🐛 fix test error

import pytest

import deepchem as dc

from deepchem.molnet.run_benchmark import run_benchmark

class TestMolnet(unittest.TestCase):

    split = 'random'

    out_path = tempfile.mkdtemp()

    metric = [dc.metrics.Metric(dc.metrics.pearson_r2_score, np.mean)]

    dc.molnet.run_benchmark(

    run_benchmark(

        datasets, str(model), metric=metric, split=split, out_path=out_path)

    with open(os.path.join(out_path, 'results.csv'), newline='\n') as f:

      reader = csv.reader(f)

    split = 'random'

    out_path = tempfile.mkdtemp()

    metric = [dc.metrics.Metric(dc.metrics.pearson_r2_score, np.mean)]

    dc.molnet.run_benchmark(

    run_benchmark(

        datasets, str(model), metric=metric, split=split, out_path=out_path)

    with open(os.path.join(out_path, 'results.csv'), newline='\n') as f:

      reader = csv.reader(f)

    split = 'random'

    out_path = tempfile.mkdtemp()

    metric = [dc.metrics.Metric(dc.metrics.roc_auc_score, np.mean)]

    dc.molnet.run_benchmark(

    run_benchmark(

        datasets,

        str(model),

        metric=metric,