diff --git a/ast/asdl_rs.py b/ast/asdl_rs.py
index 8a3b8e0..a16c46e 100755
--- a/ast/asdl_rs.py
+++ b/ast/asdl_rs.py
@@ -1053,11 +1053,12 @@ class ToPyo3AstVisitor(EmitVisitor):
         if type.value.attributes and self.namespace == "located":
             self.emit(
                 """
-                instance.setattr(py, "lineno", _range.start.row.get())?;
-                instance.setattr(py, "col_offset", _range.start.column.get())?;
+                let cache = ast_key_cache().get().unwrap();
+                instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+                instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
                 if let Some(end) = _range.end {
-                    instance.setattr(py, "end_lineno", end.row.get())?;
-                    instance.setattr(py, "end_col_offset", end.column.get())?;
+                    instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+                    instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
                 }
                 """,
                 1,
@@ -1148,8 +1149,7 @@ class Pyo3StructVisitor(EmitVisitor):
                     }}
                     impl ToPyObject for {rust_name} {{
                         fn to_object(&self, py: Python) -> PyObject {{
-                            let initializer = PyClassInitializer::from(AST)
-                            .add_subclass(self.clone());
+                            let initializer = Self::new();
                             Py::new(py, initializer).unwrap().into_py(py)
                         }}
                     }}
diff --git a/ast/src/gen/pyo3_wrapper_located.rs b/ast/src/gen/pyo3_wrapper_located.rs
index d5fa4f9..ba55ee2 100644
--- a/ast/src/gen/pyo3_wrapper_located.rs
+++ b/ast/src/gen/pyo3_wrapper_located.rs
@@ -19,7 +19,7 @@ impl Mod {
 }
 impl ToPyObject for Mod {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
@@ -207,7 +207,7 @@ impl Stmt {
 }
 impl ToPyObject for Stmt {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
@@ -1481,7 +1481,7 @@ impl Expr {
 }
 impl ToPyObject for Expr {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
@@ -2671,7 +2671,7 @@ impl ExprContext {
 }
 impl ToPyObject for ExprContext {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
@@ -2731,7 +2731,7 @@ impl Boolop {
 }
 impl ToPyObject for Boolop {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
@@ -2779,7 +2779,7 @@ impl Operator {
 }
 impl ToPyObject for Operator {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
@@ -2959,7 +2959,7 @@ impl Unaryop {
 }
 impl ToPyObject for Unaryop {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
@@ -3031,7 +3031,7 @@ impl Cmpop {
 }
 impl ToPyObject for Cmpop {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
@@ -3226,7 +3226,7 @@ impl Excepthandler {
 }
 impl ToPyObject for Excepthandler {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
@@ -3582,7 +3582,7 @@ impl Pattern {
 }
 impl ToPyObject for Pattern {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
@@ -3938,7 +3938,7 @@ impl TypeIgnore {
 }
 impl ToPyObject for TypeIgnore {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
diff --git a/ast/src/gen/pyo3_wrapper_ranged.rs b/ast/src/gen/pyo3_wrapper_ranged.rs
index 3920dc8..dfa0a30 100644
--- a/ast/src/gen/pyo3_wrapper_ranged.rs
+++ b/ast/src/gen/pyo3_wrapper_ranged.rs
@@ -19,7 +19,7 @@ impl Mod {
 }
 impl ToPyObject for Mod {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
@@ -207,7 +207,7 @@ impl Stmt {
 }
 impl ToPyObject for Stmt {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
@@ -1481,7 +1481,7 @@ impl Expr {
 }
 impl ToPyObject for Expr {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
@@ -2671,7 +2671,7 @@ impl ExprContext {
 }
 impl ToPyObject for ExprContext {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
@@ -2731,7 +2731,7 @@ impl Boolop {
 }
 impl ToPyObject for Boolop {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
@@ -2779,7 +2779,7 @@ impl Operator {
 }
 impl ToPyObject for Operator {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
@@ -2959,7 +2959,7 @@ impl Unaryop {
 }
 impl ToPyObject for Unaryop {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
@@ -3031,7 +3031,7 @@ impl Cmpop {
 }
 impl ToPyObject for Cmpop {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
@@ -3226,7 +3226,7 @@ impl Excepthandler {
 }
 impl ToPyObject for Excepthandler {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
@@ -3582,7 +3582,7 @@ impl Pattern {
 }
 impl ToPyObject for Pattern {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
