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| author |   Martin Panter <vadmium+py@gmail.com> | 2017-01-29 10:07:26 +0000 |
|---|---|---|
| committer | Martin Panter <vadmium+py@gmail.com> | 2017-01-29 10:07:26 +0000 |
| commit | 2be98894059a13529d5696afb8fcb33408d2e9dd (patch) | |
| tree | ff85c59cf05f889748a66372007eb216b6045fac /Doc/reference/expressions.rst | |
| parent | Issue 29310: Document typing.NamedTuple default argument syntax (diff) | |
| parent | Issue #12067: Recommend that hash and equality be consistent (diff) | |
| download | cpython-2be98894059a13529d5696afb8fcb33408d2e9dd.tar.gz cpython-2be98894059a13529d5696afb8fcb33408d2e9dd.tar.bz2 cpython-2be98894059a13529d5696afb8fcb33408d2e9dd.zip | |
Issues #12067: Merge hash recommendation from 3.5
Diffstat (limited to 'Doc/reference/expressions.rst')
| -rw-r--r-- | Doc/reference/expressions.rst | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Doc/reference/expressions.rst b/Doc/reference/expressions.rst index b37df92d59a..3a4b80557ca 100644 --- a/Doc/reference/expressions.rst +++ b/Doc/reference/expressions.rst @@ -1415,6 +1415,10 @@ some consistency rules, if possible: sequences, but not to sets or mappings). See also the :func:`~functools.total_ordering` decorator. +* The :func:`hash` result should be consistent with equality. + Objects that are equal should either have the same hash value, + or be marked as unhashable. + Python does not enforce these consistency rules. In fact, the not-a-number values are an example for not following these rules. |