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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
bytearray(b'z1spam')
Memoryviews of hashable (read-only) types with formats 'B', 'b' or 'c'
are also hashable. The hash is defined as ``hash(m) == hash(m.tobytes())``::
One-dimensional memoryviews of hashable (read-only) types with formats
'B', 'b' or 'c' are also hashable. The hash is defined as
``hash(m) == hash(m.tobytes())``::
>>> v = memoryview(b'abcefg')
>>> hash(v) == hash(b'abcefg')
@ -2388,12 +2389,13 @@ copying.
True
.. 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::
Hashing of memoryviews with formats other than 'B', 'b' or 'c' is
possible in version 3.3.0, but will raise an error in 3.3.1 in order
to be compatible with the new memoryview equality definition.
Hashing of memoryviews with formats other than 'B', 'b' or 'c' as well
as hashing of multi-dimensional memoryviews is possible in version 3.3.0,
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: