New submission from void abuser <void4bu...@gmail.com>:
So basically the bug that I found was about adding a number to a sub-list. If you declare li1 as li1=[[0,0,0,0],[0,0,0,0],[0,0,0,0],[0,0,0,0]] in the code below then the code is working as it should do. Although if you create the list called li1 with the same way how I did in the code below (which has the same outcome in terms of looking at that 2 dimension list) then the output is different and in fact false. The code: li1=[[0]*4]*4 for x in range(4): li1[0][1]+=1 print(li1) Expected behavior Expected output: [[0, 1, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0]] [[0, 2, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0]] [[0, 3, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0]] [[0, 4, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0]] The output that I got: [[0, 1, 0, 0], [0, 1, 0, 0], [0, 1, 0, 0], [0, 1, 0, 0]] [[0, 2, 0, 0], [0, 2, 0, 0], [0, 2, 0, 0], [0, 2, 0, 0]] [[0, 3, 0, 0], [0, 3, 0, 0], [0, 3, 0, 0], [0, 3, 0, 0]] [[0, 4, 0, 0], [0, 4, 0, 0], [0, 4, 0, 0], [0, 4, 0, 0]] ---------- components: Regular Expressions files: bug.png messages: 381698 nosy: ezio.melotti, mrabarnett, void4buser priority: normal severity: normal status: open title: Adding number to a declared 2 dimension list type: behavior versions: Python 3.9 Added file: https://bugs.python.org/file49615/bug.png _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue42449> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
