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Issue #15814: Documentation: disallow hashing of multi-dimensional memoryviews.

This commit is contained in:
Stefan Krah 2012-09-02 14:50:56 +02:00
parent 02f66cbe87
commit 9c8ad0737a
1 changed files with 8 additions and 6 deletions
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Doc/library/stdtypes.rst
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@ -2376,8 +2376,9 @@ copying.
>>> data >>> data
bytearray(b'z1spam') bytearray(b'z1spam')
Memoryviews of hashable (read-only) types with formats 'B', 'b' or 'c' One-dimensional memoryviews of hashable (read-only) types with formats
are also hashable. The hash is defined as ``hash(m) == hash(m.tobytes())``:: 'B', 'b' or 'c' are also hashable. The hash is defined as
``hash(m) == hash(m.tobytes())``::
>>> v = memoryview(b'abcefg') >>> v = memoryview(b'abcefg')
>>> hash(v) == hash(b'abcefg') >>> hash(v) == hash(b'abcefg')
@ -2388,12 +2389,13 @@ copying.
True True
.. versionchanged:: 3.3 .. versionchanged:: 3.3
Memoryview objects with formats 'B', 'b' or 'c' are now hashable. One-dimensional memoryviews with formats 'B', 'b' or 'c' are now hashable.
.. note:: .. note::
Hashing of memoryviews with formats other than 'B', 'b' or 'c' is Hashing of memoryviews with formats other than 'B', 'b' or 'c' as well
possible in version 3.3.0, but will raise an error in 3.3.1 in order as hashing of multi-dimensional memoryviews is possible in version 3.3.0,
to be compatible with the new memoryview equality definition. but will raise an error in 3.3.1 in order to be compatible with the new
memoryview equality definition.
:class:`memoryview` has several methods: :class:`memoryview` has several methods: