diff --git a/appPublic/timecost.py b/appPublic/timecost.py
index 5b611fd..5cb9615 100755
--- a/appPublic/timecost.py
+++ b/appPublic/timecost.py
@@ -1,32 +1,33 @@
 import time
 import datetime
-# from .Singleton import SingletonDecorator
+from .Singleton import SingletonDecorator
 
-BEGIN=0
-END=1
-
-def datetimeStr(t):
-	dt = time.localtime(t)
-	return time.strftime('%Y-%m-%d %H:%M:%S',dt)
+timerecord = {}
 
 class TimeCost:
-	timerecord = {}
 	def __init__(self,name):
 		self.name = name
 	
 	def __enter__(self):
 		self.begin_time = time.time()
 	
-	def __exit__(self):
+	def __exit__(self,*args):
 		self.end_time = time.time()
-		d = self.timerecord.get('name',[])
+		d = timerecord.get(self.name,[])
 		d.append(self.end_time - self.begin_time)
+		timerecord[self.name] = d
+
+	def clear(self):
+		timerecord = {}
 
 	def getTimeCost(self,name):
-		x = self.timerecord.get('name',[])
+		x = timerecord.get(name,[])
+		if len(x) == 0:
+			return 0,0,0
 		return len(x), sum(x), sum(x)/len(x)
 	
 	def show(self):
-		for name in self.timerecord.keys():
+		print('TimeCost ....')
+		for name in timerecord.keys():
 			print(name, * self.getTimeCost(name))