---
metadata:
    display_name: Problem with Adaptive Hint
    markdown: !!null
data: |
    <problem>
        <text>
            <p><h4>Problem With Adaptive Hint</h4></p>
            <p>This problem demonstrates a question with hints, based on using the <tt class="tt">hintfn</tt> method. </p>

            <customresponse cfn="test_str" expect="python">
            <script type="text/python" system_path="python_lib">
    def test_str(expect, ans):
      print(expect, ans)
      ans = ans.strip("'")
      ans = ans.strip('"')
      return expect == ans.lower()

    def hint_fn(answer_ids, student_answers, new_cmap, old_cmap):
      aid = answer_ids[0]
      ans = str(student_answers[aid]).lower()
      print('hint_fn called, ans=', ans)
      hint = ''
      if 'java' in ans:
         hint = 'that is only good for drinking'
      elif 'perl' in ans:
         hint = 'not that rich'
      elif 'pascal' in ans:
         hint = 'that is a beatnick language'
      elif 'fortran' in ans:
         hint = 'those were the good days'
      elif 'clu' in ans:
         hint = 'you must be invariant'
      if hint:
        hint = "&lt;font color='blue'&gt;Hint: {0}&lt;/font&gt;".format(hint)
        new_cmap.set_hint_and_mode(aid,hint,'always')
    </script>
                <label>What is the best programming language that exists today? You may enter your answer in upper or lower case, with or without quotes.</label>
                <textline correct_answer="python"/>
                <hintgroup hintfn="hint_fn"/>
            </customresponse>
        </text>
    </problem>