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[ty] Document nearly all lints (#17981)
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3 changed files with 558 additions and 116 deletions
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@ -61,7 +61,23 @@ Calling a non-callable object will raise a `TypeError` at runtime.
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<summary>detects when an argument is used as both a value and a type form in a call</summary>
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### What it does
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Checks whether an argument is used as both a value and a type form in a call
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Checks whether an argument is used as both a value and a type form in a call.
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### Why is this bad?
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Such calls have confusing semantics and often indicate a logic error.
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### Examples
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```python
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from typing import reveal_type
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from ty_extensions import is_fully_static
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if flag:
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f = repr # Expects a value
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else:
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f = is_fully_static # Expects a type form
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f(int) # error
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```
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### Links
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* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20conflicting-argument-forms)
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@ -83,9 +99,19 @@ A variable with two conflicting declarations likely indicates a mistake.
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Moreover, it could lead to incorrect or ill-defined type inference for
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other code that relies on these variables.
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### Examples
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```python
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if b:
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a: int
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else:
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a: str
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a = 1
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```
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### Links
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* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20conflicting-declarations)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L125)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L141)
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</details>
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## `conflicting-metaclass`
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@ -95,11 +121,28 @@ other code that relies on these variables.
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<details>
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<summary>detects conflicting metaclasses</summary>
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TODO #14889
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### What it does
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Checks for class definitions where the metaclass of the class
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being created would not be a subclass of the metaclasses of
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all the class's bases.
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### Why is it bad?
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Such a class definition raises a `TypeError` at runtime.
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### Examples
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```python
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class M1(type): ...
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class M2(type): ...
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class A(metaclass=M1): ...
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class B(metaclass=M2): ...
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## TypeError: metaclass conflict
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class C(A, B): ...
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```
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### Links
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* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20conflicting-metaclass)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L140)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L166)
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</details>
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## `cyclic-class-definition`
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@ -110,14 +153,27 @@ TODO #14889
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<summary>detects cyclic class definitions</summary>
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### What it does
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Checks for class definitions with a cyclic inheritance chain.
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Checks for class definitions in stub files that inherit
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(directly or indirectly) from themselves.
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### Why is it bad?
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TODO #14889
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Although forward references are natively supported in stub files,
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inheritance cycles are still disallowed, as it is impossible to
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resolve a consistent [method resolution order] for a class that
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inherits from itself.
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### Examples
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```python
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## foo.pyi
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class A(B): ...
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class B(A): ...
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```
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[method resolution order]: https://docs.python.org/3/glossary.html#term-method-resolution-order
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### Links
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* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20cyclic-class-definition)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L149)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L192)
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</details>
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## `division-by-zero`
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@ -140,7 +196,7 @@ Dividing by zero raises a `ZeroDivisionError` at runtime.
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### Links
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* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20division-by-zero)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L162)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L218)
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</details>
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## `duplicate-base`
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@ -154,11 +210,19 @@ Dividing by zero raises a `ZeroDivisionError` at runtime.
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Checks for class definitions with duplicate bases.
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### Why is this bad?
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Class definitions with duplicate bases raise a `TypeError` at runtime.
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Class definitions with duplicate bases raise `TypeError` at runtime.
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### Examples
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```python
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class A: ...
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## TypeError: duplicate base class
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class B(A, A): ...
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```
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### Links
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* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20duplicate-base)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L180)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L236)
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</details>
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## `escape-character-in-forward-annotation`
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@ -295,7 +359,7 @@ TypeError: multiple bases have instance lay-out conflict
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### Links
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* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20incompatible-slots)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L193)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L257)
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</details>
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## `inconsistent-mro`
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@ -306,14 +370,25 @@ TypeError: multiple bases have instance lay-out conflict
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<summary>detects class definitions with an inconsistent MRO</summary>
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### What it does
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Checks for classes with an inconsistent method resolution order (MRO).
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Checks for classes with an inconsistent [method resolution order] (MRO).
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### Why is this bad?
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Classes with an inconsistent MRO will raise a `TypeError` at runtime.
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### Examples
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```python
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class A: ...
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class B(A): ...
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## TypeError: Cannot create a consistent method resolution order
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class C(A, B): ...
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```
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[method resolution order]: https://docs.python.org/3/glossary.html#term-method-resolution-order
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### Links
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* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20inconsistent-mro)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L279)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L343)
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</details>
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## `index-out-of-bounds`
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@ -330,9 +405,15 @@ a container.
