'get md5 of swift.conf'

def get_swift_conf_md5(self):

    hexsum = None
    try:
        hexsum = md5_hash_for_file(SWIFT_CONF_FILE)
    except IOError as err:
        if (err.errno != errno.ENOENT):
            self.logger.exception(_('Error    reading    swift.conf'))
    return {SWIFT_CONF_FILE: hexsum}
