code: def test_get_score_df(self):
      corpus = build_hamlet_jz_corpus()
  
      self.assertEqual(
          set(
              CredTFIDF(corpus)
              .set_categories("hamlet")
              .get_score_df()
              .columns
          ),
          set(
              ["pos_cred_tfidf", "neg_cred_tfidf", "delta_cred_tf_idf"]
          ),
      )
  
imports: from unittest import TestCase
  import numpy
  from scattertext.termscoring.CredTFIDF import CredTFIDF
  from scattertext.test.test_termDocMatrixFactory import build_hamlet_jz_corpus
label_desc: Use image node_id 1 for calling the TestCredTFIDF obj's underlying member method code with example usage: obj.test_get_score_df() without return types