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| author | Raymond Hettinger <python@rcn.com> | 2016-04-26 08:11:10 (GMT) |
|---|---|---|
| committer | Raymond Hettinger <python@rcn.com> | 2016-04-26 08:11:10 (GMT) |
| commit | b9531bcdcce35c443f1b7c6f1c79ed8ae575f36b (patch) | |
| tree | d598a561fc059c96400815d0e2911c1a9e0a8431 /Doc/howto | |
| parent | b3b366d803207eb580a315a2b49733f100e92e89 (diff) | |
| download | cpython-b9531bcdcce35c443f1b7c6f1c79ed8ae575f36b.zip cpython-b9531bcdcce35c443f1b7c6f1c79ed8ae575f36b.tar.gz cpython-b9531bcdcce35c443f1b7c6f1c79ed8ae575f36b.tar.bz2 | |
Issue #24715: Improve sort stability example
Diffstat (limited to 'Doc/howto')
| -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 |