HCT added the comment: more examples (using 64-bit integer vs 8-bit integer in the above example) to show that ctypes aren't being translated for memoryview properly. _pack_ is the only way to make memoryview handle ctypes properly
>>> import ctypes >>> class B1(ctypes.Structure): ... _fields_ = [( "data", ctypes.c_uint64 * 256 ), ] ... _pack_ = 1 ... >>> class B2(ctypes.Structure): ... _fields_ = [( "data", ctypes.c_uint64 * 256 ), ] ... >>> >>> a = B1() >>> b = B2() >>> memoryview( a ).cast( 'B' ) <memory at 0x01FFB030> >>> memoryview( b ).cast( 'B' ) Traceback (most recent call last): File "<stdin>", line 1, in <module> ValueError: memoryview: source format must be a native single character format prefixed with an optional '@' >>> ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue19803> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
