@asyncio.coroutine<EOL><INDENT>def add_client(self, client_identifier):<DEDENT>
if client_identifier in self.clients:<EOL><INDENT>_LOGGER.error('<STR_LIT>', client_identifier, self.identifier)<EOL>return<EOL><DEDENT>new_clients = self.clients<EOL>new_clients.append(client_identifier)<EOL>yield from self._server.group_clients(self.identifier, new_clients)<EOL>_LOGGER.info('<STR_LIT>', client_identifier, self.identifier)<EOL>self._server.client(client_identifier).callback()<EOL>self.callback()<EOL>
Add a client.