[Mlir-commits] [mlir] [MLIR][Python] Register `OpAttributeMap` as `Mapping` for `match` compatibility (PR #174292)

[Maksim Levental]

================
@@ -2388,6 +2388,16 @@ PyOpAttributeMap::dunderGetItemNamed(const std::string &name) {
   return PyAttribute(operation->getContext(), attr).maybeDownCast();
 }
 
+nb::object PyOpAttributeMap::getWithDefaultNamed(const std::string &key,
+                                                 nb::object defaultValue) {
+  MlirAttribute attr =
+      mlirOperationGetAttributeByName(operation->get(), toMlirStringRef(key));
+  if (mlirAttributeIsNull(attr)) {
+    return defaultValue;
+  }
----------------
makslevental wrote:

nit:
```suggestion
  if (mlirAttributeIsNull(attr))
    return defaultValue;
```

https://github.com/llvm/llvm-project/pull/174292