diff --git a/androscalpel/src/annotation.rs b/androscalpel/src/annotation.rs
index 1c4412b..68baed1 100644
--- a/androscalpel/src/annotation.rs
+++ b/androscalpel/src/annotation.rs
@@ -11,7 +11,7 @@ use crate::{
 };
 
 /// Annotation with a visibility
-#[pyclass]
+#[pyclass(eq)]
 #[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
 pub struct DexAnnotationItem {
     // TODO: the get/set will probably be wonky on the python side when edditing
@@ -32,10 +32,6 @@ pub struct DexAnnotationItem {
 
 #[pymethods]
 impl DexAnnotationItem {
-    pub fn __eq__(&self, other: &Self) -> bool {
-        self == other
-    }
-
     #[new]
     pub fn new(annotation: DexAnnotation) -> Self {
         Self {
@@ -126,7 +122,7 @@ impl<V: VisitorMut> VisitableMut<V> for DexAnnotationItem {
 }
 
 /// An annotation.
-#[pyclass]
+#[pyclass(eq)]
 #[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
 pub struct DexAnnotation {
     // TODO: check the relation between type and encoded_value.
@@ -142,10 +138,6 @@ pub struct DexAnnotation {
 
 #[pymethods]
 impl DexAnnotation {
-    pub fn __eq__(&self, other: &Self) -> bool {
-        self == other
-    }
-
     #[new]
     pub fn new(type_: IdType, elements: HashMap<DexString, DexValue>) -> Self {
         Self { type_, elements }
diff --git a/androscalpel/src/apk.rs b/androscalpel/src/apk.rs
index 7da2c16..e1bddbc 100644
--- a/androscalpel/src/apk.rs
+++ b/androscalpel/src/apk.rs
@@ -28,7 +28,7 @@ pub struct DexFile {
 }
 
 /// Represent an apk.
-#[pyclass]
+#[pyclass(eq)]
 #[derive(Debug, Clone, PartialEq, Default, Deserialize, Serialize)]
 pub struct Apk {
     pub dex_files: HashMap<String, DexFile>, // TODO: use accessort for chache invalidation
@@ -3087,10 +3087,6 @@ impl Apk {
         Ok(())
     }
 
-    pub fn __eq__(&self, other: &Self) -> bool {
-        self == other
-    }
-
     #[pyo3(name = "gen_raw_dex")] //Sad GIL noise
     pub fn py_gen_raw_dex(&self, py: Python<'_>) -> Result<HashMap<String, PyObject>> {
         Ok(self
diff --git a/androscalpel/src/class.rs b/androscalpel/src/class.rs
index e5c2096..7a26c0a 100644
--- a/androscalpel/src/class.rs
+++ b/androscalpel/src/class.rs
@@ -12,7 +12,7 @@ use crate::{
 use androscalpel_serializer::consts::*;
 
 /// Represent an apk
-#[pyclass]
+#[pyclass(eq)]
 #[derive(Debug, Clone, Deserialize, Serialize, PartialEq)]
 pub struct Class {
     /// Type, format described at
@@ -382,10 +382,6 @@ impl Class {
         }
         flags
     }
-
-    pub fn __eq__(&self, other: &Self) -> bool {
-        self == other
-    }
 }
 
 impl<V: Visitor> Visitable<V> for Class {
diff --git a/androscalpel/src/code.rs b/androscalpel/src/code.rs
index 2df1cfd..93dbee1 100644
--- a/androscalpel/src/code.rs
+++ b/androscalpel/src/code.rs
@@ -16,7 +16,7 @@ use crate::{
 // type TmpHandlerType = (Vec<(IdType, u32)>, Option<u32>);
 
 /// The code run by a method.
-#[pyclass]
+#[pyclass(eq)]
 #[derive(Debug, Clone, Deserialize, Serialize)]
 pub struct Code {
     // TODO: remove and compute this value from code?
@@ -39,6 +39,7 @@ pub struct Code {
     pub insns: Vec<Instruction>,
 }
 
+// TODO reimplement PartialEq: label should become address independant
 impl PartialEq for Code {
     fn eq(&self, other: &Self) -> bool {
         let comparable_self = self.semantic_comparable().unwrap();
@@ -50,8 +51,6 @@ impl PartialEq for Code {
     }
 }
 
-// TODO reimplement PartialEq: label should become address independant
-
 #[pymethods]
 impl Code {
     pub fn to_json(&self) -> Result<String> {
@@ -150,10 +149,6 @@ impl Code {
         handles
     }
 
-    pub fn __eq__(&self, other: &Self) -> bool {
-        self == other
-    }
-
     /// Return all the labels used by instrutions in the code.
     pub fn get_referenced_label(&self) -> HashSet<String> {
         let mut used_labels = HashSet::new();
diff --git a/androscalpel/src/dex_id.rs b/androscalpel/src/dex_id.rs
index b49b6c0..a232df7 100644
--- a/androscalpel/src/dex_id.rs
+++ b/androscalpel/src/dex_id.rs
@@ -2,12 +2,10 @@
 
 use serde::{Deserialize, Serialize};
 use std::cmp::{Ord, Ordering, PartialOrd};
-use std::collections::hash_map::DefaultHasher;
 use std::collections::HashSet;
-use std::hash::{Hash, Hasher};
+use std::hash::Hash;
 
 use anyhow::{anyhow, bail, Context};
-use pyo3::class::basic::CompareOp;
 use pyo3::prelude::*;
 
 use crate::{scalar::*, DexString, DexValue, Result, Visitable, VisitableMut, Visitor, VisitorMut};
@@ -15,7 +13,7 @@ use androscalpel_serializer::{StringDataItem, Uleb128};
 
 /// The type of a method. The shorty is formated as described in
 /// <https://source.android.com/docs/core/runtime/dex-format#shortydescriptor>
-#[pyclass]
+#[pyclass(eq, ord, hash, frozen)]
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct IdMethodType {
     /// Type formated as described by  <https://source.android.com/docs/core/runtime/dex-format#shortydescriptor>
@@ -167,12 +165,6 @@ impl IdMethodType {
         self.parameters.clone()
     }
 
-    pub fn __hash__(&self) -> u64 {
-        let mut hasher = DefaultHasher::new();
-        self.hash(&mut hasher);
-        hasher.finish()
-    }
-
     /// Return all strings referenced in the Id.
     pub fn get_all_strings(&self) -> HashSet<DexString> {
         let mut strings = HashSet::new();
@@ -198,10 +190,6 @@ impl IdMethodType {
         protos.insert(self.clone());
         protos
     }
-
-    fn __richcmp__(&self, other: &Self, op: CompareOp) -> bool {
-        op.matches(self.cmp(other))
-    }
 }
 
 impl SmaliName for IdMethodType {
@@ -241,7 +229,7 @@ impl IdMethodType {
 /// as described here <https://source.android.com/docs/core/runtime/dex-format#typedescriptor>
 // Not a clean rust enum because we want to be compatible with python, and maybe support strange
 // malware edge case?
-#[pyclass]
+#[pyclass(eq, ord, hash, frozen)]
 #[derive(Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
 pub struct IdType(pub(crate) DexString);
 
@@ -620,12 +608,6 @@ impl IdType {
         }
     }
 
-    pub fn __hash__(&self) -> u64 {
-        let mut hasher = DefaultHasher::new();
-        self.hash(&mut hasher);
-        hasher.finish()
-    }
-
     /// Return all strings referenced in the Id.
     pub fn get_all_strings(&self) -> HashSet<DexString> {
         let mut strings = HashSet::new();
@@ -639,10 +621,6 @@ impl IdType {
         types.insert(self.clone());
         types
     }
-
-    fn __richcmp__(&self, other: &Self, op: CompareOp) -> bool {
-        op.matches(self.cmp(other))
-    }
     // TODO: TESTS
 }
 
