Avoid using typing-imported symbols for runtime edits

crates/ruff/resources/test/fixtures/pylint/sys_exit_alias_10.py

@@ -0,0 +1,8 @@
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from sys import exit as bar
+
+
+def main():
+    exit(0)

crates/ruff/resources/test/fixtures/pyupgrade/UP006_1.py

@@ -0,0 +1,10 @@
+from __future__ import annotations
+
+import typing
+
+if typing.TYPE_CHECKING:
+    from collections import defaultdict
+
+
+def f(x: typing.DefaultDict[str, str]) -> None:
+    ...

crates/ruff/resources/test/fixtures/pyupgrade/UP006_2.py

@@ -0,0 +1,8 @@
+import typing
+
+if typing.TYPE_CHECKING:
+    from collections import defaultdict
+
+
+def f(x: typing.DefaultDict[str, str]) -> None:
+    ...

crates/ruff/resources/test/fixtures/pyupgrade/UP006_3.py

@@ -0,0 +1,8 @@
+import typing
+
+if typing.TYPE_CHECKING:
+    from collections import defaultdict
+
+
+def f(x: "typing.DefaultDict[str, str]") -> None:
+    ...

crates/ruff/src/importer/mod.rs

@@ -70,11 +70,16 @@ impl<'a> Importer<'a> {
         at: TextSize,
         semantic_model: &SemanticModel,
     ) -> Result<(Edit, String)> {
-        self.get_symbol(module, member, at, semantic_model)?
-            .map_or_else(
-                || self.import_symbol(module, member, at, semantic_model),
-                Ok,
-            )
+        match self.get_symbol(module, member, at, semantic_model) {
+            None => self.import_symbol(module, member, at, semantic_model),
+            Some(Resolution::Success(edit, binding)) => Ok((edit, binding)),
+            Some(Resolution::LateBinding) => {
+                bail!("Unable to use existing symbol due to late binding")
+            }
+            Some(Resolution::IncompatibleContext) => {
+                bail!("Unable to use existing symbol due to incompatible context")
+            }
+        }
     }
 
     /// Return an [`Edit`] to reference an existing symbol, if it's present in the given [`SemanticModel`].
@@ -84,21 +89,25 @@ impl<'a> Importer<'a> {
         member: &str,
         at: TextSize,
         semantic_model: &SemanticModel,
-    ) -> Result<Option<(Edit, String)>> {
+    ) -> Option<Resolution> {
         // If the symbol is already available in the current scope, use it.
-        let Some((source, binding)) = semantic_model.resolve_qualified_import_name(module, member) else {
-            return Ok(None);
-        };
+        let imported_name = semantic_model.resolve_qualified_import_name(module, member)?;
 
-        // The exception: the symbol source (i.e., the import statement) comes after the current
-        // location. For example, we could be generating an edit within a function, and the import
+        // If the symbol source (i.e., the import statement) comes after the current location,
+        // abort. For example, we could be generating an edit within a function, and the import
         // could be defined in the module scope, but after the function definition. In this case,
         // it's unclear whether we can use the symbol (the function could be called between the
         // import and the current location, and thus the symbol would not be available). It's also
         // unclear whether should add an import statement at the top of the file, since it could
         // be shadowed between the import and the current location.
-        if source.start() > at {
-            bail!("Unable to use existing symbol `{binding}` due to late-import");
+        if imported_name.range().start() > at {
+            return Some(Resolution::LateBinding);
+        }
+
+        // If the symbol source (i.e., the import statement) is in a typing-only context, but we're
+        // in a runtime context, abort.
+        if imported_name.context().is_typing() && semantic_model.execution_context().is_runtime() {
+            return Some(Resolution::IncompatibleContext);
         }
 
         // We also add a no-op edit to force conflicts with any other fixes that might try to
@@ -118,10 +127,10 @@ impl<'a> Importer<'a> {
         // By adding this no-op edit, we force the `unused-imports` fix to conflict with the
         // `sys-exit-alias` fix, and thus will avoid applying both fixes in the same pass.
         let import_edit = Edit::range_replacement(
-            self.locator.slice(source.range()).to_string(),
-            source.range(),
+            self.locator.slice(imported_name.range()).to_string(),
+            imported_name.range(),
         );
-        Ok(Some((import_edit, binding)))
+        Some(Resolution::Success(import_edit, imported_name.into_name()))
     }
 
