code: def test_keywords(self):
      with os.popen(cmd="exit 0", mode="w", buffering=-1):
          pass
  
file_path: cpython/Lib/test/test_popen.py
imports: import unittest
  from test import support
  import os, sys
label_desc: Use image node_id 6 for calling the PopenTest obj's underlying member method code with example usage: obj.test_keywords() without return types