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Issue #24715: Improve sort stability example

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This commit is contained in:
Raymond Hettinger 2016-04-26 01:11:10 -07:00
parent b3b366d803
commit b9531bcdcc
1 changed files with 5 additions and 1 deletions
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6
Doc/howto/sorting.rst
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@ -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