old_contents: from .core import Hub, gethub, Future, Condition, Lock
  from contextlib import contextmanager
  from functools import wraps
  
  __all__ = [
      'Hub',
      'gethub',
      'sleep',
      'Future',
      'Condition',
      'Lock',
      ]
  
  def sleep(value):
      gethub().do_sleep(value)
  
new_contents: from .core import Hub, gethub, Future, Condition, Lock
  from contextlib import contextmanager
  from functools import wraps
  
  __version__ = '0.2.a0'
  
  __all__ = [
      'Hub',
      'gethub',
      'sleep',
      'Future',
      'Condition',
      'Lock',
      ]
  
  def sleep(value):
      gethub().do_sleep(value)
  
subject: Add ``__version__``