feat: add Operator.id property

feat: add test for Operator.id

Author: Matteo-Baussart-ANSYS

src/ansys/dpf/core/dpf_operator.py

@@ -127,6 +127,7 @@ def __init__(self, name=None, config=None, server=None, operator=None):
         self._internal_obj = None
         self._description = None
         self._inputs = None
+        self._id = None
 
         # step 1: get server
         self._server = server_module.get_or_create_server(
@@ -657,6 +658,15 @@ def config(self, value):
         """
         self._api.operator_set_config(self, value)
 
+    @property
+    def id(self):
+        if self._id is None:
+            operator_id_op = Operator("operator_id", server=self._server)
+            operator_id_op.connect_operator_as_input(0, self)
+            self._id = operator_id_op.outputs.id()
+
+        return self._id
+
     @property
     def inputs(self):
         """Inputs connected to the operator.

tests/test_operator.py

@@ -1424,3 +1424,19 @@ def test_operator_input_output_streams(server_in_process, simple_bar):
     time_provider.connect(pin=3, inpt=streams)
     times = time_provider.outputs.time_freq_support()
     assert times
+
+
+@pytest.mark.skipif(
+    not conftest.SERVERS_VERSION_GREATER_THAN_OR_EQUAL_TO_10_0,
+    reason="Operator `workflow_to_workflow_topology` does not exist below 10.0",
+)
+def test_operator_id(server_type):
+    ids = set()
+
+    for _ in range(10):
+        op = ops.utility.forward(server=server_type)
+
+        assert op.id >= 0
+        assert op.id not in ids
+
+        ids.add(op.id)