docs: def get_best_single_experiments(nets,expvars):
    '''
    returns the experiments as a``TermSet`` object [instance].
    '''
    netsf    = nets.to_file()
    expvarsf = expvars.to_file()
  
    i = 1 #single experiment
  
    num_exp   = String2TermSet('pexperiment('+str(i)+')')
    num_expf  = num_exp.to_file()
    prg       = [ netsf, expvarsf, num_expf, find_best_exp_sets_prg ,
                  elem_path_prg ]
    coptions  = '--project --opt-mode=optN --opt-strategy=0 --opt-heuristic'
    solver    = GringoClasp(clasp_options=coptions)
    solutions = solver.run(prg,collapseTerms=True,collapseAtoms=False)
  
    os.unlink(num_expf)
  
    os.unlink(netsf)
    os.unlink(expvarsf)
    return solutions