code: def set_package(fxn):
      
      @functools.wraps(fxn)
      def set_package_wrapper(*args, **kwargs):
          warnings.warn('The import system now takes care of this automatically.',
                        DeprecationWarning, stacklevel=2)
          module = fxn(*args, **kwargs)
          if getattr(module, '__package__', None) is None:
              module.__package__ = module.__name__
              if not hasattr(module, '__path__'):
                  module.__package__ = module.__package__.rpartition('.')[0]
          return module
      return set_package_wrapper
docs: Set __package__ on the returned module.
      This function is deprecated.