old_contents: __version__ = 'unknown'
  try:
      __version__ = __import__('pkg_resources').get_distribution('django_richenum').version
  except Exception as e:
      pass
  
new_contents: __version__ = 'unknown'
  try:
      __version__ = __import__('pkg_resources').get_distribution('django_richenum').version
  except Exception:
      pass
  
subject: Fix lint issue