New submission from Alexander Belopolsky:
Starting with the example in memoryview documentation:
>>> from ctypes import BigEndianStructure, c_long
>>> class BEPoint(BigEndianStructure):
... _fields_ = [("x", c_long), ("y", c_long)]
...
>>> point = BEPoint(100, 200)
>>> a = memoryview(point)
I am trying to unpack the resulting view:
>>> a.tolist()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
NotImplementedError: memoryview: unsupported format T{>l:x:>l:y:}
>>> struct.unpack_from(a.format,a)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
struct.error: bad char in struct format
>>> struct.unpack_from('>ll',a)
(0, 100)
It looks like there is one or more bugs in play here.
----------
messages: 169771
nosy: belopolsky, skrah
priority: normal
severity: normal
status: open
title: memoryview of a ctypes struct has incompatible invalid format
type: behavior
versions: Python 3.3, Python 3.4
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue15857>
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