On Fri, Jul 25, 2008 at 8:20 PM, Michiel Overtoom <[EMAIL PROTECTED]> wrote: > Mike wrote... > >>Do you happen to know if there is an efficient way to initialize a list >>like this without explicitly writing out each element? > >>>> temp = [[0, 0, 0],[0, 0, 0],[0, 0, 0]] >>>> print temp > [[0, 0, 0], [0, 0, 0], [0, 0, 0]] > >>>> print [[0]*3]*3 > [[0, 0, 0], [0, 0, 0], [0, 0, 0]]
This has the same aliasing problem as the original: >>> x=[[0]*3]*3 >>> x [[0, 0, 0], [0, 0, 0], [0, 0, 0]] >>> x[0][0]=1 >>> x [[1, 0, 0], [1, 0, 0], [1, 0, 0]] BTW this is a FAQ: http://effbot.org/pyfaq/how-do-i-create-a-multidimensional-list.htm Kent _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