@@ -3938,7 +3938,7 @@ impl TypeIgnore {
 }
 impl ToPyObject for TypeIgnore {
     fn to_object(&self, py: Python) -> PyObject {
-        let initializer = PyClassInitializer::from(AST).add_subclass(self.clone());
+        let initializer = Self::new();
         Py::new(py, initializer).unwrap().into_py(py)
     }
 }
diff --git a/ast/src/gen/to_pyo3.rs b/ast/src/gen/to_pyo3.rs
index 1d6dbe4..c8a7478 100644
--- a/ast/src/gen/to_pyo3.rs
+++ b/ast/src/gen/to_pyo3.rs
@@ -2794,11 +2794,12 @@ impl ToPyo3Ast for crate::StmtFunctionDef<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -2831,11 +2832,12 @@ impl ToPyo3Ast for crate::StmtAsyncFunctionDef<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -2866,11 +2868,12 @@ impl ToPyo3Ast for crate::StmtClassDef<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -2888,11 +2891,12 @@ impl ToPyo3Ast for crate::StmtReturn<SourceRange> {
         } = self;
         let instance = cache.0.call1(py, (value.to_pyo3_ast(py)?,))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -2910,11 +2914,12 @@ impl ToPyo3Ast for crate::StmtDelete<SourceRange> {
         } = self;
         let instance = cache.0.call1(py, (targets.to_pyo3_ast(py)?,))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -2941,11 +2946,12 @@ impl ToPyo3Ast for crate::StmtAssign<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -2972,11 +2978,12 @@ impl ToPyo3Ast for crate::StmtAugAssign<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3005,11 +3012,12 @@ impl ToPyo3Ast for crate::StmtAnnAssign<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3040,11 +3048,12 @@ impl ToPyo3Ast for crate::StmtFor<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3075,11 +3084,12 @@ impl ToPyo3Ast for crate::StmtAsyncFor<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3106,11 +3116,12 @@ impl ToPyo3Ast for crate::StmtWhile<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3137,11 +3148,12 @@ impl ToPyo3Ast for crate::StmtIf<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3168,11 +3180,12 @@ impl ToPyo3Ast for crate::StmtWith<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3199,11 +3212,12 @@ impl ToPyo3Ast for crate::StmtAsyncWith<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3224,11 +3238,12 @@ impl ToPyo3Ast for crate::StmtMatch<SourceRange> {
             .0
             .call1(py, (subject.to_pyo3_ast(py)?, cases.to_pyo3_ast(py)?))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3249,11 +3264,12 @@ impl ToPyo3Ast for crate::StmtRaise<SourceRange> {
             .0
             .call1(py, (exc.to_pyo3_ast(py)?, cause.to_pyo3_ast(py)?))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3282,11 +3298,12 @@ impl ToPyo3Ast for crate::StmtTry<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3315,11 +3332,12 @@ impl ToPyo3Ast for crate::StmtTryStar<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3340,11 +3358,12 @@ impl ToPyo3Ast for crate::StmtAssert<SourceRange> {
             .0
             .call1(py, (test.to_pyo3_ast(py)?, msg.to_pyo3_ast(py)?))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3362,11 +3381,12 @@ impl ToPyo3Ast for crate::StmtImport<SourceRange> {
         } = self;
         let instance = cache.0.call1(py, (names.to_pyo3_ast(py)?,))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3393,11 +3413,12 @@ impl ToPyo3Ast for crate::StmtImportFrom<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3415,11 +3436,12 @@ impl ToPyo3Ast for crate::StmtGlobal<SourceRange> {
         } = self;
         let instance = cache.0.call1(py, (names.to_pyo3_ast(py)?,))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3437,11 +3459,12 @@ impl ToPyo3Ast for crate::StmtNonlocal<SourceRange> {
         } = self;
         let instance = cache.0.call1(py, (names.to_pyo3_ast(py)?,))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3459,11 +3482,12 @@ impl ToPyo3Ast for crate::StmtExpr<SourceRange> {
         } = self;
         let instance = cache.0.call1(py, (value.to_pyo3_ast(py)?,))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3478,11 +3502,12 @@ impl ToPyo3Ast for crate::StmtPass<SourceRange> {
         let instance = cache.0.call0(py)?;
         let Self { range: _range } = self;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3497,11 +3522,12 @@ impl ToPyo3Ast for crate::StmtBreak<SourceRange> {
         let instance = cache.0.call0(py)?;
         let Self { range: _range } = self;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3516,11 +3542,12 @@ impl ToPyo3Ast for crate::StmtContinue<SourceRange> {
         let instance = cache.0.call0(py)?;
