diff --git a/ecosystem/python/parser/src/function/method/validator.rs b/ecosystem/python/parser/src/function/method/validator.rs
index fdeaeead..e3ad18c6 100644
--- a/ecosystem/python/parser/src/function/method/validator.rs
+++ b/ecosystem/python/parser/src/function/method/validator.rs
@@ -1,5 +1,5 @@
 use crate::prelude::*;
-use ligen::parser::ParserConfig;
+use ligen::parser::{ParserConfig, Validator};
 use ligen::ir::Method;
 
 #[derive(Default)]
@@ -13,8 +13,9 @@ impl MethodValidator {
     }
 }
 
-impl MethodValidator {
-    pub fn validate(&self, _method: &mut Method, _config: &ParserConfig) -> Result<()> {
+impl Validator for MethodValidator {
+    type Input = Method;
+    fn validate(&self, _method: &mut Method, _config: &ParserConfig) -> Result<()> {
         Ok(())
     }
 }
\ No newline at end of file
diff --git a/ecosystem/python/parser/src/interface/validator.rs b/ecosystem/python/parser/src/interface/validator.rs
index 3a557330..72ea96ba 100644
--- a/ecosystem/python/parser/src/interface/validator.rs
+++ b/ecosystem/python/parser/src/interface/validator.rs
@@ -1,6 +1,6 @@
 use crate::prelude::*;
 use ligen::ir::{Interface, Function, Identifier};
-use ligen::parser::ParserConfig;
+use ligen::parser::{ParserConfig, Validator};
 
 #[derive(Default)]
 pub struct InterfaceValidator {}
@@ -9,13 +9,6 @@ impl InterfaceValidator {
     pub fn new() -> Self {
         Default::default()
     }
-}
-
-impl InterfaceValidator {
-    pub fn validate(&self, interface: &mut Interface, config: &ParserConfig) -> Result<()> {
-        self.validate_constructor(interface, config)?;
-        Ok(())
-    }
 
     fn validate_constructor(&self, interface: &mut Interface, _config: &ParserConfig) -> Result<()> {
         let indices = interface.methods.iter().enumerate().filter_map(|(i, method)| {
@@ -35,4 +28,12 @@ impl InterfaceValidator {
         }
         Ok(())
     }
+}
+
+impl Validator for InterfaceValidator {
+    type Input = Interface;
+    fn validate(&self, interface: &mut Interface, config: &ParserConfig) -> Result<()> {
+        self.validate_constructor(interface, config)?;
+        Ok(())
+    }
 }
\ No newline at end of file
diff --git a/ecosystem/python/parser/src/macro_attributes/attributes/mod.rs b/ecosystem/python/parser/src/macro_attributes/attributes/mod.rs
index 6101476b..55c94ac5 100644
--- a/ecosystem/python/parser/src/macro_attributes/attributes/mod.rs
+++ b/ecosystem/python/parser/src/macro_attributes/attributes/mod.rs
@@ -11,6 +11,8 @@ use rustpython_parser::ast::{Expr, Keyword};
 #[derive(Default)]
 pub struct AttributesParser {
     path_parser: PathParser,
+    identifier_parser: IdentifierParser,
+    literal_parser: LiteralParser,
 }
 
 impl Parser<WithSource<&Vec<Expr>>> for AttributesParser {
@@ -46,8 +48,8 @@ impl Parser<WithSource<&Keyword>> for AttributesParser {
             .as_ref()
             .map(|arg| arg.to_string())
             .ok_or_else(|| Error::Message("Failed to parse attribute name".to_string()))?;
-        let identifier = IdentifierParser::default().parse(name, config)?;
-        let literal = LiteralParser::default().parse(&input.ast.value, config)?;
+        let identifier = self.identifier_parser.parse(name, config)?;
+        let literal = self.literal_parser.parse(&input.ast.value, config)?;
         Ok(Named::new(identifier, literal).into())
     }
 }
@@ -70,7 +72,7 @@ impl Parser<WithSource<&Expr>> for AttributesParser {
             },
             Expr::Attribute(expr) => {
                 let name = expr.attr.to_string();
-                let identifier = IdentifierParser::default().parse(name, config)?;
+                let identifier = self.identifier_parser.parse(name, config)?;
                 let attributes = Attributes::default();
                 Ok(Group::new(identifier, attributes).into())
             }
diff --git a/ecosystem/python/parser/src/parser/validator.rs b/ecosystem/python/parser/src/parser/validator.rs
index c900e1ed..4f34ae72 100644
--- a/ecosystem/python/parser/src/parser/validator.rs
+++ b/ecosystem/python/parser/src/parser/validator.rs
@@ -1,6 +1,6 @@
 use crate::{prelude::*, function::method::validator::MethodValidator, interface::validator::InterfaceValidator};
 use is_tree::prelude::*;
-use ligen::{ir::{Library, Type, Method, Interface}, parser::ParserConfig};
+use ligen::{ir::{Library, Type, Method, Interface}, parser::{ParserConfig, Validator}};
 use crate::types::type_::TypeValidator;
 
 #[derive(Default)]
diff --git a/ecosystem/python/parser/src/types/type_/validator.rs b/ecosystem/python/parser/src/types/type_/validator.rs
index cd6a37e3..2e65452f 100644
--- a/ecosystem/python/parser/src/types/type_/validator.rs
+++ b/ecosystem/python/parser/src/types/type_/validator.rs
@@ -1,5 +1,6 @@
 use crate::prelude::*;
-use ligen::{ir::{Type, Path}, parser::{ParserConfig, ParserConfigGet}};
+use is_tree::Visitor;
+use ligen::{ir::{Type, Path}, parser::{ParserConfig, ParserConfigGet, Validator}};
 
 #[derive(Default)]
 pub struct TypeValidator {}
@@ -10,13 +11,14 @@ impl TypeValidator {
     }
 }
 
-impl TypeValidator {
-    pub fn validate(&self, type_: &mut Type, config: &ParserConfig) -> Result<()> {
+impl Validator for TypeValidator {
+    type Input = Type;
+    fn validate(&self, type_: &mut Visitor<Type>, config: &ParserConfig) -> Result<()> {
         let name = type_.path.last().identifier.name.as_str();
-        // TODO: Move it to a validation step. It's hard to find it here.
         if config.get(Path::from("ligen::python::as-opaque").join(name)).is_some() {
+            println!("{}", type_.path);
             *type_ = Type::opaque();
         }
         Ok(())
     }
-}
\ No newline at end of file
+}
diff --git a/ligen/parser/src/lib.rs b/ligen/parser/src/lib.rs
index 5e7e2ff2..8ffac148 100644
--- a/ligen/parser/src/lib.rs
+++ b/ligen/parser/src/lib.rs
@@ -1,5 +1,8 @@
 pub mod prelude;
 pub mod assert;
 pub mod utils;
+mod validator;
 mod parser;
-pub use parser::*;
\ No newline at end of file
+
+pub use parser::*;
+pub use validator::*;
\ No newline at end of file
diff --git a/ligen/parser/src/validator/mod.rs b/ligen/parser/src/validator/mod.rs
new file mode 100644
index 00000000..d8b9b8e8
--- /dev/null
+++ b/ligen/parser/src/validator/mod.rs
@@ -0,0 +1,6 @@
+use crate::{prelude::*, ParserConfig};
+
+pub trait Validator {
+    type Input;
+    fn validate(&self, input: &mut Self::Input, config: &ParserConfig) -> Result<()>;
+}
\ No newline at end of file