[mlir][python] expose isAttached (#153045)

mlir/lib/Bindings/Python/IRCore.cpp

@@ -3442,6 +3442,14 @@ void mlir::python::populateIRCore(nb::module_ &m) {
             return operation.createOpView();
           },
           "Detaches the operation from its parent block.")
+      .def_prop_ro(
+          "attached",
+          [](PyOperationBase &self) {
+            PyOperation &operation = self.getOperation();
+            operation.checkValid();
+            return operation.isAttached();
+          },
+          "Reports if the operation is attached to its parent block.")
       .def("erase", [](PyOperationBase &self) { self.getOperation().erase(); })
       .def("walk", &PyOperationBase::walk, nb::arg("callback"),
            nb::arg("walk_order") = MlirWalkPostOrder);

mlir/python/mlir/_mlir_libs/_mlir/ir.pyi

@@ -194,6 +194,13 @@ class _OperationBase:
         """
         Detaches the operation from its parent block.
         """
+
+    @property
+    def attached(self) -> bool:
+        """
+        Reports if the operation is attached to its parent block.
+        """
+
     def erase(self) -> None: ...
 
     @overload

mlir/test/python/ir/operation.py

@@ -1021,6 +1021,8 @@ def testDetachFromParent():
     with Context():
         m1 = Module.parse("func.func private @foo()")
         func = m1.body.operations[0].detach_from_parent()
+        # CHECK: func.attached=False
+        print(f"{func.attached=}")
 
         try:
             func.detach_from_parent()