class_docstr: Class containing unit tests for nltk.metrics.agreement.Disagreement.
docstr: Same simple test with 1 rating removed.
  Removal of that rating should not matter: K-Apha ignores items with
  only 1 rating.
docstr_tok: ["Same","simple","test","with","1","rating","removed",".","Removal","of","that","rating","should","not","matter",":","K-Apha","ignores","items","with","only","1","rating","."]
code: def test_easy2(self):
      """
      Same simple test with 1 rating removed.
      Removal of that rating should not matter: K-Apha ignores items with
      only 1 rating.
      """
      data = [
          ("coder1", "dress1", "YES"),
          ("coder2", "dress1", "NO"),
          ("coder3", "dress1", "NO"),
          ("coder1", "dress2", "YES"),
          ("coder2", "dress2", "NO"),
      ]
      annotation_task = AnnotationTask(data)
      self.assertAlmostEqual(annotation_task.alpha(), -0.3333333)
  
file_path: nltk/nltk/test/unit/test_disagreement.py
imports: import unittest
  from nltk.metrics.agreement import AnnotationTask
label_desc: Use image node_id 2 for calling the TestDisagreement obj's underlying member method code with example usage: obj.test_easy2() without return types