Merge pull request #109 from smartsammler/patch-1

Make the Python 2 aspect more visible

Author: adewes

docs/performance/not_using_iteritems_to_iterate_large_dict.rst

@@ -1,9 +1,9 @@
-Not using ``iteritems()`` to iterate over a large dictionary
-============================================================
+Not using ``iteritems()`` to iterate over a large dictionary in Python 2
+========================================================================
 
 `PEP 234 <https://www.python.org/dev/peps/pep-0234://www.python.org/dev/peps/pep-0234/>`_ defines iteration interface for objects. It also states it has significant impact on performance of dict iteration.
 
-.. note:: This anti-pattern only applies to Python versions 2.x. In Python 3.x ``items()`` returns an iterator (consequently, ``iteritems()`` has been removed from Python 3.x).
+.. note:: This anti-pattern only applies to Python versions 2.x. In Python 3.x ``items()`` returns an iterator (consequently, ``iteritems()`` and Python 2's iterative ``range()`` function, ``xrange()``, have been removed from Python 3.x).
 
 
 Anti-pattern