nios lookup errors out when there are no results #37970 (#39027)

* Update nios.py

* Update nios.py

* Update nios.py

* nios lookup errors out when there are no results #37970  Open	

Indentation failure issue resolved

* Returning empty list instead of None

In case of no results, res will be returned as an empty list instead of None (implementing ganeshrn comment)

lib/ansible/plugins/lookup/nios.py

@@ -108,7 +108,10 @@ class LookupModule(LookupBase):
         provider = kwargs.pop('provider', {})
         wapi = WapiLookup(provider)
         res = wapi.get_object(obj_type, filter_data, return_fields=return_fields)
-        for obj in res:
+        if res is not None:
-            if 'extattrs' in obj:
+            for obj in res:
-                obj['extattrs'] = flatten_extattrs(obj['extattrs'])
+                if 'extattrs' in obj:
+                    obj['extattrs'] = flatten_extattrs(obj['extattrs'])
+        else:
+            res = []
         return res