class_docstr: DataQueue test
code: def test_one_empty_que(self):
      que = DataQueue([("vec", ColumnType.QUEUE)])
      self.assertEqual(que.size, 0)
      que.seal()
      self.assertEqual(que.size, 0)
  
imports: import unittest
  import threading
  import time
  from functools import partial
  from towhee.runtime.data_queue import DataQueue, ColumnType, Empty
label_desc: Use image node_id 24 for calling the TestDataQueue obj's underlying member method code with example usage: obj.test_one_empty_que() without return types