[Python-checkins] cpython (2.7): Issue #24715: Improve sort stability example

[raymond.hettinger]

https://hg.python.org/cpython/rev/ba87f7f246e0
changeset:   101151:ba87f7f246e0
branch:      2.7
user:        Raymond Hettinger <python at rcn.com>
date:        Tue Apr 26 01:09:32 2016 -0700
summary:
  Issue #24715: Improve sort stability example

files:
  Doc/howto/sorting.rst |  6 +++++-
  1 files changed, 5 insertions(+), 1 deletions(-)


diff --git a/Doc/howto/sorting.rst b/Doc/howto/sorting.rst
--- a/Doc/howto/sorting.rst
+++ b/Doc/howto/sorting.rst
@@ -274,7 +274,11 @@
   twice:
 
     >>> data = [('red', 1), ('blue', 1), ('red', 2), ('blue', 2)]
-    >>> assert sorted(data, reverse=True) == list(reversed(sorted(reversed(data))))
+    >>> standard_way = sorted(data, key=itemgetter(0), reverse=True)
+    >>> double_reversed = list(reversed(sorted(reversed(data), key=itemgetter(0))))
+    >>> assert standard_way == double_reversed
+    >>> standard_way
+    [('red', 1), ('red', 2), ('blue', 1), ('blue', 2)]
 
 * To create a standard sort order for a class, just add the appropriate rich
   comparison methods:

-- 
Repository URL: https://hg.python.org/cpython