Modernize Python 2 code to get ready for Python 3

05-pipeline/tf-05.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python
+from __future__ import print_function
 import sys, re, operator, string
 
 #
@@ -65,7 +66,7 @@ def print_all(word_freqs):
     Takes a list of pairs where the entries are sorted by frequency and print them recursively.
     """
     if(len(word_freqs) > 0):
-        print word_freqs[0][0], ' - ', word_freqs[0][1]
+        print(word_freqs[0][0], ' - ', word_freqs[0][1])
         print_all(word_freqs[1:]);
 
 #