diff --git a/python/072_Edit_Distance.py b/python/072_Edit_Distance.py
index e9033cc..f0cdc13 100644
--- a/python/072_Edit_Distance.py
+++ b/python/072_Edit_Distance.py
@@ -24,7 +24,7 @@ class Solution(object):
 
     def minDistance(self, word1, word2):
         ls_1, ls_2 = len(word1), len(word2)
-        dp = range(ls_1 + 1)
+        dp = list(range(ls_1 + 1))
         for j in range(1, ls_2 + 1):
             pre = dp[0]
             dp[0] = j
@@ -36,3 +36,10 @@ def minDistance(self, word1, word2):
                     dp[i] = min(pre + 1, dp[i] + 1, dp[i - 1] + 1)
                 pre = temp
         return dp[ls_1]
+    
+    
+if __name__ == '__main__':
+    # begin
+    s = Solution()
+    print (s.minDistance("horse","ros"))        
+    print (s.minDistance("intention","execution"))            
diff --git a/python/078_Subsets.py b/python/078_Subsets.py
index 9e3dfc0..8738707 100644
--- a/python/078_Subsets.py
+++ b/python/078_Subsets.py
@@ -55,4 +55,4 @@ def subsets(self, nums):
 
 if __name__ == "__main__":
     s = Solution()
-    print s.subsets([1,2,3])
+    print (s.subsets([1,2,3]))