@@ -658,7 +636,7 @@ impl SmaliName for IdType {
     }
 }
 
-#[pyclass]
+#[pyclass(eq, ord, hash, frozen)]
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct IdField {
     /// The name of the field, format described at
@@ -770,12 +748,6 @@ impl IdField {
         format!("IdField(\"{name}\", {ty}, {class})")
     }
 
-    pub fn __hash__(&self) -> u64 {
-        let mut hasher = DefaultHasher::new();
-        self.hash(&mut hasher);
-        hasher.finish()
-    }
-
     /// Return all strings referenced in the Id.
     pub fn get_all_strings(&self) -> HashSet<DexString> {
         let mut strings = HashSet::new();
@@ -799,10 +771,6 @@ impl IdField {
         fields.insert(self.clone());
         fields
     }
-
-    fn __richcmp__(&self, other: &Self, op: CompareOp) -> bool {
-        op.matches(self.cmp(other))
-    }
 }
 
 impl Ord for IdField {
@@ -835,7 +803,7 @@ impl SmaliName for IdField {
 }
 
 /// The Id of a method.
-#[pyclass]
+#[pyclass(eq, ord, hash, frozen)]
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct IdMethod {
     /// The class containing the method.
@@ -966,12 +934,6 @@ impl IdMethod {
         )
     }
 
-    pub fn __hash__(&self) -> u64 {
-        let mut hasher = DefaultHasher::new();
-        self.hash(&mut hasher);
-        hasher.finish()
-    }
-
     /// Return all strings referenced in the Id.
     pub fn get_all_strings(&self) -> HashSet<DexString> {
         let mut strings = HashSet::new();
@@ -1002,10 +964,6 @@ impl IdMethod {
         method_ids.insert(self.clone());
         method_ids
     }
-
-    fn __richcmp__(&self, other: &Self, op: CompareOp) -> bool {
-        op.matches(self.cmp(other))
-    }
 }
 
 impl Ord for IdMethod {
@@ -1040,8 +998,8 @@ impl SmaliName for IdMethod {
     }
 }
 
-#[pyclass]
-#[derive(Debug, Clone, PartialEq, Eq, Ord, PartialOrd)]
+#[pyclass(eq, ord, hash, frozen)]
+#[derive(Debug, Clone, PartialEq, Eq, Ord, PartialOrd, Hash)]
 pub struct IdEnum(pub IdField);
 
 impl<V: Visitor> Visitable<V> for IdEnum {
@@ -1098,10 +1056,6 @@ impl IdEnum {
     pub fn get_all_field_ids(&self) -> HashSet<IdField> {
         self.0.get_all_field_ids()
     }
-
-    fn __richcmp__(&self, other: &Self, op: CompareOp) -> bool {
-        op.matches(self.cmp(other))
-    }
 }
 
 // Not to sure about this one
diff --git a/androscalpel/src/dex_string.rs b/androscalpel/src/dex_string.rs
index b9f0016..080a2aa 100644
--- a/androscalpel/src/dex_string.rs
+++ b/androscalpel/src/dex_string.rs
@@ -1,15 +1,13 @@
 use crate::{Result, Visitable, VisitableMut, Visitor, VisitorMut};
+use pyo3::exceptions::PyTypeError;
 use serde::{Deserialize, Deserializer, Serialize, Serializer};
 use std::cmp::{Ord, PartialOrd};
-use std::collections::hash_map::DefaultHasher;
 use std::collections::HashSet;
-use std::hash::{Hash, Hasher};
+use std::hash::Hash;
 
-use pyo3::class::basic::CompareOp;
-use pyo3::exceptions::PyTypeError;
 use pyo3::prelude::*;
 
