old_contents: import shim
  
  tmpdir = None
  
  def setUp():
      global tmpdir
      tmpdir = shim.setup_shim_for('kubectl')
  
  def tearDown():
      global tmpdir
      shim.teardown_shim_dir(tmpdir)
  
new_contents: from . import shim
  
  tmpdir = None
  
  def setUp():
      global tmpdir
      tmpdir = shim.setup_shim_for('kubectl')
  
  def tearDown():
      global tmpdir
      shim.teardown_shim_dir(tmpdir)
  
subject: Update relative imports in the Python library to support Python3