Modernize Python 2 code to get ready for Python 3

06-code-golf/tf-06-pn.py

@@ -2,10 +2,11 @@
 # My golf score is slightly lower!  
 # Best wishes, Peter Norvig
 
+from __future__ import print_function
 import re, sys, collections
 
 stopwords = set(open('../stop_words.txt').read().split(','))
 words = re.findall('[a-z]{2,}', open(sys.argv[1]).read().lower())
 counts = collections.Counter(w for w in words if w not in stopwords)
 for (w, c) in counts.most_common(25):
-    print w, '-', c
+    print(w, '-', c)