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| -rw-r--r-- | Doc/howto/sorting.rst | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/Doc/howto/sorting.rst b/Doc/howto/sorting.rst index 10cb94c..0334b26 100644 --- a/Doc/howto/sorting.rst +++ b/Doc/howto/sorting.rst @@ -262,7 +262,11 @@ Odd and Ends 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)] * The sort routines are guaranteed to use :meth:`__lt__` when making comparisons between two objects. So, it is easy to add a standard sort order to a class by |