diff --git a/code/hash_example.py b/code/hash_example.py
index 289628b0..3f6e6771 100644
--- a/code/hash_example.py
+++ b/code/hash_example.py
@@ -1,18 +1,18 @@
-
 # example of iterating a nonce in a hashing algorithm's input
 
+from __future__ import print_function
 import hashlib
-    
+
 text = "I am Satoshi Nakamoto"
 
 # iterate nonce from 0 to 19
-for nonce in range(20): 
-    
+for nonce in range(20):
+
     # add the nonce to the end of the text
-    input = text + str(nonce) 
-     
+    input = text + str(nonce)
+
     # calculate the SHA-256 hash of the input (text+nonce)
-    hash = hashlib.sha256(input).hexdigest() 
-    
+    hash = hashlib.sha256(input).hexdigest()
+
     # show the input and hash result
     print(input, '=>',  hash)