New submission from Michiel de Hoon <[email protected]>:
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?
----------
components: C API
messages: 373554
nosy: mdehoon
priority: normal
severity: normal
status: open
title: memoryview does not support subclassing
type: enhancement
versions: Python 3.10, Python 3.5, Python 3.6, Python 3.7, Python 3.8, Python
3.9
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Python tracker <[email protected]>
<https://bugs.python.org/issue41285>
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