使用列表推导删除列表

Question

如何使用列表推导删除列表中的列表：

delete_canceled = [a_order for a_order in signal_order_position for c_order in signal_order_canceled if
             (a_order[0][0] in c_order[0][0] and a_order[0][1] in c_order[0][1] and a_order[0][4] in c_order[0][4])]

不使用此：

    for delete_can in delete_canceled:
        signal_order_position.remove(delete_can)
        print "removed by canceled"