code: def tearDown(self):
      super().tearDown()
      os.environ["HOME"] = self._original_home
  
imports: import os
  import textwrap
  import tensorflow
  from tfx.dsl.io import fileio
  from tfx.tools.cli import labels
  from tfx.tools.cli.handler import base_handler
label_desc: Use image node_id 2 for calling the BaseHandlerTest obj's underlying member method code with example usage: obj.tearDown() without return types