a Df @s:ddlZddlZddlZddlZddlZGdddeZddZ e ddZ dZ d Z ee e e dZd ZeejdkreejdZejeed Zn ejed Ze d eeZeZee D]d}t||D]*}|ddkr,|d|8}q|d|7}q|S)zCalculates partial sumrg?)range)startendsumxrrr part_sum#s  rzUsage: python callback.py [ncpus] [ncpus] - the number of workers to run in parallel, if omitted it will be set to the number of processors in the system i-1r) ppserverszStarting pp with %s workers)callbackzPartial sum is %s | diff = %sr)$mathtime_threadrsysZppftppobjectrrprintrrpartsintsteprlenargvZncpusServerZ job_serverZ get_ncpusr start_timerindexZstartiminZendiZsubmitr waitrlogZ print_statsrrrr  s4