Ammar Askar <am...@ammaraskar.com> added the comment:
Check out this part of the FAQ: https://docs.python.org/3/faq/programming.html#how-do-i-create-a-multidimensional-list Essentially, when you did `C = 2*[[]]`, what happens is that the SAME empty list is placed into C[0] and C[1]. Whereas when you do `M = [[],[]]`, you're creating two different lists. You can confirm this using: >>> C = 2*[[]] >>> C[0] is C[1] True >>> M = [[],[]] >>> M[0] is M[1] False ---------- nosy: +ammar2 resolution: -> not a bug stage: -> resolved status: open -> closed _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue38245> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