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### Why is this bad?
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Using an out of bounds index will raise an `IndexError` at runtime.
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### Examples
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```python
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t = (0, 1, 2)
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t[3] # IndexError: tuple index out of range
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```
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### Links
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* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20index-out-of-bounds)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L292)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L367)
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</details>
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## `invalid-argument-type`
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@ -358,7 +439,7 @@ func("foo") # error: [invalid-argument-type]
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### Links
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* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-argument-type)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L306)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L387)
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</details>
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## `invalid-assignment`
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@ -368,11 +449,24 @@ func("foo") # error: [invalid-argument-type]
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<details>
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<summary>detects invalid assignments</summary>
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TODO #14889
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### What it does
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Checks for assignments where the type of the value
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is not [assignable to] the type of the assignee.
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### Why is this bad?
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Such assignments break the rules of the type system and
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weaken a type checker's ability to accurately reason about your code.
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### Examples
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```python
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a: int = ''
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```
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[assignable to]: https://typing.python.org/en/latest/spec/glossary.html#term-assignable
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### Links
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* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-assignment)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L346)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L427)
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</details>
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## `invalid-attribute-access`
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@ -383,20 +477,29 @@ TODO #14889
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<summary>Invalid attribute access</summary>
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### What it does
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Makes sure that instance attribute accesses are valid.
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Checks for assignments to class variables from instances
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and assignments to instance variables from its class.
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### Why is this bad?
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Incorrect assignments break the rules of the type system and
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weaken a type checker's ability to accurately reason about your code.
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### Examples
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```python
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class C:
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var: ClassVar[int] = 1
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class_var: ClassVar[int] = 1
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instance_var: int
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C.var = 3 # okay
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C().var = 3 # error: Cannot assign to class variable
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C.class_var = 3 # okay
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C().class_var = 3 # error: Cannot assign to class variable
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C().instance_var = 3 # okay
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C.instance_var = 3 # error: Cannot assign to instance variable
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```
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### Links
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* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-attribute-access)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1099)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1311)
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</details>
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## `invalid-base`
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@ -404,13 +507,13 @@ C().var = 3 # error: Cannot assign to class variable
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**Default level**: error
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<details>
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<summary>detects class definitions with an invalid base</summary>
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<summary>detects invalid bases in class definitions</summary>
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TODO #14889
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### Links
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* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-base)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L355)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L449)
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</details>
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## `invalid-context-manager`
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@ -420,11 +523,23 @@ TODO #14889
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<details>
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<summary>detects expressions used in with statements that don't implement the context manager protocol</summary>
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TODO #14889
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### What it does
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Checks for expressions used in `with` statements
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that do not implement the context manager protocol.
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### Why is this bad?
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Such a statement will raise `TypeError` at runtime.
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### Examples
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```python
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## TypeError: 'int' object does not support the context manager protocol
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with 1:
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print(2)
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```
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### Links
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* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-context-manager)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L364)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L458)
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</details>
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## `invalid-declaration`
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@ -434,11 +549,25 @@ TODO #14889
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<details>
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<summary>detects invalid declarations</summary>
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TODO #14889
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### What it does
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Checks for declarations where the inferred type of an existing symbol
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is not [assignable to] its post-hoc declared type.
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### Why is this bad?
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Such declarations break the rules of the type system and
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weaken a type checker's ability to accurately reason about your code.
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### Examples
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```python
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a = 1
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a: str
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```
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[assignable to]: https://typing.python.org/en/latest/spec/glossary.html#term-assignable
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### Links
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* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-declaration)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L373)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L479)
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</details>
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## `invalid-exception-caught`
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@ -479,7 +608,7 @@ except ZeroDivisionError:
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### Links
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* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-exception-caught)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L382)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L502)
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</details>
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## `invalid-generic-class`
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@ -510,7 +639,7 @@ class C[U](Generic[T]): ...
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### Links
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* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-generic-class)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L418)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L538)
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</details>
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## `invalid-legacy-type-variable`
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@ -543,7 +672,7 @@ def f(t: TypeVar("U")): ...
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### Links
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* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-legacy-type-variable)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L444)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L564)
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</details>
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## `invalid-metaclass`
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@ -575,7 +704,7 @@ class B(metaclass=f): ...
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### Links
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* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-metaclass)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L472)
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* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L592)
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</details>
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## `invalid-overload`
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@ -623,7 +752,7 @@ def foo(x: int) -> int: ...
