Created by: vslyu

PR types

New features

PR changes

APIs

Describe

the initial configuration about fleet and rolemaker

Examples:
    .. code-block:: python

        import paddle.distributed.fleet as fleet
        fleet.init(is_collective=True)
        strategy = fleet.DistributedStrategy()
        optimizer = paddle.optimizer.SGD(learning_rate=0.001)
        optimizer = fleet.distributed_optimizer(optimizer, strategy=strategy)
        if fleet.is_first_worker():
            print("this is first worker")
        print("current node index: {}".format(fleet.worker_index()))
        print("total number of worker num: {}".format(fleet.worker_num()))
        if fleet.is_worker():
            print("this is worker")
        print("worker endpoints: {}".format(fleet.worker_endpoints(to_string=True)))
        print("server num: {}".format(fleet.server_num()))
        print("server endpoints: {}".format(fleet.server_endpoints(to_string=True)))
        if fleet.is_server():
            print("this is server")
        fleet.stop_worker()
"""