         let Self { range: _range } = self;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3577,11 +3604,12 @@ impl ToPyo3Ast for crate::ExprBoolOp<SourceRange> {
             .0
             .call1(py, (op.to_pyo3_ast(py)?, values.to_pyo3_ast(py)?))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3602,11 +3630,12 @@ impl ToPyo3Ast for crate::ExprNamedExpr<SourceRange> {
             .0
             .call1(py, (target.to_pyo3_ast(py)?, value.to_pyo3_ast(py)?))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3633,11 +3662,12 @@ impl ToPyo3Ast for crate::ExprBinOp<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3658,11 +3688,12 @@ impl ToPyo3Ast for crate::ExprUnaryOp<SourceRange> {
             .0
             .call1(py, (op.to_pyo3_ast(py)?, operand.to_pyo3_ast(py)?))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3683,11 +3714,12 @@ impl ToPyo3Ast for crate::ExprLambda<SourceRange> {
             .0
             .call1(py, (args.to_pyo3_ast(py)?, body.to_pyo3_ast(py)?))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3714,11 +3746,12 @@ impl ToPyo3Ast for crate::ExprIfExp<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3739,11 +3772,12 @@ impl ToPyo3Ast for crate::ExprDict<SourceRange> {
             .0
             .call1(py, (keys.to_pyo3_ast(py)?, values.to_pyo3_ast(py)?))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3761,11 +3795,12 @@ impl ToPyo3Ast for crate::ExprSet<SourceRange> {
         } = self;
         let instance = cache.0.call1(py, (elts.to_pyo3_ast(py)?,))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3786,11 +3821,12 @@ impl ToPyo3Ast for crate::ExprListComp<SourceRange> {
             .0
             .call1(py, (elt.to_pyo3_ast(py)?, generators.to_pyo3_ast(py)?))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3811,11 +3847,12 @@ impl ToPyo3Ast for crate::ExprSetComp<SourceRange> {
             .0
             .call1(py, (elt.to_pyo3_ast(py)?, generators.to_pyo3_ast(py)?))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3842,11 +3879,12 @@ impl ToPyo3Ast for crate::ExprDictComp<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3867,11 +3905,12 @@ impl ToPyo3Ast for crate::ExprGeneratorExp<SourceRange> {
             .0
             .call1(py, (elt.to_pyo3_ast(py)?, generators.to_pyo3_ast(py)?))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3889,11 +3928,12 @@ impl ToPyo3Ast for crate::ExprAwait<SourceRange> {
         } = self;
         let instance = cache.0.call1(py, (value.to_pyo3_ast(py)?,))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3911,11 +3951,12 @@ impl ToPyo3Ast for crate::ExprYield<SourceRange> {
         } = self;
         let instance = cache.0.call1(py, (value.to_pyo3_ast(py)?,))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3933,11 +3974,12 @@ impl ToPyo3Ast for crate::ExprYieldFrom<SourceRange> {
         } = self;
         let instance = cache.0.call1(py, (value.to_pyo3_ast(py)?,))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3964,11 +4006,12 @@ impl ToPyo3Ast for crate::ExprCompare<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -3995,11 +4038,12 @@ impl ToPyo3Ast for crate::ExprCall<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4026,11 +4070,12 @@ impl ToPyo3Ast for crate::ExprFormattedValue<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4048,11 +4093,12 @@ impl ToPyo3Ast for crate::ExprJoinedStr<SourceRange> {
         } = self;
         let instance = cache.0.call1(py, (values.to_pyo3_ast(py)?,))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4073,11 +4119,12 @@ impl ToPyo3Ast for crate::ExprConstant<SourceRange> {
             .0
             .call1(py, (value.to_pyo3_ast(py)?, kind.to_pyo3_ast(py)?))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4104,11 +4151,12 @@ impl ToPyo3Ast for crate::ExprAttribute<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4135,11 +4183,12 @@ impl ToPyo3Ast for crate::ExprSubscript<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4160,11 +4209,12 @@ impl ToPyo3Ast for crate::ExprStarred<SourceRange> {
             .0
             .call1(py, (value.to_pyo3_ast(py)?, ctx.to_pyo3_ast(py)?))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4185,11 +4235,12 @@ impl ToPyo3Ast for crate::ExprName<SourceRange> {
             .0
             .call1(py, (id.to_pyo3_ast(py)?, ctx.to_pyo3_ast(py)?))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4210,11 +4261,12 @@ impl ToPyo3Ast for crate::ExprList<SourceRange> {
             .0
             .call1(py, (elts.to_pyo3_ast(py)?, ctx.to_pyo3_ast(py)?))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4235,11 +4287,12 @@ impl ToPyo3Ast for crate::ExprTuple<SourceRange> {
