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Issue #24715: Improve sort stability example

This commit is contained in:
Raymond Hettinger 2016-04-26 01:09:32 -07:00
parent 167c81d5ed
commit ff64b3a532
1 changed files with 5 additions and 1 deletions
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6
Doc/howto/sorting.rst
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@ -274,7 +274,11 @@ 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)]
* To create a standard sort order for a class, just add the appropriate rich
comparison methods: