@requires_auth<EOL><INDENT>def find_free_prefix(self, args):<DEDENT>
try:<EOL><INDENT>return self.nip.find_free_prefix(args.get('<STR_LIT>'), args.get('<STR_LIT>'), args.get('<STR_LIT:args>'))<EOL><DEDENT>except NipapError as exc:<EOL><INDENT>self.logger.debug(unicode(exc))<EOL>raise Fault(exc.error_code, unicode(exc))<EOL><DEDENT>
Find a free prefix.

            Valid keys in the `args`-struct:

            * `auth` [struct]
                Authentication options passed to the :class:`AuthFactory`.
            * `args` [struct]
                Arguments for the find_free_prefix-function such as what prefix
                or pool to allocate from.