     /// Generate an [`Edit`] to reference the given symbol. Returns the [`Edit`] necessary to make
@@ -220,3 +229,13 @@ impl<'a> Importer<'a> {
         Ok(Edit::range_replacement(state.to_string(), stmt.range()))
     }
 }
+
+enum Resolution {
+    /// The symbol is available for use.
+    Success(Edit, String),
+    /// The symbol is imported, but the import came after the current location.
+    LateBinding,
+    /// The symbol is imported, but in an incompatible context (e.g., in typing-only context, while
+    /// we're in a runtime context).
+    IncompatibleContext,
+}

crates/ruff/src/rules/pylint/mod.rs

@@ -39,6 +39,7 @@ mod tests {
     #[test_case(Rule::SysExitAlias, Path::new("sys_exit_alias_7.py"); "PLR1722_7")]
     #[test_case(Rule::SysExitAlias, Path::new("sys_exit_alias_8.py"); "PLR1722_8")]
     #[test_case(Rule::SysExitAlias, Path::new("sys_exit_alias_9.py"); "PLR1722_9")]
+    #[test_case(Rule::SysExitAlias, Path::new("sys_exit_alias_10.py"); "PLR1722_10")]
     #[test_case(Rule::ContinueInFinally, Path::new("continue_in_finally.py"); "PLE0116")]
     #[test_case(Rule::GlobalStatement, Path::new("global_statement.py"); "PLW0603")]
     #[test_case(Rule::GlobalVariableNotAssigned, Path::new("global_variable_not_assigned.py"); "PLW0602")]

crates/ruff/src/rules/pylint/snapshots/ruff__rules__pylint__tests__PLR1722_sys_exit_alias_10.py.snap

@@ -0,0 +1,12 @@
+---
+source: crates/ruff/src/rules/pylint/mod.rs
+---
+sys_exit_alias_10.py:8:5: PLR1722 Use `sys.exit()` instead of `exit`
+  |
+8 | def main():
+9 |     exit(0)
+  |     ^^^^ PLR1722
+  |
+  = help: Replace `exit` with `sys.exit()`
+
+

crates/ruff/src/rules/pyupgrade/mod.rs

@@ -20,7 +20,10 @@ mod tests {
     #[test_case(Rule::TypeOfPrimitive, Path::new("UP003.py"); "UP003")]
     #[test_case(Rule::UselessObjectInheritance, Path::new("UP004.py"); "UP004")]
     #[test_case(Rule::DeprecatedUnittestAlias, Path::new("UP005.py"); "UP005")]
-    #[test_case(Rule::NonPEP585Annotation, Path::new("UP006.py"); "UP006")]
+    #[test_case(Rule::NonPEP585Annotation, Path::new("UP006_0.py"); "UP006_0")]
+    #[test_case(Rule::NonPEP585Annotation, Path::new("UP006_1.py"); "UP006_1")]
+    #[test_case(Rule::NonPEP585Annotation, Path::new("UP006_2.py"); "UP006_2")]
+    #[test_case(Rule::NonPEP585Annotation, Path::new("UP006_3.py"); "UP006_3")]
     #[test_case(Rule::NonPEP604Annotation, Path::new("UP007.py"); "UP007")]
     #[test_case(Rule::SuperCallWithParameters, Path::new("UP008.py"); "UP008")]
     #[test_case(Rule::UTF8EncodingDeclaration, Path::new("UP009_0.py"); "UP009_0")]

crates/ruff/src/rules/pyupgrade/snapshots/ruff__rules__pyupgrade__tests__UP006.py.snap → crates/ruff/src/rules/pyupgrade/snapshots/ruff__rules__pyupgrade__tests__UP006_0.py.snap

@@ -1,7 +1,7 @@
 ---
 source: crates/ruff/src/rules/pyupgrade/mod.rs
 ---
-UP006.py:4:10: UP006 [*] Use `list` instead of `typing.List` for type annotation
+UP006_0.py:4:10: UP006 [*] Use `list` instead of `typing.List` for type annotation
   |
 4 | def f(x: typing.List[str]) -> None:
   |          ^^^^^^^^^^^ UP006
@@ -19,7 +19,7 @@ UP006.py:4:10: UP006 [*] Use `list` instead of `typing.List` for type annotation
 6 6 | 
 7 7 | 
 
-UP006.py:11:10: UP006 [*] Use `list` instead of `List` for type annotation
+UP006_0.py:11:10: UP006 [*] Use `list` instead of `List` for type annotation
    |
 11 | def f(x: List[str]) -> None:
    |          ^^^^ UP006
@@ -37,7 +37,7 @@ UP006.py:11:10: UP006 [*] Use `list` instead of `List` for type annotation
 13 13 | 
 14 14 | 
 
