sha256) |
| [ruff-x86_64-apple-darwin.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-x86_64-apple-darwin.tar.gz) | Intel macOS | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-x86_64-apple-darwin.tar.gz.sha256) |
| [ruff-aarch64-pc-windows-msvc.zip](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-aarch64-pc-windows-msvc.zip) | ARM64 Windows | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-aarch64-pc-windows-msvc.zip.sha256) |
| [ruff-i686-pc-windows-msvc.zip](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-i686-pc-windows-msvc.zip) | x86 Windows | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-i686-pc-windows-msvc.zip.sha256) |
| [ruff-x86_64-pc-windows-msvc.zip](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-x86_64-pc-windows-msvc.zip) | x64 Windows | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-x86_64-pc-windows-msvc.zip.sha256) |
| [ruff-aarch64-unknown-linux-gnu.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-aarch64-unknown-linux-gnu.tar.gz) | ARM64 Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-aarch64-unknown-linux-gnu.tar.gz.sha256) |
| [ruff-i686-unknown-linux-gnu.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-i686-unknown-linux-gnu.tar.gz) | x86 Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-i686-unknown-linux-gnu.tar.gz.sha256) |
| [ruff-powerpc64le-unknown-linux-gnu.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-powerpc64le-unknown-linux-gnu.tar.gz) | PPC64LE Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-powerpc64le-unknown-linux-gnu.tar.gz.sha256) |
| [ruff-riscv64gc-unknown-linux-gnu.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-riscv64gc-unknown-linux-gnu.tar.gz) | RISCV Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-riscv64gc-unknown-linux-gnu.tar.gz.sha256) |
| [ruff-s390x-unknown-linux-gnu.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-s390x-unknown-linux-gnu.tar.gz) | S390x Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-s390x-unknown-linux-gnu.tar.gz.sha256) |
| [ruff-x86_64-unknown-linux-gnu.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-x86_64-unknown-linux-gnu.tar.gz) | x64 Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-x86_64-unknown-linux-gnu.tar.gz.sha256) |
| [ruff-armv7-unknown-linux-gnueabihf.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-armv7-unknown-linux-gnueabihf.tar.gz) | ARMv7 Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-armv7-unknown-linux-gnueabihf.tar.gz.sha256) |
| [ruff-aarch64-unknown-linux-musl.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-aarch64-unknown-linux-musl.tar.gz) | ARM64 MUSL Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-aarch64-unknown-linux-musl.tar.gz.sha256) |
| [ruff-i686-unknown-linux-musl.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-i686-unknown-linux-musl.tar.gz) | x86 MUSL Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-i686-unknown-linux-musl.tar.gz.sha256) |
| [ruff-x86_64-unknown-linux-musl.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-x86_64-unknown-linux-musl.tar.gz) | x64 MUSL Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-x86_64-unknown-linux-musl.tar.gz.sha256) |
| [ruff-arm-unknown-linux-musleabihf.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-arm-unknown-linux-musleabihf.tar.gz) | ARMv6 MUSL Linux (Hardfloat) | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-arm-unknown-linux-musleabihf.tar.gz.sha256) |
| [ruff-armv7-unknown-linux-musleabihf.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-armv7-unknown-linux-musleabihf.tar.gz) | ARMv7 MUSL Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.17.1/ruff-armv7-unknown-linux-musleabihf.tar.gz.sha256) |

## Verifying GitHub Artifact Attestations

The artifacts in this release have attestations generated with GitHub Artifact Attestations. These can be verified by using the [GitHub CLI](https://cli.github.com/manual/gh_attestation_verify):
```sh
gh attestation verify <file-path of downloaded artifact> --repo astral-sh/ruff
```

You can also download the attestation from [GitHub](https://github.com/astral-sh/ruff/attestations) and verify against that directly:
```sh
gh attestation verify <file-path of downloaded artifact> --bundle <file-path of downloaded attestation>
```