Merge branch 'serde-compatability' of github.com:bveeramani/sagemaker-python-sdk into serde-compatability

Author: Balaji Veeramani

src/sagemaker/cli/compatibility/v2/modifiers/serde.py

@@ -150,7 +150,7 @@ def modify_node(self, node):
             return node
 
         namespace_name = NEW_CLASS_NAME_TO_NAMESPACES[new_class_name][0]
-        subpackage_name = namespace_name[namespace_name.find(".") + 1 :]
+        subpackage_name = namespace_name.split(".")[1]
         assert subpackage_name in {"serializers", "deserializers"}
         return pasta.parse("%s.%s()" % (subpackage_name, new_class_name)).body[0].value
 
@@ -246,10 +246,7 @@ def modify_node(self, node):
             else:
                 i += 1
 
-        if not node.names:
-            return None
-
-        return node
+        return node if node.names else None
 
 
 class SerdeImportFromAmazonCommonRenamer(Modifier):