-#[pyclass]
+#[pyclass(eq, ord, frozen, hash)]
 #[derive(Clone, PartialEq, Eq, Ord, PartialOrd)]
 pub struct DexString(pub androscalpel_serializer::StringDataItem);
 
@@ -198,23 +196,10 @@ impl DexString {
         self.into()
     }
 
-    fn __hash__(&self) -> u64 {
-        let mut hasher = DefaultHasher::new();
-        self.hash(&mut hasher);
-        hasher.finish()
-    }
-
     /// Return all strings references in the value.
     pub fn get_all_strings(&self) -> HashSet<DexString> {
         let mut strings = HashSet::new();
         strings.insert(self.clone());
         strings
     }
-
-    fn __richcmp__(&self, other: &Bound<'_, PyAny>, op: CompareOp) -> PyResult<bool> {
-        let other: Self = other
-            .extract()
-            .or(<String as FromPyObject>::extract_bound(other).map(|string| string.into()))?;
-        Ok(op.matches(self.0.cmp(&other.0)))
-    }
 }
diff --git a/androscalpel/src/field.rs b/androscalpel/src/field.rs
index c887089..1bc4962 100644
--- a/androscalpel/src/field.rs
+++ b/androscalpel/src/field.rs
@@ -12,7 +12,7 @@ use crate::{
 use androscalpel_serializer::consts::*;
 
 /// Represent a field.
-#[pyclass]
+#[pyclass(eq)]
 #[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
 pub struct Field {
     /// The structure used to reference this field.
@@ -252,10 +252,6 @@ impl Field {
     pub fn has_annotations(&self) -> bool {
         !self.annotations.is_empty()
     }
-
-    pub fn __eq__(&self, other: &Self) -> bool {
-        self == other
-    }
 }
 
 impl<V: Visitor> Visitable<V> for Field {
diff --git a/androscalpel/src/instructions.rs b/androscalpel/src/instructions.rs
index d1743f1..bcebdc3 100644
--- a/androscalpel/src/instructions.rs
+++ b/androscalpel/src/instructions.rs
@@ -31,9 +31,8 @@ const I32_MIN_AS_I64: i64 = i32::MIN as i64;
 const I32_MAX_AS_I64: i64 = i32::MAX as i64;
 const U16_MAX_AS_USIZE: usize = u16::MAX as usize;
 
-// TODO: impl Eq for call site to derive here?
+#[pyclass(eq)]
 #[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
-#[pyclass]
 pub enum Instruction {
     /// Waste a cycle.
     Nop {},
@@ -2097,10 +2096,6 @@ macro_rules! raw_ins_invoke {
 
 #[pymethods]
 impl Instruction {
-    pub fn __eq__(&self, other: &Self) -> bool {
-        self == other
-    }
-
     pub fn to_json(&self) -> Result<String> {
         Ok(serde_json::to_string(self)?)
     }
@@ -6601,7 +6596,7 @@ impl Instruction {
     }
 }
 
-#[pyclass]
+#[pyclass(eq)]
 #[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
 pub struct CallSite {
     #[pyo3(get)]
@@ -6616,10 +6611,6 @@ pub struct CallSite {
 
 #[pymethods]
 impl CallSite {
-    pub fn __eq__(&self, other: &Self) -> bool {
-        self == other
-    }
-
     pub fn to_json(&self) -> Result<String> {
         Ok(serde_json::to_string(self)?)
     }
diff --git a/androscalpel/src/method.rs b/androscalpel/src/method.rs
index b95c0e6..fd55307 100644
--- a/androscalpel/src/method.rs
+++ b/androscalpel/src/method.rs
@@ -12,7 +12,7 @@ use crate::{
 use androscalpel_serializer::consts::*;
 