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### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-overload)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L499)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L619)
|
||||
</details>
|
||||
|
||||
## `invalid-parameter-default`
|
||||
|
|
@ -634,14 +763,21 @@ def foo(x: int) -> int: ...
|
|||
<summary>detects default values that can't be assigned to the parameter's annotated type</summary>
|
||||
|
||||
### What it does
|
||||
Checks for default values that can't be assigned to the parameter's annotated type.
|
||||
Checks for default values that can't be
|
||||
assigned to the parameter's annotated type.
|
||||
|
||||
### Why is this bad?
|
||||
TODO #14889
|
||||
This breaks the rules of the type system and
|
||||
weakens a type checker's ability to accurately reason about your code.
|
||||
|
||||
### Examples
|
||||
```python
|
||||
def f(a: int = ''): ...
|
||||
```
|
||||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-parameter-default)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L542)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L662)
|
||||
</details>
|
||||
|
||||
## `invalid-protocol`
|
||||
|
|
@ -674,7 +810,7 @@ TypeError: Protocols can only inherit from other protocols, got <class 'int'>
|
|||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-protocol)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L251)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L315)
|
||||
</details>
|
||||
|
||||
## `invalid-raise`
|
||||
|
|
@ -722,7 +858,7 @@ def g():
|
|||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-raise)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L555)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L682)
|
||||
</details>
|
||||
|
||||
## `invalid-return-type`
|
||||
|
|
@ -746,7 +882,7 @@ def func() -> int:
|
|||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-return-type)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L327)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L408)
|
||||
</details>
|
||||
|
||||
## `invalid-super-argument`
|
||||
|
|
@ -790,7 +926,7 @@ super(B, A) # error: `A` does not satisfy `issubclass(A, B)`
|
|||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-super-argument)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L598)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L725)
|
||||
</details>
|
||||
|
||||
## `invalid-syntax-in-forward-annotation`
|
||||
|
|
@ -825,9 +961,15 @@ code seen only by the type checker, and not at runtime. Normally this flag is im
|
|||
must be assigned the value `False` at runtime; the type checker will consider its value to
|
||||
be `True`. If annotated, it must be annotated as a type that can accept `bool` values.
|
||||
|
||||
### Examples
|
||||
```python
|
||||
TYPE_CHECKING: str
|
||||
TYPE_CHECKING = ''
|
||||
```
|
||||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-type-checking-constant)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L637)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L764)
|
||||
</details>
|
||||
|
||||
## `invalid-type-form`
|
||||
|
|
@ -838,14 +980,24 @@ be `True`. If annotated, it must be annotated as a type that can accept `bool` v
|
|||
<summary>detects invalid type forms</summary>
|
||||
|
||||
### What it does
|
||||
Checks for invalid type expressions.
|
||||
Checks for expressions that are used as type expressions
|
||||
but cannot validly be interpreted as such.
|
||||
|
||||
### Why is this bad?
|
||||
TODO #14889
|
||||
Such expressions cannot be understood by ty.
|
||||
In some cases, they might raise errors at runtime.
|
||||
|
||||
### Examples
|
||||
```python
|
||||
from typing import Annotated
|
||||
|
||||
a: type[1] # `1` is not a type
|
||||
b: Annotated[int] # `Annotated` expects at least two arguments
|
||||
```
|
||||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-type-form)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L655)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L788)
|
||||
</details>
|
||||
|
||||
## `invalid-type-variable-constraints`
|
||||
|
|
@ -855,11 +1007,31 @@ TODO #14889
|
|||
<details>
|
||||
<summary>detects invalid type variable constraints</summary>
|
||||
|
||||
TODO #14889
|
||||
### What it does
|
||||
Checks for constrained [type variables] with only one constraint.
|
||||
|
||||
### Why is this bad?
|
||||
A constrained type variable must have at least two constraints.
