metrics 计算报错

[miaozjs]

metrics.py 文件中计算报错，断点调试，计算的 stdout 为 ''，转换float报错，文件中完整代码如下，这里应该如何处理，是否subprocess.Popen中指令需要变动，期待大佬的解答！

@register('map')
@register('mrr')
def ranking(outputs):
    args = outputs['args']
    dataset = outputs['dataset']
    prediction = [o[1] for o in outputs['prob']]
    ref_file = os.path.join(dataset, '{}.ref'.format(args.eval_file))
    rank_file = os.path.join(dataset, '{}.rank'.format(args.eval_file))
    tmp_file = os.path.join(args.summary_dir, 'tmp-pred.txt')
    with open(rank_file) as f:
        prefix = []
        for line in f:
            prefix.append(line.strip().split())
        assert len(prefix) == len(prediction), \
            'prefix {}, while prediction {}'.format(len(prefix), len(prediction))
    with open(tmp_file, 'w') as f:
        for prefix, pred in zip(prefix, prediction):
            prefix[-2] = str(pred)
            f.write(' '.join(prefix) + '\n')
    sp = subprocess.Popen('./resources/trec_eval {} {} | egrep "map|recip_rank"'.format(ref_file, tmp_file),
                          shell=True,
                          stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    stdout, stderr = sp.communicate()
    stdout, stderr = stdout.decode(), stderr.decode()
    os.remove(tmp_file)
    if '':
        print(00)
    else:
        print('11')
    map_, mrr = [float(s[-6:]) for s in stdout.strip().split('\n')]
    return {
        'map': map_,
        'mrr': mrr,
    }

[miaozjs]

报错位置为return 的上一行
map_, mrr = [float(s[-6:]) for s in stdout.strip().split('\n')]