How to use the tableauserverclient.server.ConnectionItem.from_response function in tableauserverclient

def _get_workbook_connections(self, workbook_item, req_options=None):
        url = "{0}/{1}/connections".format(self.baseurl, workbook_item.id)
        server_response = self.get_request(url, req_options)
        connections = ConnectionItem.from_response(server_response.content, self.parent_srv.namespace)
        return connections

def update_connection(self, workbook_item, connection_item):
        url = "{0}/{1}/connections/{2}".format(self.baseurl, workbook_item.id, connection_item.id)
        update_req = RequestFactory.Connection.update_req(connection_item)
        server_response = self.put_request(url, update_req)
        connection = ConnectionItem.from_response(server_response.content, self.parent_srv.namespace)[0]

        logger.info('Updated workbook item (ID: {0} & connection item {1}'.format(workbook_item.id,
                                                                                  connection_item.id))
        return connection

def _get_flow_connections(self, flow_item, req_options=None):
        url = '{0}/{1}/connections'.format(self.baseurl, flow_item.id)
        server_response = self.get_request(url, req_options)
        connections = ConnectionItem.from_response(server_response.content, self.parent_srv.namespace)
        return connections

def update_connection(self, flow_item, connection_item):
        url = "{0}/{1}/connections/{2}".format(self.baseurl, flow_item.id, connection_item.id)

        update_req = RequestFactory.Connection.update_req(connection_item)
        server_response = self.put_request(url, update_req)
        connection = ConnectionItem.from_response(server_response.content, self.parent_srv.namespace)[0]

        logger.info('Updated flow item (ID: {0} & connection item {1}'.format(flow_item.id,
                                                                              connection_item.id))
        return connection

def _get_workbook_connections(self, workbook_item, req_options=None):
        url = "{0}/{1}/connections".format(self.baseurl, workbook_item.id)
        server_response = self.get_request(url, req_options)
        connections = ConnectionItem.from_response(server_response.content, self.parent_srv.namespace)
        return connections

def update_connection(self, datasource_item, connection_item):
        url = "{0}/{1}/connections/{2}".format(self.baseurl, datasource_item.id, connection_item.id)

        update_req = RequestFactory.Connection.update_req(connection_item)
        server_response = self.put_request(url, update_req)
        connection = ConnectionItem.from_response(server_response.content, self.parent_srv.namespace)[0]

        logger.info('Updated datasource item (ID: {0} & connection item {1}'.format(datasource_item.id,
                                                                                    connection_item.id))
        return connection

def update_connection(self, workbook_item, connection_item):
        url = "{0}/{1}/connections/{2}".format(self.baseurl, workbook_item.id, connection_item.id)
        update_req = RequestFactory.Connection.update_req(connection_item)
        server_response = self.put_request(url, update_req)
        connection = ConnectionItem.from_response(server_response.content, self.parent_srv.namespace)[0]

        logger.info('Updated workbook item (ID: {0} & connection item {1}'.format(workbook_item.id,
                                                                                  connection_item.id))
        return connection