code: def setUp(self):
      super().setUp()
      self.loop = self.new_test_loop()
      self.set_event_loop(self.loop)
  
imports: import os
  import signal
  import sys
  import textwrap
  import unittest
  import warnings
  from unittest import mock
  import asyncio
  from asyncio import base_subprocess
  from asyncio import subprocess
  from test.test_asyncio import utils
  from test import support
  from test.support import os_helper
label_desc: Use image node_id 1 for calling the SubprocessTransportTests obj's underlying member method code with example usage: obj.setUp() without return types