@@ -24,3 +24,6 @@
 recursive = (recursive_list,)
 recursive_list.append(recursive)
 assert repr(recursive) == "([(...)],)"
+
+assert (None, "", 1).index(1) == 2
+assert 1 in (None, "", 1)
@@ -77,7 +77,7 @@ fn contains(vm: &mut VirtualMachine, args: PyFuncArgs, iter_type: PyObjectRef) -
     );
     loop {
         if let Some(element) = get_next_object(vm, iter)? {
-            let equal = vm.call_method(needle, "__eq__", vec![element.clone()])?;
+            let equal = vm._eq(needle.clone(), element.clone())?;
             if objbool::get_value(&equal) {
                 return Ok(vm.new_bool(true));
             } else {
 
@@ -256,7 +256,7 @@ fn list_index(vm: &mut VirtualMachine, args: PyFuncArgs) -> PyResult {
         required = [(list, Some(vm.ctx.list_type())), (needle, None)]
     );
     for (index, element) in get_elements(list).iter().enumerate() {
-        let py_equal = vm.call_method(needle, "__eq__", vec![element.clone()])?;
+        let py_equal = vm._eq(needle.clone(), element.clone())?;
         if objbool::get_value(&py_equal) {
             return Ok(vm.context().new_int(index));
         }
@@ -296,7 +296,7 @@ fn list_contains(vm: &mut VirtualMachine, args: PyFuncArgs) -> PyResult {
         required = [(list, Some(vm.ctx.list_type())), (needle, None)]
     );
     for element in get_elements(list).iter() {
-        match vm.call_method(needle, "__eq__", vec![element.clone()]) {
+        match vm._eq(needle.clone(), element.clone()) {
             Ok(value) => {
                 if objbool::get_value(&value) {
                     return Ok(vm.new_bool(true));
 
@@ -264,7 +264,7 @@ pub fn tuple_index(vm: &mut VirtualMachine, args: PyFuncArgs) -> PyResult {
         required = [(tuple, Some(vm.ctx.tuple_type())), (needle, None)]
     );
     for (index, element) in get_elements(tuple).iter().enumerate() {
-        let py_equal = vm.call_method(needle, "__eq__", vec![element.clone()])?;
+        let py_equal = vm._eq(needle.clone(), element.clone())?;
         if objbool::get_value(&py_equal) {
             return Ok(vm.context().new_int(index));
         }
@@ -279,7 +279,7 @@ pub fn tuple_contains(vm: &mut VirtualMachine, args: PyFuncArgs) -> PyResult {
         required = [(tuple, Some(vm.ctx.tuple_type())), (needle, None)]
     );
     for element in get_elements(tuple).iter() {
-        match vm.call_method(needle, "__eq__", vec![element.clone()]) {
+        match vm._eq(needle.clone(), element.clone()) {
             Ok(value) => {
                 if objbool::get_value(&value) {
                     return Ok(vm.new_bool(true));