New submission from Simon R: I've simply tested the example reported in the py3k documentation, and it don't works.
See the site: http://docs.python.org/py3k/library/multiprocessing.html?highlight=multiprocessing#module-multiprocessing.sharedctypes The program exit with this error: > python sha.py Traceback (most recent call last): File "sha.py", line 21, in <module> s = Array('c', 'hello world', lock=lock) File "/usr/lib/python3.2/multiprocessing/sharedctypes.py", line 112, in Array obj = RawArray(typecode_or_type, size_or_initializer) File "/usr/lib/python3.2/multiprocessing/sharedctypes.py", line 89, in RawArray result.__init__(*size_or_initializer) TypeError: one character string expected Observe that the following code works correctly with python2! I'm using python 3.2.3 and gcc 4.7.1 under ArchLinx Te code is: http://docs.python.org/py3k/library/multiprocessing.html?highlight=multiprocessing#module-multiprocessing.sharedctypes #################################################################### from multiprocessing import Process, Lock from multiprocessing.sharedctypes import Value, Array from ctypes import Structure, c_double class Point(Structure): _fields_ = [('x', c_double), ('y', c_double)] def modify(n, x, s, A): n.value **= 2 x.value **= 2 s.value = s.value.upper() for a in A: a.x **= 2 a.y **= 2 if __name__ == '__main__': lock = Lock() n = Value('i', 7) x = Value(c_double, 1.0/3.0, lock=False) s = Array('c', 'hello world', lock=lock) A = Array(Point, [(1.875,-6.25), (-5.75,2.0), (2.375,9.5)], lock=lock) p = Process(target=modify, args=(n, x, s, A)) p.start() p.join() print((n.value)) print((x.value)) print((s.value)) print([(a.x, a.y) for a in A]) ---------- components: ctypes messages: 170171 nosy: bred priority: normal severity: normal status: open title: multiprocessing sharedctypes Array don't accept strings type: crash versions: Python 3.2 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue15901> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
