docs: def get_archive(self, archive_name, default_version=None):
          '''
          Retrieve a data archive
  
          Parameters
          ----------
  
          archive_name: str
              Name of the archive to retrieve
  
          default_version: version
              str or :py:class:`~distutils.StrictVersion` giving the default
              version number to be used on read operations
  
          Returns
          -------
          archive: object
              New :py:class:`~datafs.core.data_archive.DataArchive` object
  
          Raises
          ------
  
          KeyError:
              A KeyError is raised when the ``archive_name`` is not found
  
          '''
  
          auth, archive_name = self._normalize_archive_name(archive_name)
  
          res = self.manager.get_archive(archive_name)
  
          if default_version is None:
              default_version = self._default_versions.get(archive_name, None)
  
          if (auth is not None) and (auth != res['authority_name']):
              raise ValueError(
                  'Archive "{}" not found on {}.'.format(archive_name, auth) +
                  ' Did you mean "{}://{}"?'.format(
                      res['authority_name'], archive_name))
  
          return self._ArchiveConstructor(
              api=self,
              default_version=default_version,
              **res)