René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"dir(module) ignores module-level __dir__ (PEP 562)","articleBody":"# Summary\n\nA module-level `__dir__` function (PEP 562) is ignored: `dir(module)` returns the raw `__dict__` keys instead of calling the module's `__dir__`.\n\n```python\n# mod.py\nimport sys\n\ndef __dir__():\n    return ['gamma', 'alpha', 'beta']\n\nprint(dir(sys.modules[__name__]))\n```\n\n- CPython 3.14.2: `['alpha', 'beta', 'gamma']` (calls the function, `dir()` sorts the result)\n- RustPython: `['__builtins__', '__cached__', '__dir__', ..., 'sys']`\n\nVerified on `main` @ 7044fdcc8. PEP 562's other half, module-level `__getattr__`, works — only `__dir__` is missing.\n\n# Cause\n\n`PyModule.__dir__` (`crates/vm/src/builtins/module.rs:300`) unconditionally returns the module dict's keys:\n\n```rust\nfn __dir__(zelf: \u0026Py\u003cSelf\u003e, vm: \u0026VirtualMachine) -\u003e PyResult\u003cVec\u003cPyObjectRef\u003e\u003e {\n    let dict_attr = zelf.as_object().get_attr(identifier!(vm, __dict__), vm)?;\n    ...\n    Ok(dict.into_iter().map(|(k, _v)| k).collect())\n}\n```\n\nCPython's `module___dir___impl` (Objects/moduleobject.c) first looks up `__dir__` in the module's `__dict__` and, if present, calls it and returns its result; only otherwise does it fall back to `list(__dict__)`.\n\n---\n*Found while running synthetic benchmark/compat suites; researched and reported by Claude on behalf of @youknowone.*\n","author":{"url":"https://github.com/youknowone","@type":"Person","name":"youknowone"},"datePublished":"2026-07-06T15:34:36.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/8231/RustPython/issues/8231"}