             .0
             .call1(py, (elts.to_pyo3_ast(py)?, ctx.to_pyo3_ast(py)?))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4266,11 +4319,12 @@ impl ToPyo3Ast for crate::ExprSlice<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4333,11 +4387,12 @@ impl ToPyo3Ast for crate::ExcepthandlerExceptHandler<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4396,11 +4451,12 @@ impl ToPyo3Ast for crate::Arg<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4421,11 +4477,12 @@ impl ToPyo3Ast for crate::Keyword<SourceRange> {
             .0
             .call1(py, (arg.to_pyo3_ast(py)?, value.to_pyo3_ast(py)?))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4446,11 +4503,12 @@ impl ToPyo3Ast for crate::Alias<SourceRange> {
             .0
             .call1(py, (name.to_pyo3_ast(py)?, asname.to_pyo3_ast(py)?))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4531,11 +4589,12 @@ impl ToPyo3Ast for crate::PatternMatchValue<SourceRange> {
         } = self;
         let instance = cache.0.call1(py, (value.to_pyo3_ast(py)?,))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4553,11 +4612,12 @@ impl ToPyo3Ast for crate::PatternMatchSingleton<SourceRange> {
         } = self;
         let instance = cache.0.call1(py, (value.to_pyo3_ast(py)?,))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4575,11 +4635,12 @@ impl ToPyo3Ast for crate::PatternMatchSequence<SourceRange> {
         } = self;
         let instance = cache.0.call1(py, (patterns.to_pyo3_ast(py)?,))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4606,11 +4667,12 @@ impl ToPyo3Ast for crate::PatternMatchMapping<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4639,11 +4701,12 @@ impl ToPyo3Ast for crate::PatternMatchClass<SourceRange> {
             ),
         )?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4661,11 +4724,12 @@ impl ToPyo3Ast for crate::PatternMatchStar<SourceRange> {
         } = self;
         let instance = cache.0.call1(py, (name.to_pyo3_ast(py)?,))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4686,11 +4750,12 @@ impl ToPyo3Ast for crate::PatternMatchAs<SourceRange> {
             .0
             .call1(py, (pattern.to_pyo3_ast(py)?, name.to_pyo3_ast(py)?))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
@@ -4708,11 +4773,12 @@ impl ToPyo3Ast for crate::PatternMatchOr<SourceRange> {
         } = self;
         let instance = cache.0.call1(py, (patterns.to_pyo3_ast(py)?,))?;
 
-        instance.setattr(py, "lineno", _range.start.row.get())?;
-        instance.setattr(py, "col_offset", _range.start.column.get())?;
+        let cache = ast_key_cache().get().unwrap();
+        instance.setattr(py, cache.lineno.as_ref(py), _range.start.row.get())?;
+        instance.setattr(py, cache.col_offset.as_ref(py), _range.start.column.get())?;
         if let Some(end) = _range.end {
-            instance.setattr(py, "end_lineno", end.row.get())?;
-            instance.setattr(py, "end_col_offset", end.column.get())?;
+            instance.setattr(py, cache.end_lineno.as_ref(py), end.row.get())?;
+            instance.setattr(py, cache.end_col_offset.as_ref(py), end.column.get())?;
         }
 
         Ok(instance)
diff --git a/ast/src/pyo3.rs b/ast/src/pyo3.rs
index 253ab91..e54fff2 100644
--- a/ast/src/pyo3.rs
+++ b/ast/src/pyo3.rs
@@ -1,8 +1,10 @@
 use crate::{source_code::SourceRange, text_size::TextRange, ConversionFlag, Node};
 use num_complex::Complex64;
 use once_cell::sync::OnceCell;
-use pyo3::prelude::*;
-use pyo3::types::{PyBytes, PyList, PyTuple};
+use pyo3::{
+    prelude::*,
+    types::{PyBytes, PyList, PyString, PyTuple},
+};
 
 pub trait Pyo3Node {
     fn py_type_cache() -> &'static OnceCell<(Py<PyAny>, Py<PyAny>)> {
@@ -123,7 +125,28 @@ fn cache_py_type<N: Pyo3Node + Node>(ast_module: &PyAny) -> PyResult<()> {
     Ok(())
 }
 
+struct AstKeyCache {
+    lineno: Py<PyString>,
+    col_offset: Py<PyString>,
+    end_lineno: Py<PyString>,
+    end_col_offset: Py<PyString>,
+}
+
+fn ast_key_cache() -> &'static OnceCell<AstKeyCache> {
+    {
+        static PY_TYPE: OnceCell<AstKeyCache> = OnceCell::new();
+        &PY_TYPE
+    }
+}
+
 pub fn init(py: Python) -> PyResult<()> {
+    ast_key_cache().get_or_init(|| AstKeyCache {
+        lineno: pyo3::intern!(py, "lineno").into_py(py),
+        col_offset: pyo3::intern!(py, "col_offset").into_py(py),
+        end_lineno: pyo3::intern!(py, "end_lineno").into_py(py),
+        end_col_offset: pyo3::intern!(py, "end_col_offset").into_py(py),
+    });
+
     init_types(py)
 }