several list.append => one list.extend

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@32726 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/XMLMatrix.py

@@ -496,9 +496,8 @@ class XMLMatrix(Folder):
       cell_id_list = [base_id]
 
       base_item = self.index[base_id]
-      for i, my_id in enumerate(kw):
       try:
-          cell_id_list.append(base_item[i][my_id])
+        cell_id_list.extend(base_item[i][my_id] for i, my_id in enumerate(kw))
       except KeyError:
         raise KeyError, 'Invalid key: %s' % str(kw)