code: def test_read_from_file(self, lazy):
      reader = StanfordSentimentTreeBankDatasetReader(lazy=lazy)
      instances = reader.read(self.sst_path)
      instances = ensure_list(instances)
  
      instance1 = {
          "tokens": ["The", "actors", "are", "fantastic", "."],
          "label": "4",
      }
      instance2 = {
          "tokens": ["It", "was", "terrible", "."],
          "label": "0",
      }
      instance3 = {"tokens": ["Chomp", "chomp", "!"], "label": "2"}
  
      assert len(instances) == 3
      fields = instances[0].fields
      assert [t.text for t in fields["tokens"].tokens] == instance1[
          "tokens"
      ]
      assert fields["label"].label == instance1["label"]
      fields = instances[1].fields
      assert [t.text for t in fields["tokens"].tokens] == instance2[
          "tokens"
      ]
      assert fields["label"].label == instance2["label"]
      fields = instances[2].fields
      assert [t.text for t in fields["tokens"].tokens] == instance3[
          "tokens"
      ]
      assert fields["label"].label == instance3["label"]
  
file_path: magnitude/pymagnitude/third_party/allennlp/tests/data/dataset_readers/stanford_sentiment_tree_bank_test.py
imports: from __future__ import division
  from __future__ import absolute_import
  import pytest
  from allennlp.data.dataset_readers import StanfordSentimentTreeBankDatasetReader
  from allennlp.common import Params
  from allennlp.common.util import ensure_list
  from allennlp.common.testing import AllenNlpTestCase
label_desc: Use image node_id 1 for calling the TestStanfordSentimentTreebankReader obj's underlying member method code with example usage: obj.test_read_from_file(lazy) without return types