Merge 19a34591ac into b0bc990cbf

crates/ruff_linter/resources/test/fixtures/pandas_vet/PD011.py

@@ -0,0 +1,38 @@
+import pandas as pd
+import numpy as np
+
+
+def test_numpy_unique_inverse():
+    unique = np.unique_inverse([1, 2, 3, 2, 1])
+    result = unique.values
+
+
+def test_numpy_unique_all():
+    unique = np.unique_all([1, 2, 3, 2, 1])
+    result = unique.values
+
+
+def test_numpy_unique_counts():
+    unique = np.unique_counts([1, 2, 3, 2, 1])
+    result = unique.values
+
+
+def test_numpy_typed_unique_inverse():
+    from typing import TYPE_CHECKING
+    if TYPE_CHECKING:
+        from numpy.lib._arraysetops_impl import UniqueInverseResult
+    unique: UniqueInverseResult[np.uint64] = np.unique_inverse([1, 2, 3, 2, 1])
+    result = unique.values
+
+
+def test_simple_non_pandas():
+    p = 1
+    result = p.values
+
+
+def test_pandas_dataframe_values():
+    """This should trigger PD011 - pandas DataFrame .values usage"""
+    import pandas as pd
+    x = pd.DataFrame()
+    result = x.values
+

crates/ruff_linter/src/rules/pandas_vet/helpers.rs

@@ -1,5 +1,7 @@
 use ruff_python_ast::Expr;
-use ruff_python_semantic::{BindingKind, Imported, SemanticModel};
+use ruff_python_semantic::{
+    BindingKind, Imported, SemanticModel, analyze::typing::find_binding_value,
+};
 
 #[derive(Debug)]
 pub(super) enum Resolution {
@@ -16,6 +18,7 @@ pub(super) enum Resolution {
 /// Test an [`Expr`] for relevance to Pandas-related operations.
 pub(super) fn test_expression(expr: &Expr, semantic: &SemanticModel) -> Resolution {
     match expr {
+        // Literals in the expression itself are definitely not pandas-related
         Expr::StringLiteral(_)
         | Expr::BytesLiteral(_)
         | Expr::NumberLiteral(_)
@@ -34,12 +37,14 @@ pub(super) fn test_expression(expr: &Expr, semantic: &SemanticModel) -> Resoluti
             semantic
                 .resolve_name(name)
                 .map_or(Resolution::IrrelevantBinding, |id| {
-                    match &semantic.binding(id).kind {
+                    let binding = semantic.binding(id);
+                    match &binding.kind {
                         BindingKind::Argument => {
                             // Avoid, e.g., `self.values`.
                             if matches!(name.id.as_str(), "self" | "cls") {
                                 Resolution::IrrelevantBinding
                             } else {
+                                // Function arguments are treated as relevant unless proven otherwise
                                 Resolution::RelevantLocal
                             }
                         }
@@ -48,16 +53,63 @@ pub(super) fn test_expression(expr: &Expr, semantic: &SemanticModel) -> Resoluti
                         | BindingKind::NamedExprAssignment
                         | BindingKind::LoopVar
                         | BindingKind::Global(_)
-                        | BindingKind::Nonlocal(_, _) => Resolution::RelevantLocal,
-                        BindingKind::Import(import)
-                            if matches!(import.qualified_name().segments(), ["pandas"]) =>
-                        {
-                            Resolution::PandasModule
+                        | BindingKind::Nonlocal(_, _) => {
+                            // Check if this binding comes from a definitively non-pandas source
+                            if let Some(assigned_value) = find_binding_value(binding, semantic) {
+                                // Recurse to check the assigned value
+                                match test_expression(assigned_value, semantic) {
+                                    // If the assigned value is definitively not pandas (literals, etc.)
+                                    Resolution::IrrelevantExpression => {
+                                        Resolution::IrrelevantBinding
+                                    }
+                                    // If it's clearly pandas-related, treat as relevant
+                                    Resolution::RelevantLocal | Resolution::PandasModule => {
+                                        Resolution::RelevantLocal
+                                    }
+                                    // If we got IrrelevantBinding, it means we traced it back to a
+                                    // non-pandas source (e.g., numpy import), so keep it as irrelevant
+                                    Resolution::IrrelevantBinding => Resolution::IrrelevantBinding,
+                                }
+                            } else {
+                                // If we can't determine the source, be liberal and treat as relevant
+                                // to avoid false negatives (e.g., function parameters with annotations)
+                                Resolution::RelevantLocal
+                            }
+                        }
+                        BindingKind::Import(import) => {
+                            let segments = import.qualified_name().segments();
+                            if matches!(segments, ["pandas"]) {
+                                Resolution::PandasModule
+                            } else if matches!(segments, ["numpy"]) {
+                                // Explicitly exclude numpy imports
+                                Resolution::IrrelevantBinding
+                            } else {
+                                Resolution::IrrelevantBinding
+                            }
                         }
                         _ => Resolution::IrrelevantBinding,
                     }
                 })
         }
+        // Recurse for attribute access (e.g., df.values -> check df)
+        Expr::Attribute(attr) => test_expression(attr.value.as_ref(), semantic),
+        // Recurse for call expressions (e.g., pd.DataFrame() -> check pd)
+        Expr::Call(call) => {
+            // Check if this is a pandas function call
+            if let Some(qualified_name) = semantic.resolve_qualified_name(&call.func) {
+                let segments = qualified_name.segments();
+                if segments.starts_with(&["pandas"]) {
+                    return Resolution::RelevantLocal;
+                }
+                // Explicitly exclude numpy function calls
+                if segments.starts_with(&["numpy"]) || segments.starts_with(&["np"]) {
+                    return Resolution::IrrelevantBinding;
+                }
+            }
+            // For other calls, recurse on the function expression
+            test_expression(&call.func, semantic)
+        }
+        // For other expressions, default to relevant to avoid false negatives
         _ => Resolution::RelevantLocal,
     }
 }

crates/ruff_linter/src/rules/pandas_vet/mod.rs

@@ -379,6 +379,7 @@ mod tests {
     )]
     #[test_case(Rule::PandasUseOfInplaceArgument, Path::new("PD002.py"))]
     #[test_case(Rule::PandasNuniqueConstantSeriesCheck, Path::new("PD101.py"))]
+    #[test_case(Rule::PandasUseOfDotValues, Path::new("PD011.py"))]
     fn paths(rule_code: Rule, path: &Path) -> Result<()> {
         let snapshot = format!("{}_{}", rule_code.noqa_code(), path.to_string_lossy());
         let diagnostics = test_path(

crates/ruff_linter/src/rules/pandas_vet/snapshots/ruff_linter__rules__pandas_vet__tests__PD011_PD011.py.snap

@@ -0,0 +1,11 @@
+---
+source: crates/ruff_linter/src/rules/pandas_vet/mod.rs
+---
+PD011 Use `.to_numpy()` instead of `.values`
+  --> PD011.py:37:14
+   |
+35 |     import pandas as pd
+36 |     x = pd.DataFrame()
+37 |     result = x.values
+   |              ^^^^^^^^
+   |