New submission from Laurent Gautier <lgaut...@gmail.com>:
The buffer protocol is accounting for the row-major or column-major arrays, and
that information is shown in the attributes, `c_contiguous` and `f_contiguous`
respectively, of a memoryview object.
Using the method `cast` allows one to specify a shape but does not allow
to specify whether row or column major:
```
# column-major 3x2 array of bytes that was serialized
b = bytearray([1,2,3,4,5,6])
mv = memoryview(b)
mv_b = mv.cast('b', shape=(3,2))
```
The result object is believed to be row-major and little can be done
to correct it:
```
>>> mv_int.c_contiguous
True
>>> mv_int.c_contiguous = False
AttributeError: attribute 'c_contiguous' of 'memoryview' objects is not writable
```
----------
components: Interpreter Core
messages: 326167
nosy: lgautier
priority: normal
severity: normal
status: open
title: Memoryview for column-major (f_contiguous) arrays from bytes impossible
to achieve
type: enhancement
versions: Python 3.4, Python 3.5, Python 3.6, Python 3.7, Python 3.8
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue34778>
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