Message373554
Currently memoryview does not support subclassing:
>>> class B(memoryview): pass
...
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: type 'memoryview' is not an acceptable base type
Subclassing memoryview can be useful when
- class A supports the buffer protocol;
- class B wraps class A and should support the buffer protocol provided by class A;
- class A does not support subclassing.
In this situation,
class B(memoryview):
def __new__(cls, a):
return super(B, cls).__new__(cls, a)
where a is an instance of class A, would let instances of B support the buffer protocol provided by a.
Is there any particular reason why memoryview does not support subclassing? |
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Date |
User |
Action |
Args |
2020-07-12 14:23:24 | mdehoon | set | recipients:
+ mdehoon |
2020-07-12 14:23:24 | mdehoon | set | messageid: <1594563804.44.0.878376005542.issue41285@roundup.psfhosted.org> |
2020-07-12 14:23:24 | mdehoon | link | issue41285 messages |
2020-07-12 14:23:23 | mdehoon | create | |
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