code: def from_mpi_omp_lists(cls, mpi_procs, omp_threads):
          
          info = {}
          confs = [ParalConf(mpi_ncpus=p, omp_ncpus=p, efficiency=1.0)
                   for p, t in product(mpi_procs, omp_threads)]
  
          return cls(info, confs)
docs: Build a list of Parallel configurations from two lists
          containing the number of MPI processes and the number of OpenMP threads
          i.e. product(mpi_procs, omp_threads).
          The configuration have parallel efficiency set to 1.0 and no input variables.
          Mainly used for preparing benchmarks.