code: def archive(self, ostream, treeish=None, prefix=None, **kwargs):
          
          if treeish is None:
              treeish = self.head.commit
          if prefix and 'prefix' not in kwargs:
              kwargs['prefix'] = prefix
          kwargs['output_stream'] = ostream
          path = kwargs.pop('path', [])
          if not isinstance(path, (tuple, list)):
              path = [path]
          # end assure paths is list
  
          self.git.archive(treeish, *path, **kwargs)
          return self
docs: Archive the tree at the given revision.
  
          :param ostream: file compatible stream object to which the archive will be written as bytes
          :param treeish: is the treeish name/id, defaults to active branch
          :param prefix: is the optional prefix to prepend to each filename in the archive
          :param kwargs: Additional arguments passed to git-archive
  
              * Use the 'format' argument to define the kind of format. Use
                specialized ostreams to write any format supported by python.
              * You may specify the special **path** keyword, which may either be a repository-relative
                path to a directory or file to place into the archive, or a list or tuple of multiple paths.
  
          :raise GitCommandError: in case something went wrong
          :return: self