Solved by Pranavan_Theivendira in post #6 
              
              
                Hi Niki, 
For that, you need the sizes of each individual shuffel sizes.  For example if the shuffel[1] size is M. You can extract shuffel[1] as follows. 
shuffel_1 = labels_total[N:N+M]

You have to use the proper indices to slice them correctly. 
FYI, you did not delete the shuffel arrays/lists. T…