-UP006.py:18:10: UP006 [*] Use `list` instead of `t.List` for type annotation
+UP006_0.py:18:10: UP006 [*] Use `list` instead of `t.List` for type annotation
    |
 18 | def f(x: t.List[str]) -> None:
    |          ^^^^^^ UP006
@@ -55,7 +55,7 @@ UP006.py:18:10: UP006 [*] Use `list` instead of `t.List` for type annotation
 20 20 | 
 21 21 | 
 
-UP006.py:25:10: UP006 [*] Use `list` instead of `IList` for type annotation
+UP006_0.py:25:10: UP006 [*] Use `list` instead of `IList` for type annotation
    |
 25 | def f(x: IList[str]) -> None:
    |          ^^^^^ UP006
@@ -73,7 +73,7 @@ UP006.py:25:10: UP006 [*] Use `list` instead of `IList` for type annotation
 27 27 | 
 28 28 | 
 
-UP006.py:29:11: UP006 [*] Use `list` instead of `List` for type annotation
+UP006_0.py:29:11: UP006 [*] Use `list` instead of `List` for type annotation
    |
 29 | def f(x: "List[str]") -> None:
    |           ^^^^ UP006
@@ -91,7 +91,7 @@ UP006.py:29:11: UP006 [*] Use `list` instead of `List` for type annotation
 31 31 | 
 32 32 | 
 
-UP006.py:33:12: UP006 [*] Use `list` instead of `List` for type annotation
+UP006_0.py:33:12: UP006 [*] Use `list` instead of `List` for type annotation
    |
 33 | def f(x: r"List[str]") -> None:
    |            ^^^^ UP006
@@ -109,7 +109,7 @@ UP006.py:33:12: UP006 [*] Use `list` instead of `List` for type annotation
 35 35 | 
 36 36 | 
 
-UP006.py:37:11: UP006 [*] Use `list` instead of `List` for type annotation
+UP006_0.py:37:11: UP006 [*] Use `list` instead of `List` for type annotation
    |
 37 | def f(x: "List[str]") -> None:
    |           ^^^^ UP006
@@ -127,7 +127,7 @@ UP006.py:37:11: UP006 [*] Use `list` instead of `List` for type annotation
 39 39 | 
 40 40 | 
 
-UP006.py:41:13: UP006 [*] Use `list` instead of `List` for type annotation
+UP006_0.py:41:13: UP006 [*] Use `list` instead of `List` for type annotation
    |
 41 | def f(x: """List[str]""") -> None:
    |             ^^^^ UP006
@@ -145,15 +145,15 @@ UP006.py:41:13: UP006 [*] Use `list` instead of `List` for type annotation
 43 43 | 
 44 44 | 
 
-UP006.py:45:10: UP006 Use `list` instead of `List` for type annotation
+UP006_0.py:45:10: UP006 Use `list` instead of `List` for type annotation
    |
 45 | def f(x: "Li" "st[str]") -> None:
    |          ^^^^^^^^^^^^^^ UP006
 46 |     ...
    |
    = help: Replace with `list`
 
-UP006.py:49:11: UP006 [*] Use `list` instead of `List` for type annotation
+UP006_0.py:49:11: UP006 [*] Use `list` instead of `List` for type annotation
    |
 49 | def f(x: "List['List[str]']") -> None:
    |           ^^^^ UP006
@@ -171,7 +171,7 @@ UP006.py:49:11: UP006 [*] Use `list` instead of `List` for type annotation
 51 51 | 
 52 52 | 
 
-UP006.py:49:17: UP006 [*] Use `list` instead of `List` for type annotation
+UP006_0.py:49:17: UP006 [*] Use `list` instead of `List` for type annotation
    |
 49 | def f(x: "List['List[str]']") -> None:
    |                 ^^^^ UP006
@@ -189,7 +189,7 @@ UP006.py:49:17: UP006 [*] Use `list` instead of `List` for type annotation
 51 51 | 
 52 52 | 
 
-UP006.py:53:11: UP006 [*] Use `list` instead of `List` for type annotation
+UP006_0.py:53:11: UP006 [*] Use `list` instead of `List` for type annotation
    |
 53 | def f(x: "List['Li' 'st[str]']") -> None:
    |           ^^^^ UP006
@@ -207,31 +207,31 @@ UP006.py:53:11: UP006 [*] Use `list` instead of `List` for type annotation
 55 55 | 
 56 56 | 
 
