code: def test_drop_record(self):
      msg_id = self.load_records()[-1]
      rec = self.db.get_record(msg_id)
      self.db.drop_record(msg_id)
      with pytest.raises(KeyError):
          self.db.get_record(msg_id)
  
imports: import logging
  import os
  import tempfile
  import time
  from datetime import datetime, timedelta
  from unittest import TestCase
  import pytest
  from jupyter_client.session import Session
  from ipyparallel import util
  from ipyparallel.controller.dictdb import DictDB
  from ipyparallel.controller.hub import init_record
  from ipyparallel.controller.sqlitedb import SQLiteDB
  from ipyparallel.util import utc
label_desc: Use image node_id 5 for calling the TaskDBTest obj's underlying member method code with example usage: obj.test_drop_record() without return types