 /// Represent a method.
-#[pyclass]
+#[pyclass(eq)]
 #[derive(Debug, Clone, Deserialize, Serialize, PartialEq)]
 pub struct Method {
     /// The structure used to reference this method.
@@ -293,10 +293,6 @@ impl Method {
                 .iter()
                 .any(|list| !list.is_empty())
     }
-
-    pub fn __eq__(&self, other: &Self) -> bool {
-        self == other
-    }
 }
 
 impl<V: Visitor> Visitable<V> for Method {
diff --git a/androscalpel/src/method_handle.rs b/androscalpel/src/method_handle.rs
index 12ca574..e2ed216 100644
--- a/androscalpel/src/method_handle.rs
+++ b/androscalpel/src/method_handle.rs
@@ -13,8 +13,8 @@ use crate::{
 };
 
 /// The structure use to reference a method invocation.
+#[pyclass(eq)]
 #[derive(Debug, Clone, PartialEq, Eq, Hash, Deserialize, Serialize)]
-#[pyclass]
 pub enum MethodHandle {
     StaticPut { field: IdField },
     StaticGet { field: IdField },
diff --git a/androscalpel/src/scalar.rs b/androscalpel/src/scalar.rs
index 4db05da..849c24a 100644
--- a/androscalpel/src/scalar.rs
+++ b/androscalpel/src/scalar.rs
@@ -10,7 +10,7 @@ use crate::{
 };
 use pyo3::prelude::*;
 
-#[pyclass]
+#[pyclass(eq)]
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Deserialize, Serialize)]
 pub struct DexByte(pub i8);
 #[pymethods]
@@ -42,7 +42,7 @@ impl DexByte {
     }
 }
 
-#[pyclass]
+#[pyclass(eq)]
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Deserialize, Serialize)]
 pub struct DexShort(pub i16);
 #[pymethods]
@@ -74,7 +74,7 @@ impl DexShort {
     }
 }
 
-#[pyclass]
+#[pyclass(eq)]
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Deserialize, Serialize)]
 pub struct DexChar(pub u16);
 #[pymethods]
@@ -106,7 +106,7 @@ impl DexChar {
     }
 }
 
-#[pyclass]
+#[pyclass(eq)]
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Deserialize, Serialize)]
 pub struct DexInt(pub i32);
 #[pymethods]
@@ -138,7 +138,7 @@ impl DexInt {
     }
 }
 
-#[pyclass]
+#[pyclass(eq)]
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Deserialize, Serialize)]
 pub struct DexLong(pub i64);
 #[pymethods]
@@ -170,7 +170,7 @@ impl DexLong {
     }
 }
 
-#[pyclass]
+#[pyclass(eq)]
 #[derive(Debug, Clone, Copy, PartialEq, Deserialize, Serialize)]
 pub struct DexFloat(pub f32);
 #[pymethods]
@@ -202,7 +202,7 @@ impl DexFloat {
     }
 }
 
-#[pyclass]
+#[pyclass(eq)]
 #[derive(Debug, Clone, Copy, PartialEq, Deserialize, Serialize)]
 pub struct DexDouble(pub f64);
 #[pymethods]
@@ -235,7 +235,7 @@ impl DexDouble {
 }
 
 /* DexString is already define in lib.rs, TODO: move the version in lib.rs here
-#[pyclass]
+#[pyclass(eq)]
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub struct DexString(pub u32);
 #[pymethods]
@@ -268,7 +268,7 @@ impl DexString {
 }
 */
 
-#[pyclass]
+#[pyclass(eq)]
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Deserialize, Serialize)]
 pub struct DexNull;
 #[pymethods]
@@ -296,7 +296,7 @@ impl DexNull {
     }
 }
 
-#[pyclass]
+#[pyclass(eq)]
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Deserialize, Serialize)]
 pub struct DexBoolean(pub bool);
 #[pymethods]
@@ -328,7 +328,7 @@ impl DexBoolean {
     }
 }
 
-#[pyclass]
+#[pyclass(eq)]
 #[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
 pub struct DexArray(pub Vec<DexValue>);
 #[pymethods]