-UP006.py:53:16: UP006 Use `list` instead of `List` for type annotation
+UP006_0.py:53:16: UP006 Use `list` instead of `List` for type annotation
    |
 53 | def f(x: "List['Li' 'st[str]']") -> None:
    |                ^^^^^^^^^^^^^^ UP006
 54 |     ...
    |
    = help: Replace with `list`
 
-UP006.py:57:10: UP006 Use `list` instead of `List` for type annotation
+UP006_0.py:57:10: UP006 Use `list` instead of `List` for type annotation
    |
 57 | def f(x: "Li" "st['List[str]']") -> None:
    |          ^^^^^^^^^^^^^^^^^^^^^^ UP006
 58 |     ...
    |
    = help: Replace with `list`
 
-UP006.py:57:10: UP006 Use `list` instead of `List` for type annotation
+UP006_0.py:57:10: UP006 Use `list` instead of `List` for type annotation
    |
 57 | def f(x: "Li" "st['List[str]']") -> None:
    |          ^^^^^^^^^^^^^^^^^^^^^^ UP006
 58 |     ...
    |
    = help: Replace with `list`
 
-UP006.py:61:10: UP006 [*] Use `collections.deque` instead of `typing.Deque` for type annotation
+UP006_0.py:61:10: UP006 [*] Use `collections.deque` instead of `typing.Deque` for type annotation
    |
 61 | def f(x: typing.Deque[str]) -> None:
    |          ^^^^^^^^^^^^ UP006
@@ -257,7 +257,7 @@ UP006.py:61:10: UP006 [*] Use `collections.deque` instead of `typing.Deque` for
 63 64 | 
 64 65 | 
 
-UP006.py:65:10: UP006 [*] Use `collections.defaultdict` instead of `typing.DefaultDict` for type annotation
+UP006_0.py:65:10: UP006 [*] Use `collections.defaultdict` instead of `typing.DefaultDict` for type annotation
    |
 65 | def f(x: typing.DefaultDict[str, str]) -> None:
    |          ^^^^^^^^^^^^^^^^^^ UP006

crates/ruff/src/rules/pyupgrade/snapshots/ruff__rules__pyupgrade__tests__UP006_1.py.snap

@@ -0,0 +1,20 @@
+---
+source: crates/ruff/src/rules/pyupgrade/mod.rs
+---
+UP006_1.py:9:10: UP006 [*] Use `collections.defaultdict` instead of `typing.DefaultDict` for type annotation
+   |
+ 9 | def f(x: typing.DefaultDict[str, str]) -> None:
+   |          ^^^^^^^^^^^^^^^^^^ UP006
+10 |     ...
+   |
+   = help: Replace with `collections.defaultdict`
+
+ℹ Suggested fix
+6  6  |     from collections import defaultdict
+7  7  | 
+8  8  | 
+9     |-def f(x: typing.DefaultDict[str, str]) -> None:
+   9  |+def f(x: defaultdict[str, str]) -> None:
+10 10 |     ...
+
+

crates/ruff/src/rules/pyupgrade/snapshots/ruff__rules__pyupgrade__tests__UP006_2.py.snap

@@ -0,0 +1,12 @@
+---
+source: crates/ruff/src/rules/pyupgrade/mod.rs
+---
+UP006_2.py:7:10: UP006 Use `collections.defaultdict` instead of `typing.DefaultDict` for type annotation
+  |
+7 | def f(x: typing.DefaultDict[str, str]) -> None:
+  |          ^^^^^^^^^^^^^^^^^^ UP006
+8 |     ...
+  |
+  = help: Replace with `collections.defaultdict`
+
+

crates/ruff/src/rules/pyupgrade/snapshots/ruff__rules__pyupgrade__tests__UP006_3.py.snap

@@ -0,0 +1,20 @@
+---
+source: crates/ruff/src/rules/pyupgrade/mod.rs
+---
+UP006_3.py:7:11: UP006 [*] Use `collections.defaultdict` instead of `typing.DefaultDict` for type annotation
+  |
+7 | def f(x: "typing.DefaultDict[str, str]") -> None:
+  |           ^^^^^^^^^^^^^^^^^^ UP006
+8 |     ...
+  |
+  = help: Replace with `collections.defaultdict`
+
+ℹ Suggested fix
+4 4 |     from collections import defaultdict
+5 5 | 
+6 6 | 
+7   |-def f(x: "typing.DefaultDict[str, str]") -> None:
+  7 |+def f(x: "defaultdict[str, str]") -> None:
+8 8 |     ...
+
+