Update decode-ways.py

Author: kamyu104

Python/decode-ways.py

@@ -22,7 +22,7 @@ def numDecodings(self, s):
         if len(s) == 0 or s[0] == '0':
             return 0
         prev, prev_prev = 1, 0
-        for i in range(len(s)):
+        for i in xrange(len(s)):
             current = 0
             if s[i] != '0':
                 current = prev
@@ -33,4 +33,4 @@ def numDecodings(self, s):
 
 if __name__ == "__main__":
     for i in ["0", "10", "10", "103", "1032", "10323"]:
-        print Solution().numDecodings(i)
+        print Solution().numDecodings(i)