|
||||
|
||||
### Examples
|
||||
```python
|
||||
from typing import TypeVar
|
||||
|
||||
T = TypeVar('T', str) # invalid constrained TypeVar
|
||||
```
|
||||
|
||||
Use instead:
|
||||
```python
|
||||
T = TypeVar('T', str, int) # valid constrained TypeVar
|
||||
## or
|
||||
T = TypeVar('T', bound=str) # valid bound TypeVar
|
||||
```
|
||||
|
||||
[type variables]: https://docs.python.org/3/library/typing.html#typing.TypeVar
|
||||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-type-variable-constraints)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L668)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L811)
|
||||
</details>
|
||||
|
||||
## `missing-argument`
|
||||
|
|
@ -883,7 +1055,7 @@ func() # TypeError: func() missing 1 required positional argument: 'x'
|
|||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20missing-argument)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L677)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L840)
|
||||
</details>
|
||||
|
||||
## `no-matching-overload`
|
||||
|
|
@ -911,7 +1083,7 @@ func("string") # error: [no-matching-overload]
|
|||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20no-matching-overload)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L696)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L859)
|
||||
</details>
|
||||
|
||||
## `non-subscriptable`
|
||||
|
|
@ -934,7 +1106,7 @@ Subscripting an object that does not support it will raise a `TypeError` at runt
|
|||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20non-subscriptable)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L719)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L882)
|
||||
</details>
|
||||
|
||||
## `not-iterable`
|
||||
|
|
@ -959,7 +1131,7 @@ for i in 34: # TypeError: 'int' object is not iterable
|
|||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20not-iterable)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L737)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L900)
|
||||
</details>
|
||||
|
||||
## `parameter-already-assigned`
|
||||
|
|
@ -985,7 +1157,7 @@ f(1, x=2) # Error raised here
|
|||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20parameter-already-assigned)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L788)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L951)
|
||||
</details>
|
||||
|
||||
## `raw-string-type-annotation`
|
||||
|
|
@ -1028,6 +1200,11 @@ def test(): -> "int":
|
|||
### What it does
|
||||
Makes sure that the argument of `static_assert` is statically known to be true.
|
||||
|
||||
### Why is this bad?
|
||||
A `static_assert` call represents an explicit request from the user
|
||||
for the type checker to emit an error if the argument cannot be verified
|
||||
to evaluate to `True` in a boolean context.
|
||||
|
||||
### Examples
|
||||
```python
|
||||
from ty_extensions import static_assert
|
||||
|
|
@ -1039,7 +1216,7 @@ static_assert(int(2.0 * 3.0) == 6) # error: does not have a statically known tr
|
|||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20static-assert-error)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1080)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1287)
|
||||
</details>
|
||||
|
||||
## `subclass-of-final-class`
|
||||
|
|
@ -1067,7 +1244,7 @@ class B(A): ... # Error raised here
|
|||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20subclass-of-final-class)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L858)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1042)
|
||||
</details>
|
||||
|
||||
## `too-many-positional-arguments`
|
||||
|
|
@ -1093,7 +1270,7 @@ f("foo") # Error raised here
|
|||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20too-many-positional-arguments)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L903)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1087)
|
||||
</details>
|
||||
|
||||
## `type-assertion-failure`
|
||||
|
|
@ -1120,7 +1297,7 @@ def _(x: int):
|
|||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20type-assertion-failure)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L881)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1065)
|
||||
</details>
|
||||
|
||||
## `unavailable-implicit-super-arguments`
|
||||
|
|
@ -1164,7 +1341,7 @@ class A:
|
|||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unavailable-implicit-super-arguments)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L924)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1108)
|
||||
</details>
|
||||
|
||||
## `unknown-argument`
|
||||
|
|
@ -1190,7 +1367,7 @@ f(x=1, y=2) # Error raised here
|
|||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unknown-argument)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L979)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1165)
|
||||
</details>
|
||||
|
||||
## `unresolved-attribute`
|
||||
|
|
@ -1204,11 +1381,20 @@ f(x=1, y=2) # Error raised here
|
|||
Checks for unresolved attributes.
|
||||
|
||||
### Why is this bad?
|
||||
Accessing an unbound attribute will raise an `AttributeError` at runtime. An unresolved attribute is not guaranteed to exist from the type alone, so this could also indicate that the object is not of the type that the user expects.
|
||||
Accessing an unbound attribute will raise an `AttributeError` at runtime.
|
||||
An unresolved attribute is not guaranteed to exist from the type alone,
|
||||
so this could also indicate that the object is not of the type that the user expects.
|
||||
|
||||
### Examples
|
||||
```python
|
||||
class A: ...
|
||||
|
||||
A().foo # AttributeError: 'A' object has no attribute 'foo'
|
||||
```
|
||||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unresolved-attribute)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1000)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1186)
|
||||
</details>
|
||||
|
||||
## `unresolved-import`
|
||||
|
|
@ -1222,12 +1408,17 @@ Accessing an unbound attribute will raise an `AttributeError` at runtime. An unr
|
|||
Checks for import statements for which the module cannot be resolved.
|
||||
|
||||
### Why is this bad?
|
||||
Importing a module that cannot be resolved will raise an `ImportError`
|
||||
Importing a module that cannot be resolved will raise a `ModuleNotFoundError`
|
||||
at runtime.
|
||||
|
||||
### Examples
|
||||
```python
|
||||
import foo # ModuleNotFoundError: No module named 'foo'
|
||||
```
|
||||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unresolved-import)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1013)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1208)
|
||||
</details>
|
||||
|
||||
## `unresolved-reference`
|
||||
|
|
@ -1251,7 +1442,7 @@ print(x) # NameError: name 'x' is not defined
|
|||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unresolved-reference)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1027)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1227)
|
||||
</details>
|
||||
|
||||
## `unsupported-bool-conversion`
|
||||
|
|
@ -1287,7 +1478,7 @@ b1 < b2 < b1 # exception raised here
|
|||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unsupported-bool-conversion)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L757)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L920)
|
||||
</details>
|
||||
|
||||
## `unsupported-operator`
|
||||
|
|
@ -1305,9 +1496,16 @@ the operands don't support the operator.
|
|||
Attempting to use an unsupported operator will raise a `TypeError` at
|
||||
runtime.
|
||||
|
||||
### Examples
|
||||
```python
|
||||
class A: ...
|
||||
|
||||
A() + A() # TypeError: unsupported operand type(s) for +: 'A' and 'A'
|
||||
```
|
||||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unsupported-operator)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1046)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1246)
|
||||
</details>
|
||||
|
||||
## `zero-stepsize-in-slice`
|
||||
|
|
@ -1331,7 +1529,7 @@ l[1:10:0] # ValueError: slice step cannot be zero
|
|||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20zero-stepsize-in-slice)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1061)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1268)
|
||||
</details>
|
||||
|
||||
## `call-possibly-unbound-method`
|
||||
|
|
@ -1394,9 +1592,18 @@ Checks for possibly unbound attributes.
|
|||
### Why is this bad?
|
||||
Attempting to access an unbound attribute will raise an `AttributeError` at runtime.
|
||||
|
||||
### Examples
|
||||
```python
|
||||
class A:
|
||||
if b:
|
||||
c = 0
|
||||
|
||||
A.c # AttributeError: type object 'A' has no attribute 'c'
|
||||
```
|
||||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20possibly-unbound-attribute)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L809)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L972)
|
||||
</details>
|
||||
|
||||
## `possibly-unbound-import`
|
||||
|
|
@ -1413,9 +1620,21 @@ Checks for imports of symbols that may be unbound.
|
|||
Importing an unbound module or name will raise a `ModuleNotFoundError`
|
||||
or `ImportError` at runtime.
|
||||
|
||||
### Examples
|
||||
```python
|
||||
## module.py
|
||||
import datetime
|
||||
|
||||
if datetime.date.today().weekday() != 6:
|
||||
a = 1
|
||||
|
||||
## main.py
|
||||
from module import a # ImportError: cannot import name 'a' from 'module'
|
||||
```
|
||||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20possibly-unbound-import)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L822)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L994)
|
||||
</details>
|
||||
|
||||
## `redundant-cast`
|
||||
|
|
@ -1441,7 +1660,7 @@ cast(int, f()) # Redundant
|
|||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20redundant-cast)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1118)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1339)
|
||||
</details>
|
||||
|
||||
## `undefined-reveal`
|
||||
|
|
@ -1458,11 +1677,13 @@ Checks for calls to `reveal_type` without importing it.
|
|||
Using `reveal_type` without importing it will raise a `NameError` at runtime.
|
||||
|
||||
### Examples
|
||||
TODO #14889
|
||||
```python
|
||||
reveal_type(1) # NameError: name 'reveal_type' is not defined
|
||||
```
|
||||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20undefined-reveal)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L963)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1147)
|
||||
</details>
|
||||
|
||||
## `unknown-rule`
|
||||
|
|
@ -1519,7 +1740,7 @@ print(x) # NameError: name 'x' is not defined
|
|||
|
||||
### Links
|
||||
* [Related issues](https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20possibly-unresolved-reference)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L836)
|
||||
* [View source](https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1020)
|
||||
</details>
|
||||
|
||||
## `unused-ignore-comment`
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue