From: Martin Panter <vadmium+py@gmail.com>
Date: Sun, 29 Jan 2017 10:00:23 +0000 (+0000)
Subject: Issue #12067: Recommend that hash and equality be consistent
X-Git-Tag: v3.6.1rc1~133^2
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=8dbb0ca573436dcc780ae3fc00941f928f02b708;p=thirdparty%2FPython%2Fcpython.git

Issue #12067: Recommend that hash and equality be consistent
---

diff --git a/Doc/reference/expressions.rst b/Doc/reference/expressions.rst
index 9792399ba74b..ea89486128c6 100644
--- a/Doc/reference/expressions.rst
+++ b/Doc/reference/expressions.rst
@@ -1255,6 +1255,10 @@ 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.