On Sep 7, 1:16 pm, Ulrich Eckhardt <eckha...@satorlaser.com> wrote: > sajuptpm wrote: > > I have a list of tuples l = [((cpu_util,mem_util),(disk_util)), > > ((cpu_util,mem_util),(disk_util))] > > ie, l = [((30,50),(70)), ((50,20),(20))] > > > l.sort(key=lambda x:(-x[0][0], x[1][0])) > > # sorting cpu_util asc and disk_util desc > > One thing here: Without knowing what special meaning the indices have, this > code is impossible to understand. In my opinion, that code should rather be > > l.sort(key=lambda x: (-x.cpu_util, x.disk_util)) > > You could then save the comment, which btw may or may not describe the > actual code. > > > suppose i changed order that is l = [((mem_util,cpu_util), > > (disk_util)), ((mem_util,cpu_util),(disk_util))] > > So i have to change the sort code to l.sort(key=lambda x:(-x[0][1], > > x[1][0])) # sorting cpu_util asc and disk_util desc > > > I want to use same (common) sort code, that must work even if i > > changed tuple order. > > You don't have to use a lambda function. You can as well define the sorting > order in the same place of your code where you define the order inside the > elements, that way you would only have to adjust the sorting in one place. > > Otherwise, you will have to embed the order of the tuple inside the tuple or > the containing list. One approach would be to have a dictionary (which has > no order), or you use a separate type instead: > > class record(object): > pass > > r = record() > r.cpu_util = 12 > r.disk_util = 42 > l.append(r) > > However, this basically all boils down to either "don't use the sorting > (dict)" or "keep records sorted", so it doesn't really answer your > question. However, I'm afraid there is no answer to your question as it > stands. Maybe I could help you better if you explained why the order > changes etc, because normally I don't deal with data that has such a > volatile meaning, I rather normalize it on input and then use it in the > same way afterwards. > > Uli > > -- > Sator Laser GmbH > Geschäftsführer: Thorsten Föcking, Amtsgericht Hamburg HR B62 932
[((cpu_util,mem_util),(disk_util)),((cpu_util,mem_util),(disk_util))] i want to find the loaded machine based on cpu and mem and desk utilization by changing this order. I created a UI using that i can change the order of item in the tuple. But the problem is asc and desc sorting -- http://mail.python.org/mailman/listinfo/python-list
