code: def test_init(self):
      data = Reader().read(
          "./tests/sentiment_data.txt",
          fmt="UITup",
          sep=",",
          tup_sep=":",
      )
      md = SentimentModality(data=data)
  
      self.assertEqual(len(md.raw_data), 4)
  
file_path: cornac/tests/cornac/data/test_sentiment.py
imports: import unittest
  import numpy
  from cornac.data import SentimentModality
  from cornac.data import Reader
  from collections import OrderedDict
  from scipy.sparse import dok_matrix
label_desc: Use image node_id 1 for calling the TestSentimentModality obj's underlying member method code with example usage: obj.test_init() without return types