On Wed, Dec 10, 2008 at 3:40 PM, dongzhi <[EMAIL PROTECTED]> wrote: > If I execute part[1], I have got 'a'. If I execute part[2], I have > got ' '. But, if I execute part[1::2], I have got ['a', '', '']. I > don't know why. Please tell me why.
Perhaps you meant: part[1:2] pydoc list This will tell you there are 3 arguments to __getslice__ i, j, y Without doing any further reading I presume from my experience that this works much like range and xrange and that the 3rd parameter is the step size. Consider this: >>> x = [9, 1, 2, 3, 4] >>> x [9, 1, 2, 3, 4] >>> x[1:2] [1] >>> x[1::2] [1, 3] >>> x[1::1] [1, 2, 3, 4] >>> x[1::2] [1, 3] >>> x[1::3] [1, 4] >>> cheers James -- -- -- "Problems are solved by method -- http://mail.python.org/mailman/listinfo/python-list
