I want to create a list of lists, each of which is identical, but which can be modified independently i.e:
>>>x = [ [0], [0], [0] ] >>> x[0].append(1) >>> x [[0, 1], [0], [0]] The above construct works if I have only few items, but if I have many, I'd prefer to write >>> N =3 >>> x =N*[[0]] >>> x [[0], [0], [0]] If I now try extending the lists indepently, I cannot, as they all point to the same list object >>> x[0].append(1) >>> x [[0, 1], [0, 1], [0, 1]] Is there a simple way to create a list of independent lists? Thanks in advance Thomas Philips -- http://mail.python.org/mailman/listinfo/python-list
