code: def test_sentiment_create_string_target(self):
      data_str = self.data[:]
      data_str["rating"] = data_str["rating"].astype(str)
      model = tc.text_classifier.create(data_str, target="rating")
      self.assertTrue(
          isinstance(model, tc.text_classifier.TextClassifier)
      )
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import unittest
  import tempfile
  import turicreate
  from turicreate.toolkits._main import ToolkitError
  from turicreate.toolkits._internal_utils import _mac_ver
  from .None import util
  import sys
label_desc: Use image node_id 3 for calling the TextClassifierCreateTests obj's underlying member method code with example usage: obj.test_sentiment_create_string_target() without return types