diff --git a/odoo-rpc.py b/odoo-rpc.py
index 9d8d79b..6df4675 100755
--- a/odoo-rpc.py
+++ b/odoo-rpc.py
@@ -468,18 +468,24 @@ def export_json( model, domains ):
 						else:
 							print('Already exists %s' % (_filename) )
 
+def uniq( arr ):
+	return list(set(arr))
+
+def groupby_model( arr ):
+	res = {}
+	for muid in arr:
+		model, id = muid.split('/')
+		if not model in res:
+			res[model] = [] 
+		res[model].append( int(id) )
+	return res
 
 def save( model, domains ):
 	force = OPTS['force'] if 'force' in OPTS else False
 	models = flatten_stack( lookup( model, domains ) )
-	unique_models = list(set(models))
+	unique_models = uniq( models )
 	jlog( unique_models )
-	to_browse = {}
-	for muid in unique_models:
-		model, id = muid.split('/')
-		if not model in to_browse:
-			to_browse[model] = [] 
-		to_browse[model].append( id )
+	to_browse = groupby_model( unique_models )
 	
 	return to_browse