macros: Use macro-defined name for enums in __repr__

CHANGELOG.md

@@ -59,6 +59,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fix FFI definition `PyGetSetDef` to have `*const c_char` for `doc` member (not `*mut c_char`). [#2439](https://github.com/PyO3/pyo3/pull/2439)
 - Fix `#[pyo3(from_py_with = "...")]` being ignored for 1-element tuple structs and transparent structs. [#2440](https://github.com/PyO3/pyo3/pull/2440)
 - Use `memoffset` for computing PyCell offsets [#2450](https://github.com/PyO3/pyo3/pull/2450)
+- Fix incorrect enum names being returned by `repr` for enums renamed by `#[pyclass(name)]` [#2457](https://github.com/PyO3/pyo3/pull/2457)
 
 ## [0.16.5] - 2022-05-15
 

pyo3-macros-backend/src/pyclass.rs

@@ -433,7 +433,7 @@ fn impl_enum_class(
         let variants_repr = variants.iter().map(|variant| {
             let variant_name = variant.ident;
             // Assuming all variants are unit variants because they are the only type we support.
-            let repr = format!("{}.{}", cls, variant_name);
+            let repr = format!("{}.{}", get_class_python_name(cls, args), variant_name);
             quote! { #cls::#variant_name => #repr, }
         });
         let mut repr_impl: syn::ImplItemMethod = syn::parse_quote! {

tests/test_enum.rs

@@ -161,3 +161,17 @@ enum TestReprParse {
 fn test_repr_parse() {
     assert_eq!(std::mem::align_of::<TestReprParse>(), 8);
 }
+
+#[pyclass(name = "MyEnum")]
+#[derive(Debug, PartialEq, Clone)]
+pub enum RenameEnum {
+    Variant,
+}
+
+#[test]
+fn test_rename_enum_repr_correct() {
+    Python::with_gil(|py| {
+        let var1 = Py::new(py, RenameEnum::Variant).unwrap();
+        py_assert!(py, var1, "repr(var1) == 'MyEnum.Variant'");
+    })
+}