Loncapa problem allowing straight-up Python execution, returning output

gistfile1.txt

<problem>
  <script type="loncapa/python">

out = "[missing]"

def run_code(expect, answer_inputs):
  global out
  exec(answer_inputs, globals(), globals())
  return {
    "input_list": [
      {
        "ok": True,
        "msg": f"Output:\n{out}",
        "grade_decimal": 1,
      },
    ],
  }

  </script>
  <customresponse cfn="run_code">
    <p>Set output variable <code>out</code> to see results.</p>
    <textbox>out = "..."</textbox>
  </customresponse>
</problem>