old_contents: try:
      __version__ = get_distribution(__name__).version
  except DistributionNotFound:
      # package is not installed
      pass
  default_app_config = "teryt_tree.apps.TerytTreeConfig"
  
new_contents: from pkg_resources import get_distribution, DistributionNotFound
  
  try:
      __version__ = get_distribution(__name__).version
  except DistributionNotFound:
      # package is not installed
      pass
  default_app_config = "teryt_tree.apps.TerytTreeConfig"
  
subject: Fix import in __init__.py