[ML][Pipelines] Avoid bool test for expression in do-while scenario (Azure#27212)

* fix: avoid two bool test for expression

* fix: avoid one place bool test

Author: zhengfeiwang

sdk/ml/azure-ai-ml/azure/ai/ml/entities/_builders/condition_node.py

@@ -58,7 +58,7 @@ def _validate_params(self, raise_error=True) -> MutableValidationResult:
         if isinstance(self.condition, InputOutputBase) and self.condition._meta is not None:
             # pylint: disable=protected-access
             output_definition = self.condition._meta
-            if output_definition and not output_definition.is_control:
+            if output_definition is not None and not output_definition.is_control:
                 validation_result.append_error(
                     yaml_path="condition",
                     message=f"'condition' of dsl.condition node must have 'is_control' field "

sdk/ml/azure-ai-ml/azure/ai/ml/entities/_builders/do_while.py

@@ -192,7 +192,10 @@ def _validate_port(self, port, node_ports, port_type, yaml_path):
             port_obj = node_ports.get(port, None)
         else:
             port_obj = port
-        if port_obj and port_obj._owner._instance_id != self.body._instance_id: # pylint: disable=protected-access
+        if (
+            port_obj is not None
+            and port_obj._owner._instance_id != self.body._instance_id  # pylint: disable=protected-access
+        ):
             # Check the port owner is dowhile body.
             validation_result.append_error(
                 yaml_path=yaml_path,
@@ -201,7 +204,7 @@ def _validate_port(self, port, node_ports, port_type, yaml_path):
                     f"dowhile only accept {port_type} of the body: {self.body.name}."
                 ),
             )
-        elif not port_obj or port_obj._name not in node_ports: # pylint: disable=protected-access
+        elif port_obj is None or port_obj._name not in node_ports: # pylint: disable=protected-access
             # Check port is exist in dowhile body.
             validation_result.append_error(
                 yaml_path=yaml_path,