How to use the ldappool.__init__.MaxConnectionReachedError function in ldappool

def _get_connection(self, bind=None, passwd=None):
        if bind is None:
            bind = self.bind
        if passwd is None:
            passwd = self.passwd

        if self.use_pool:
            # let's try to recycle an existing one
            conn = self._match(bind, passwd)
            if conn is not None:
                return conn

            # the pool is full
            if len(self._pool) >= self.size:
                raise MaxConnectionReachedError(self.uri)

        # we need to create a new connector
        conn = self._create_connector(bind, passwd)

        # adding it to the pool
        if self.use_pool:
            with self._pool_lock:
                self._pool.append(conn)
        else:
            # with no pool, the connector is always active
            conn.active = True

        return conn