This release is a pre-release and may not be stable for production use.
A fast, extensible Python linter for custom rules.
Complements Ruff by letting you
write custom lint rules in Python — with Rust-powered analysis under the hood.
17x faster than Flake8 single-threaded. Custom lint rules in Python, with Rust-powered analysis.
Linting Django (901 files) -- 10 equivalent AST rules, single process
Getting started
# Lints the current workdir
$ uvx rude check
$ uv tool install rude
$ rude --version
rude 0.1a2
# Add rude to your project
uv add rude --dev
Write your first rule
from rude import Rule, Node, NodeType, Diagnostic
from collections.abc import Iterator
class NoDebugPrint(Rule):
code = "DBG001"
message = "Debug print() found"
node_types = {NodeType.CALL}
def check(self, node: Node) -> Iterator[Diagnostic]:
if node.function_name == "print":
yield self.diagnostic(node)
Two base classes: Rule (AST nodes) and LineRule (raw text). Rules can
provide autofixes with import management.
Register as a plugin or as local rules:
# pyproject.toml
[project.entry-points."rude.plugins"]
my_plugin = "my_plugin"
[tool.rude]
local-rules = ["tools/linting/rules.py"]
Key features
- Severity levels -- ERROR breaks CI, WARNING doesn't. Four levels (error, warning, info, hint) per rule, filterable with
--quiet. - Template rules -- lint without writing Python. Ban calls, require base classes, enforce decorators -- all from
pyproject.toml. - Autofix with imports --
Fix.replace(node, text, imports_from=[...])handles insertion, deduplication, and placement automatically. - Fast -- Rust-powered tree-sitter parsing and semantic analysis. Streaming pipeline keeps memory flat across a project (buffered when
--fixrewrites files); the GIL is released during per-file Rust analysis. - Rich Node API --
node.function_name,node.inherits_from("Base"),node.decorator_names. No raw tree-sitter needed. - 104 built-in rules -- pyflakes (F), pycodestyle (E/W), McCabe (C901). Additional rule sets can be added via third-party plugins or local Python rule files.
The sweet spot
| Standard rules | Custom rules | Speed | Memory | Severity | |
|---|---|---|---|---|---|
| Ruff | 800+ | none | fastest | low | all fatal |
| Rude | 104 + plugins | unlimited | fast | low | 4 levels |
| Flake8 | 100+ (plugins) | via packages | slow | medium | all fatal |
| Fixit | ~30 | via LibCST | slow | high | all fatal |
1 maintainer
Metadata
1 maintainer
Release files for rude 0.1a4
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| rude-0.1a4.tar.gz | 325.4 kB | Details |
Built distributions (wheels)
| File | Reset | |||
|---|---|---|---|---|
| rude-0.1a4-cp311-abi3-win_amd64.whl | CPython 3.11 | abi3 | Windows x86-64 | Details |
| rude-0.1a4-cp311-abi3-musllinux_1_2_x86_64.whl | CPython 3.11 | abi3 | Linux musl 1.2+ x86-64 | Details |
| rude-0.1a4-cp311-abi3-musllinux_1_2_aarch64.whl | CPython 3.11 | abi3 | Linux musl 1.2+ ARM64 | Details |
| rude-0.1a4-cp311-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl | CPython 3.11 | abi3 | Linux glibc 2.17+ x86-64 | Details |
| rude-0.1a4-cp311-abi3-manylinux_2_17_aarch64.manylinux2014_aarch64.whl | CPython 3.11 | abi3 | Linux glibc 2.17+ ARM64 | Details |
| rude-0.1a4-cp311-abi3-macosx_11_0_arm64.whl | CPython 3.11 | abi3 | macOS 11.0+ ARM64 | Details |
| rude-0.1a4-cp311-abi3-macosx_10_12_x86_64.whl | CPython 3.11 | abi3 | macOS 10.12+ x86-64 | Details |
Total release size: 4.9 MB
Release files / rude-0.1a4.tar.gz
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| Size | 325.4 kB |
| Tags | Source |
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