[Python-Dev] Hashable memoryviews

Antoine Pitrou solipsis at pitrou.net
Sun Nov 13 01:23:59 CET 2011

Hello everyone and Benjamin,

Currently, memoryview objects are unhashable:

>>> hash(memoryview(b""))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: unhashable type: 'memoryview'

Compare with Python 2.7:

>>> hash(buffer(""))

memoryviews already support equality comparison:

>>> b"" == memoryview(b"")

If the original object providing the buffer is hashable, then it
seems to make sense for the memoryview object to be hashable. This came
while porting Twisted to Python 3.

What do you think?



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