new_contents: #! /usr/bin/env python3
  
  import unittest
  from DFA.DFA import DFA 
  import dfa_parser as DFAParser
  import characteristic_set_teacher as csteacher
  from learner import Learner
  
  
  
  class TestCharacteristicSetTeacher(unittest.TestCase):
       def test_one(self):
          dfa = DFAParser.from_dict(
          {'accepts': {2, 0},
          'start': 0,
          'transitions': {0: {'a': 1, 'b': 2}, 1: {'a': 2}, 2: {'a': 0, 'b': 1}}})
  
          t = csteacher.CharacteristicSetTeacher(dfa)
          samples = t.construct_char_set()
  
          l = Learner(drawsteps=True)
          l.rpni(samples[0], samples[1])
subject: create cteach_learner test