New submission from Marvin Mundry <marvin....@gmx.de>: >>> m1=[[0,0,0,0]]*4 >>> m1 [[0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0]] >>> m1[0][0]+=1 >>> m1 [[1, 0, 0, 0], [1, 0, 0, 0], [1, 0, 0, 0], [1, 0, 0, 0]]
after initializing an array of arrays as done in the first line of the code snippet all elements in the array point to the same object in memory. ---------- components: None messages: 117581 nosy: mastermarv priority: normal severity: normal status: open title: Pointer problem in initializing array of arrays versions: Python 2.6 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue9982> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
