schema: adds ability to use with_choice option in children calls

This patch adds ability to use with_choice within RPC and Notification

Signed-off-by: Stefan Gula <steweg@gmail.com>

Author: steweg

libyang/schema.py

@@ -1679,8 +1679,8 @@ class SRpcInOut(SNode):
     def __iter__(self) -> Iterator[SNode]:
         return self.children()
 
-    def children(self, types: Optional[Tuple[int, ...]] = None) -> Iterator[SNode]:
-        return iter_children(self.context, self.cdata, types=types)
+    def children(self, types: Optional[Tuple[int, ...]] = None, with_choice: bool = False) -> Iterator[SNode]:
+        return iter_children(self.context, self.cdata, types=types, with_choice=with_choice)
 
 
 # -------------------------------------------------------------------------------------
@@ -1710,11 +1710,11 @@ def output(self) -> Optional[SRpcInOut]:
     def __iter__(self) -> Iterator[SNode]:
         return self.children()
 
-    def children(self, types: Optional[Tuple[int, ...]] = None) -> Iterator[SNode]:
-        yield from iter_children(self.context, self.cdata, types=types)
+    def children(self, types: Optional[Tuple[int, ...]] = None, with_choice: bool = False) -> Iterator[SNode]:
+        yield from iter_children(self.context, self.cdata, types=types, with_choice=with_choice)
         # With libyang2, you can get only input or output
         # To keep behavior, we iter 2 times witt output options
-        yield from iter_children(self.context, self.cdata, types=types, output=True)
+        yield from iter_children(self.context, self.cdata, types=types, output=True, with_choice=with_choice)
 
 
 # -------------------------------------------------------------------------------------
@@ -1723,8 +1723,8 @@ class SNotif(SNode):
     def __iter__(self) -> Iterator[SNode]:
         return self.children()
 
-    def children(self, types: Optional[Tuple[int, ...]] = None) -> Iterator[SNode]:
-        return iter_children(self.context, self.cdata, types=types)
+    def children(self, types: Optional[Tuple[int, ...]] = None, with_choice: bool = False) -> Iterator[SNode]:
+        return iter_children(self.context, self.cdata, types=types, with_choice=with_choice)
 
 
 # -------------------------------------------------------------------------------------

tests/test_schema.py

@@ -494,6 +494,8 @@ def test_rpc_attrs(self):
         self.assertEqual(self.rpc.nodetype(), SNode.RPC)
         self.assertEqual(self.rpc.keyword(), "rpc")
         self.assertEqual(self.rpc.schema_path(), "/yolo-system:format-disk")
+        choice = next(self.rpc.input().children((SNode.CHOICE,), with_choice=True))
+        self.assertIsInstance(choice, SChoice)
 
     def test_rpc_extensions(self):
         ext = list(self.rpc.extensions())

tests/yang/yolo/yolo-system.yang

@@ -191,7 +191,14 @@ module yolo-system {
         ext:human-name "Disk";
         type types:str;
       }
-      anyxml html-info;
+      choice xml-or-json {
+        case xml {
+          anyxml html-info;
+        }
+        case json {
+          anydata json-info;
+        }
+      }
     }
     output {
       leaf duration {