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Provide ctypes.memoryview_at() #112015
Description
Feature or enhancement
Proposal:
It should be possible to easily make memoryview objects from pointer-able ctypes objects with an arbitrary length. In the same way we can currently use ctypes.string_at() to create bytes objects. The advantage of using memoryview objects is that we can elide a buffer copy.
import ctypes
a = (ctypes.c_ubyte * 10)()
ctypes.buffer_at(a, 10, True)[0] = 1
assert a[0] == 1
a[0] = 2
assert ctypes.buffer_at(a, 10, True)[0] == 2Has this already been discussed elsewhere?
This is a minor feature, which does not need previous discussion elsewhere
Links to previous discussion of this feature:
No response
Activity
rianhunter commentedon Sep 19, 2024
Abandoned
ncoghlan commentedon Sep 26, 2024
@encukou is taking up work on the associated PR. Thanks for taking it this far @rianhunter!
[-]Provide `ctypes.buffer_at()`[/-][+]Provide `ctypes.memoryview_at()`[/+]gh-112015: Implement `ctypes.memoryview_at()` (GH-112018)
encukou commentedon Jan 3, 2025
And it's in!
Thank you @rianhunter for the proposal and implementation, and all the reviewers for their insights.
pythongh-112015: Implement `ctypes.memoryview_at()` (pythonGH-112018)
pythongh-112015: Implement `ctypes.memoryview_at()` (pythonGH-112018)