def _default_temporary_directory(self, prefix):
try:<EOL><INDENT>self.temporary_file = tempfile.NamedTemporaryFile(prefix=prefix)<EOL><DEDENT>except OSError as err: <EOL><INDENT>logger.critical('<STR_LIT>'+repr(err))<EOL>raise securesystemslib.exceptions.Error(err)<EOL><DEDENT>
__init__ helper.