Il giorno venerdì 1 luglio 2022 alle 00:46:13 UTC+2 ery...@gmail.com ha scritto: > On 6/30/22, Rob Cliffe via Python-list <pytho...@python.org> wrote: > > > > AKAIK it is not possible to give ctypes a bytearray object and persuade > > it to give you a pointer to the actual array data, suitable for passing > > to a DLL. > You're overlooking the from_buffer() method. For example: > > >>> ba = bytearray(10) > >>> ca = (ctypes.c_char * len(ba)).from_buffer(ba) > >>> ca.value = b'spam&eggs' > >>> ba > bytearray(b'spam&eggs\x00') > > Note that the bytearray can't be resized while a view of the data is > exported. For example: > > >>> ba.append(97) > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > BufferError: Existing exports of data: object cannot be re-sized > > >>> del ba[-1] > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > BufferError: Existing exports of data: object cannot be re-sized
Have you had a look at numpy (https://numpy.org/)? Typically, it is used for all scientific applications, supports several different kind of array, fast linear algebra, etc. And of course you can pass an array to a dynamic library with ctypes (https://numpy.org/doc/stable/reference/routines.ctypeslib.html). -- https://mail.python.org/mailman/listinfo/python-list
