diff --git a/data/maker/__init__.py b/data/maker/__init__.py
index 2b53def..2921b46 100644
--- a/data/maker/__init__.py
+++ b/data/maker/__init__.py
@@ -263,6 +263,7 @@ class Generator (Learner):
 
         pass
     def format(self,_df,_schema):
+        r = {}
         for _item in _schema :
             name = _item['name']
             
@@ -273,9 +274,12 @@ class Generator (Learner):
                 else:
                     if _item['type'] == ['DATETIME','TIMESTAMP'] :
                         FORMAT = '%Y-%d-%m %H:%M:%S'
-                self.log(**{'action':'format','input':{'name':name,'format':FORMAT}})
+                r[name] = FORMAT
+                
                 
                 _df[name] = pd.to_datetime(_df[name], format=FORMAT).astype(str) #.astype('datetime64[ns]')
+        if r :
+            self.log(**{'action':'format','input':r})
         return _df
 
         pass