If I do: a = [ [0,0,0], [0,0,0], [0,0,0] ] a[0][1] = 1
I get: a = [ [0,1,0],[0,0,0],[0,0,0] ] as expected But if I do: a = [ [0] * 3 ] * 3 a[0][1] = 1 I get a = [[0,1,0],[0,1,0],[0,1,0]] AFAIC, "*" is supposed to generate multiple copies of the given token. Therefore I thought both cases would be the same, but they are not. Can anyone explain to me what exactly is going on in the second case? -- http://mail.python.org/mailman/listinfo/python-list
