Update implement-stack-using-queues.py

kamyu104 · kamyu104 · commit 40cbc19c8af7 · 2015-06-11T22:15:04.000+08:00
diff --git a/Python/implement-stack-using-queues.py b/Python/implement-stack-using-queues.py
@@ -62,6 +62,7 @@ def top(self):
     def empty(self):
         return self.q_.empty()
 
+
 # Time: push: O(1), pop: O(n), top: O(1)
 # Space: O(n)
 class Stack2:
