René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"We don't run `test_lazy_imports`","articleBody":"# Bug report\n\n### Bug description:\n\nThis is `Lib.test.test_import`:\n\n```\nLib/test/test_import\n├── __init__.py\n├── __main__.py\n├── data\n└── test_lazy_imports.py\n```\n\nOur test finder doesn't see `test_lazy_imports`: https://github.com/python/cpython/pull/144852#issuecomment-3974999139.\n\n`python -m test` does not run `test_lazy_imports` at all.\n\nWe could try to keep regular import test package with lazy import test package by:\n1) Updating [`Lib.test.libregrtest.findtests.SPLITTESTDIRS`](https://github.com/python/cpython/blob/d2f709de1e827c1865532f9fe2dd33fde88057d8/Lib/test/libregrtest/findtests.py#L14-L34) to include `test_import`.\n2) Moving `Lib/test/test_import/__init__.py` to `Lib/test/test_import/test_import.py` .\n3) Creating a new `Lib/test/test_import/__init__.py` that defines `load_tests` hook that calls `load_package_tests`.\n\nIt is visible by now that this is a can of worms. `Lib.test.test_import` uses relative imports itself, so moving `Lib.test.test_import` to `Lib.test.test_import.test_import` breaks them. This means we'd need to massage `Lib.test.test_import.test_import` to work again, which means we'd need to modify old tests -- which I think on its own disqualifies this approach.\n\nWe can't have `Lib.test.test_import` and `Lib.test.test_import.test_lazy_imports` at the same time set up in a maintainable way, because it would involve having manual registration of test suites in `test_import` (or maybe in `test_lazy_imports`?). Perhaps we can do this cheaply, but I assume this makes these tests less self-contained and complicates the setup.\n\nI propose we move `Lib/test/test_import/test_lazy_imports.py` (+data) into `Lib/test/test_lazy_import/__init__.py` (+data). Unless there is any other cost-effective solution to this that I've missed?\n\nCC @pablogsal @DinoV @brittanyrey @Yhg1s @vstinner @sobolevn \n\n### CPython versions tested on:\n\nCPython main branch\n\n### Operating systems tested on:\n\n_No response_\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-145336\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/johnslavik","@type":"Person","name":"johnslavik"},"datePublished":"2026-02-27T23:17:08.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/145334/cpython/issues/145334"}