old_contents: from .loader import append_feed, delete_feed, overwrite_feed, list_feeds
  from .schedule import Schedule
  from ._version import version as __version__
  
new_contents: import warnings
  
  from .loader import append_feed, delete_feed, overwrite_feed, list_feeds
  from .schedule import Schedule
  
  try:
      from ._version import version as __version__
  except ImportError:
      warnings.warn("pygtfs should be installed for the version to work")
      __version__ = "0"
  
subject: Allow usage directly from the code (fix the _version import)