[ty] Recognize submodules in self-referential imports #18005
Merged
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Contributor
|
This was referenced May 10, 2025
sharkdp
commented
May 11, 2025
|
|
||
| #### Issue 113 | ||
|
|
||
| See: <https://github.com/astral-sh/ty/issues/113> |
Contributor
Author
There was a problem hiding this comment.
I added a test for astral-sh/ty#113 here as well. The issue is not fixed with this PR (I didn't have a closer look into why), but we now infer .Unknown instead of Never
sharkdp
commented
May 11, 2025
carljm
approved these changes
May 13, 2025
Contributor
carljm
left a comment
carljm
left a comment
There was a problem hiding this comment.
Looks great to me, thank you!!
carljm
reviewed
May 13, 2025
AlexWaygood
reviewed
May 13, 2025
dcreager
added a commit
that referenced
this pull request
May 13, 2025
…eep-dish * origin/main: [ty] __file__ is always a string inside a Python module (#18071) [ty] Recognize submodules in self-referential imports (#18005) [ty] Add a note to the diagnostic if a new builtin is used on an old Python version (#18068) [ty] Add tests for `else` branches of `hasattr()` narrowing (#18067) [ty] Improve diagnostics for `assert_type` and `assert_never` (#18050) [ty] contribution guide (#18061) [ty] Implement `DataClassInstance` protocol for dataclasses. (#18018) [ruff_python_ast] Fix redundant visitation of test expressions in elif clause statements (#18064)
Glyphack
pushed a commit
to Glyphack/ruff
that referenced
this pull request
May 21, 2025
## Summary Fix the lookup of `submodule`s in cases where the `parent` module has a self-referential import like `from parent import submodule`. This allows us to infer proper types for many symbols where we previously inferred `Never`. This leads to many new false (and true) positives across the ecosystem because the fact that we previously inferred `Never` shadowed a lot of problems. For example, we inferred `Never` for `os.path`, which is why we now see a lot of new diagnostics related to `os.path.abspath` and similar. ```py import os reveal_type(os.path) # previously: Never, now: <module 'os.path'> ``` closes astral-sh/ty#261 closes astral-sh/ty#307 ## Ecosystem analysis ``` ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━┳━━━━━━━━━┳━━━━━━━┳━━━━━━━━━━━━┓ ┃ Diagnostic ID ┃ Severity ┃ Removed ┃ Added ┃ Net Change ┃ ┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━╇━━━━━━━━━╇━━━━━━━╇━━━━━━━━━━━━┩ │ call-non-callable │ error │ 1 │ 5 │ +4 │ │ call-possibly-unbound-method │ warning │ 6 │ 26 │ +20 │ │ invalid-argument-type │ error │ 26 │ 94 │ +68 │ │ invalid-assignment │ error │ 18 │ 46 │ +28 │ │ invalid-context-manager │ error │ 9 │ 4 │ -5 │ │ invalid-raise │ error │ 1 │ 1 │ 0 │ │ invalid-return-type │ error │ 3 │ 20 │ +17 │ │ invalid-super-argument │ error │ 4 │ 0 │ -4 │ │ invalid-type-form │ error │ 573 │ 0 │ -573 │ │ missing-argument │ error │ 2 │ 10 │ +8 │ │ no-matching-overload │ error │ 0 │ 715 │ +715 │ │ non-subscriptable │ error │ 0 │ 35 │ +35 │ │ not-iterable │ error │ 6 │ 7 │ +1 │ │ possibly-unbound-attribute │ warning │ 14 │ 31 │ +17 │ │ possibly-unbound-import │ warning │ 13 │ 0 │ -13 │ │ possibly-unresolved-reference │ warning │ 0 │ 8 │ +8 │ │ redundant-cast │ warning │ 1 │ 0 │ -1 │ │ too-many-positional-arguments │ error │ 2 │ 0 │ -2 │ │ unknown-argument │ error │ 2 │ 0 │ -2 │ │ unresolved-attribute │ error │ 583 │ 304 │ -279 │ │ unresolved-import │ error │ 0 │ 96 │ +96 │ │ unsupported-operator │ error │ 0 │ 17 │ +17 │ │ unused-ignore-comment │ warning │ 29 │ 2 │ -27 │ ├───────────────────────────────┼──────────┼─────────┼───────┼────────────┤ │ TOTAL │ │ 1293 │ 1421 │ +128 │ └───────────────────────────────┴──────────┴─────────┴───────┴────────────┘ Analysis complete. Found 23 unique diagnostic IDs. Total diagnostics removed: 1293 Total diagnostics added: 1421 Net change: +128 ``` * We see a lot of new errors (`no-matching-overload`) related to `os.path.dirname` and other `os.path` operations because we infer `str | None` for `__file__`, but many projects use something like `os.path.dirname(__file__)`. * We also see many new `unresolved-attribute` errors related to the fact that we now infer proper module types for some imports (e.g. `import kornia.augmentation as K`), but we don't allow implicit imports (e.g. accessing `K.auto.operations` without also importing `K.auto`). See astral-sh/ty#133. * Many false positive `invalid-type-form` are removed because we now infer the correct type for some type expression instead of `Never`, which is not valid in a type annotation/expression context. ## Test Plan Added new Markdown tests
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Summary
Fix the lookup of
submodules in cases where theparentmodule has a self-referential import likefrom parent import submodule. This allows us to infer proper types for many symbols where we previously inferredNever. This leads to many new false (and true) positives across the ecosystem because the fact that we previously inferredNevershadowed a lot of problems. For example, we inferredNeverforos.path, which is why we now see a lot of new diagnostics related toos.path.abspathand similar.closes astral-sh/ty#261
closes astral-sh/ty#307
Ecosystem analysis
no-matching-overload) related toos.path.dirnameand otheros.pathoperations because we inferstr | Nonefor__file__, but many projects use something likeos.path.dirname(__file__).unresolved-attributeerrors related to the fact that we now infer proper module types for some imports (e.g.import kornia.augmentation as K), but we don't allow implicit imports (e.g. accessingK.auto.operationswithout also importingK.auto). See Model implicit imports of submodules, if it occurs in a parent module __init__.py ty#133.invalid-type-formare removed because we now infer the correct type for some type expression instead ofNever, which is not valid in a type annotation/expression context.Test Plan
Added new Markdown tests