add __future__ print_function as print(number, end=' ') won't work in python 2.x

xanpeng · xanpeng · commit be97e4c18a04 · 2015-04-30T11:16:02.000+08:00
diff --git a/iterator.py b/iterator.py
@@ -5,6 +5,8 @@
 
 Implementation of the iterator pattern with a generator"""
 
+from __future__ import print_function
+
 
 def count_to(count):
     """Counts by word numbers, up to a maximum of five"""
