astral-sh/ruff

`PTH*`: Incorrect suggestion to use `Pathlib` when using file descriptors

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#17,699 创建于 2025年4月29日

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bugfixeshelp wantedrule

描述

Multiple pathlib rules recommend the use of pathlib.Path over their os equivalent even when they're used with a bytes string or directory descriptor which aren't supported by pathlib.

One such example is

import os
os.listdir(1)

$ ruff --version
ruff 0.11.7
$ ruff check --isolated --select PTH208 t.py
t.py:2:1: PTH208 Use `pathlib.Path.iterdir()` instead.
  |
1 | import os
2 | os.listdir(1)
  | ^^^^^^^^^^ PTH208
  |

Found 1 error.

Past instances of the same or similar error:

贡献者指南

技术栈
pythonrust
领域
toolingdeveloper experience
议题类型
bug
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-3 hours
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
active
清晰度议题是否清楚说明期望改动、验收标准和下一步。
clear
前置要求
Pythonpathlibruff rulesfile descriptors
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
65
研究方向
Investigate the implementation of PTH208 in the ruff codebase, likely in `crates/ruff linter/src/rules/pathlib/`. Check how the rule currently determines when to suggest `pathlib.Path.iterdir()`. The issue indicates that the rule should skip cases where the argument is a bytes string or a file descriptor (integer). Review past issues #7620 and #12871 for prior discussion and potential solutions. Implement a condition to suppress the rule when the argument is not a string path.